U-Bracket Resilient Support for Medicament Container Positioning
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Solution Overview
Problem
Existing medicament delivery devices face challenges in effectively managing tolerance variations between the medicament container and the device, leading to potential rattling or movement of the container, and lack adequate user feedback mechanisms, especially for operations outside professional healthcare settings.
Innovation Solution
A U-bracket design for medicament delivery devices that includes a first and second longitudinally extending leg connected by a transversal end portion, with radially outward bent portions to provide a bouncy feature and symmetrically aligned support for the medicament container, enabling steady positioning and user feedback through audible and tactile mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a rigid support structure is used for the medicament container, then positioning precision is improved, but tolerance management deteriorates due to inability to accommodate variations
Solution Approach 1:
The U-bracket incorporates resilient elements that change their mechanical parameters (flexibility, damping characteristics) to accommodate tolerance variations while maintaining stable positioning. The resilient nature allows the bracket to adapt to dimensional variations in the medicament container without compromising positioning precision.
Solution Approach 2:
The support structure transitions from a static rigid design to a dynamic resilient system. The U-bracket with resilient elements can dynamically adjust to forces exerted on the device, such as during dropping events, while maintaining the medicament container in a stable positioned state.
2Adaptability or versatility
If a resilient support structure is used for the medicament container, then tolerance management is improved, but positioning precision deteriorates due to potential movement
Solution Approach 1:
The resilient U-bracket creates a dynamic support system that can adapt to tolerance variations while maintaining stable positioning. The resilience allows the bracket to absorb dimensional variations and still hold the medicament container securely in place.
Solution Approach 2:
The resilient elements in the U-bracket provide beforehand cushioning against forces that may displace the medicament container. This cushioning effect compensates for tolerance variations and prevents excessive movement, maintaining positioning precision despite the resilient nature of the support.
3Manufacturing precision
If the U-bracket diameter is increased to improve support stability, then positioning precision is improved, but device complexity increases
Solution Approach 1:
The U-bracket utilizes flexible resilient elements that provide the necessary support and stability without requiring a large diameter structure. The flexibility of the resilient material allows a compact design to achieve the same stabilizing effect as a larger rigid structure, thereby reducing device complexity.
Solution Approach 2:
The U-bracket combines rigid structural elements with resilient materials to create a composite support system. This composite approach provides enhanced positioning precision through the rigid components while the resilient elements add adaptability without significantly increasing the overall diameter or complexity of the device.
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 U-bracket effectively stabilizes the medicament container within the device, reducing rattling and movement, while providing essential user feedback during medicament delivery operations, enhancing usability and safety, especially for untrained users outside healthcare settings.
Implementation Method 1
a first energy accumulation member arranged to bias the plunger rod in a proximal direction towards the proximal end and to bias the U-bracket in a distal direction
Implementation Method 2
a proximal end of the first longitudinally extending leg being bent radially outward, thereby defining a first bent portion
Data Source
AI summary
The present disclosure provides medicament delivery device, comprising a housing, a plunger rod, a tubular extension member, a U-bracket, a first energy accumulation member, and a medicament container, said U-bracket comprising a first longitudinally extending leg and a second longitudinally extending leg, a distal end of the first longitudinally extending leg being connected to a distal end of the second longitudinally extending leg by a transversal end portion of the U-bracket, a proximal end of the first longitudinally extending leg being bent radially outward, thereby defining a first bent portion, the U-bracket comprising a third longitudinally extending leg, a distal end of the third longitudinally extending leg being attached to the first bent portion, a proximal end of the third longitudinally extending leg comprising a radially extending portion, the radially extending portion of the third longitudinally extending leg defining a first radial foot, the first radial foot supporting the medicament container by abutting a flange of the medicament container.