Infusion Set Insertion Device with Elastic Holding and Guide Cam
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Solution Overview
Problem
Existing insertion devices for infusion sets have complex structures and are difficult to operate, requiring a propulsion device to be prestressed, which complicates the insertion process and may not ensure safety.
Innovation Solution
A simplified insertion device with a propulsion mechanism that moves from a proximal to a distal position along a central axis, utilizing a holding element with elastic arms and a guide cam system, allowing for easier operation and safer insertion of the infusion set into the skin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a lever mechanism is used for insertion, then the insertion function is achieved, but the structure becomes complicated with many components
Solution Approach 1:
The patent extracts the essential insertion function from the complex lever mechanism, retaining only the necessary guide element and propulsion device while eliminating redundant components. The holding element with elastic arms provides a simplified alternative to the full lever mechanism, achieving insertion with fewer parts.
Solution Approach 2:
The patent changes the mechanical parameters of the insertion system by replacing the rigid lever mechanism with an elastic holding element that uses flexibility and elastic deformation to achieve the same insertion function, thereby simplifying the overall structure.
2Force
If a propulsion device is prestressed from relaxed to operational position, then the insertion force is provided, but the operation becomes more difficult
Solution Approach 1:
The propulsion device is pre-assembled in the operational position within the housing, with the holding element already in its tensioned state. This preliminary preparation eliminates the need for users to manually prestress the mechanism during operation, making the device easier to use while maintaining the necessary insertion force.
3Ease of operation
If the holding element is made elastic to enable snapping in and out, then the ease of operation is improved, but the control over insertion depth may be reduced
Solution Approach 1:
The guide element acts as an intermediary between the elastic holding element and the infusion set, providing mechanical guidance that ensures precise insertion depth. The guide element's geometry constrains the motion of the elastic arms, allowing them to snap in and out easily while maintaining controlled insertion depth through the guiding relationship.
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 device simplifies the insertion process, reduces complexity, and ensures a safer method for inserting infusion sets by using a tensioned propulsion mechanism that can be easily rotated to facilitate the insertion and removal of the infusion set.
Implementation Method 1
The holding arm is preferably designed to be elastic
Data Source
Figure 1
Figure 2a~2b
Figure 2c~2d
AI summary
The invention relates to an insertion device for an infusion set (8) comprising: - a propulsion device (3, 4) for moving the infusion set (8) from a proximal position to a distal position along a central axis (z), - a holding element (2) for holding the infusion set (8), wherein the holding element (2) has a guide element, - a base part (1) which receives the holding element (2), wherein a guide counter element is attached to the base part (1), and the base part (1) has a contact surface for placing the insertion device on an application site on the body of a patient, - a head part (5) which is rotatably arranged relative to the base part (1) about the central axis (z), - wherein, furthermore, during a relative rotation between the head part (5) and the base part (1) in a first direction of rotation, the guide element of the holding element (2) can be guided by the guide counter element provided on the base part (1).wherein the retaining element (2) is movable relative to the base part (1) from a distal position to a proximal position along the central axis (z).