Dual-Clip Cap Structure for Reliable Needle Shield Removal
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Solution Overview
Problem
Existing medicament delivery devices face challenges in efficiently removing the needle shield during administration, leading to cumbersome and inefficient processes.
Innovation Solution
A cap design with flexible first and second clips that engage with different features of the delivery member shield, allowing for efficient removal by pulling off the cap, featuring a central channel with first clips engaging the distal end and second clips engaging the outer surface or recesses of the shield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single type of clip is used to engage the delivery member shield, then the structure is simpler, but the engagement reliability is insufficient
Solution Approach 1:
The clip structure is segmented into two distinct types: first clips with a first extension length and second clips with a second extension length. This segmentation allows each clip type to engage with different features of the delivery member shield (distal end vs. outer surface/recesses), thereby improving engagement reliability while maintaining reasonable structural complexity
Solution Approach 2:
Different portions of the cap engage with different features of the delivery member shield using locally optimized clip designs. The first clips are positioned and dimensioned to engage the distal end, while the second clips are positioned and dimensioned to engage the outer surface or recesses, creating local quality variations that enhance overall engagement reliability
2Ease of operation
If the cap design engages only one feature of the delivery member shield, then the manufacturing is simpler, but the ease of operation is reduced
Solution Approach 1:
The cap incorporates two segmented clip systems with different extension lengths, allowing simultaneous engagement with multiple features of the delivery member shield. This segmentation enables the user to pull the cap off efficiently as both clip types work together to secure the shield during removal
Solution Approach 2:
The cap structure serves multiple functions through its dual clip system: the first clips engage the distal end while the second clips engage the outer surface or recesses. This multi-functionality allows a single cap design to handle various engagement scenarios, improving ease of operation despite increased structural complexity
Data Source
AI summary
The present disclosure provides a cap for a medicament delivery device including a delivery member shield. The cap includes a body having a proximal end portion and a distal end portion, where the distal end portion has a smaller radial dimension than the proximal end portion. The distal end portion includes a central channel configured to receive the delivery member shield. The distal end portion further includes a plurality of flexible first clips and a plurality of second clips extending radially inwards into the central channel. Each second clip extends further in a proximal direction towards the proximal end portion than the first clips.