Offset-Prong Needle Shield Remover for Stable Cap Assembly
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Solution Overview
Problem
Existing medicament delivery devices face challenges in efficiently removing needle shields, which are not effectively removed due to the needle shield remover's design impeding the assembly process and risking damage to the medicament container.
Innovation Solution
A needle shield remover with offset shield gripping members and cap attachment features that enhance assembly stability and prevent rotation, ensuring secure grip and alignment during removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If prongs extend radially inward to maximize gripping force, then gripping force is improved, but assembly becomes difficult due to collision with needle shield
Solution Approach 1:
The shield gripping members are divided into multiple segments (first and second shield gripping members) arranged offset around the remover body circumference. This segmentation allows each segment to be positioned at different radial locations, enabling them to grip the needle shield at multiple points without requiring any single prong to extend too far radially inward, thus avoiding collision during assembly while maintaining effective gripping force.
Solution Approach 2:
Instead of extending prongs radially inward in a single dimension, the shield gripping members are distributed around the circumference of the remover body, adding a circumferential dimension to the gripping mechanism. This dimensional change allows the gripping force to be distributed around the needle shield perimeter, achieving effective gripping without requiring deep radial extension that would cause assembly collision.
2Stability of the object's composition
If needle shield remover is firmly coupled with cap to prevent detachment and rotation, then stability is improved, but device complexity increases
Solution Approach 1:
The cap fastening members are merged with the remover body structure, forming an integrated assembly mechanism. The cap recess receives the remover body, and the cap fastening members extend into the cap to provide both axial positioning and rotational prevention in a unified structure, achieving stable coupling without adding separate complex components.
Solution Approach 2:
The cap fastening members serve multiple functions simultaneously: they prevent axial detachment of the cap from the remover body, prevent rotation of the assembly, and provide structural support. This multi-functionality achieves stable coupling while minimizing the number of components required, thereby reducing overall device complexity.
Data Source
AI summary
A needle shield remover for assembly with a cap of a medicament delivery device is presented, having a remover body with a proximal end and a distal end, and at least one first shield gripping member, and at least one second shield gripping member, where the first shield gripping member and the second shield gripping member configured to engage the needle shield. The first shield gripping member and the second shield gripping member are arranged offset in relation to each other both in the longitudinal direction and along the circumference surface of the remover body.