Modular Infusion Pump Bayonet Connector for Stable Electrical Contact
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing modular patch pumps face challenges in achieving reliable and reproducible electrical contact between reusable and single-use modules due to geometric production tolerances and difficulties in accommodating drive forces, leading to complex plug connections and potential misalignment.
Innovation Solution
A modular administration device with a bayonet connector system that aligns modules for rotational connection, ensuring secure electrical contact through offset electrical contact arrangements, allowing for compensation of manufacturing tolerances and stable power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a simple plug connection is used between reservoir module and pump module, then the device is easier to manufacture and assemble, but the electrical contact becomes unreliable due to geometric production tolerances
Solution Approach 1:
The electrical contact arrangement is designed to be movable rather than fixed, allowing it to dynamically adjust its position to compensate for geometric production tolerances. The contact elements can move within their respective modules during the plugging process to ensure reliable electrical contact despite manufacturing variations in the plug connection geometry.
2Strength
If the plug connection must accommodate drive forces, then the connection becomes more robust, but the design complexity increases and part allocation options are limited
Solution Approach 1:
The plug connection is segmented into separate functional zones: one area handles mechanical drive forces and transmission, while another area is dedicated to electrical contact. This segmentation allows each zone to be optimized independently - the mechanical zone for strength and the electrical zone for reliable contact - without the design constraints that would arise from trying to combine both functions in a single integrated structure.
Data Source
AI summary
A modular device for administering a fluid medicament fixable to the skin of a user includes a reservoir module with a reservoir defining a first axis, a first connecting structure and a first electrical contact arrangement; and a pump module with a piston rod defining a second axis, a second connecting structure arranged around the piston rod, and a second electrical contact arrangement. The first and second connecting structures are plugged together and the first axis and the second axes lie on a common axis forming a rotational axis. The pump module is rotated relative to the reservoir module about this rotational axis to electrically connect the first and second electrical contact arrangements. The first contact arrangement is displaced radially farther from the first axis than the first connecting structure, and the second electrical contact arrangement is displaced radially farther from the second axis than the second connecting structure.