Medicament Eject Button for Safe Interface Detachment
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Solution Overview
Problem
Users with reduced manual dexterity face challenges in safely and reliably removing the dispense interface from medicament delivery devices, leading to potential safety issues and uncertainty in fluid communication, which can result in medicament loss or incorrect dosing.
Innovation Solution
A medicament delivery device with a detachable dispense interface that can be moved between a securely engaged and a partially engaged position, actuated by a biasing element and user-activated button, allowing for manual detachment without tools, ensuring safe and reliable removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a frictional fit mechanism is used to hold the dispense interface, then the interface remains securely engaged during use, but users with reduced manual dexterity cannot easily remove it, creating safety issues and uncertainty in fluid communication
Solution Approach 1:
The removal mechanism is segmented into distinct functional components: an actuator button for user activation, a biasing element for automatic engagement, and inter-engageable elements for mechanical coupling. This segmentation allows the system to provide both secure engagement during use and easy removal when needed, resolving the contradiction between reliability and ease of operation.
Solution Approach 2:
The biasing element automatically engages the inter-engageable elements to secure the dispense interface during use, and automatically disengages them when the actuator is pressed, enabling the mechanism to serve itself without requiring complex user manipulation. This self-service capability resolves the contradiction by providing both secure engagement and easy removal.
2Reliability
If a coordinated manoeuvre is required to remove the dispense interface, then fluid communication can be maintained during use, but the complexity of removal increases, leading to potential needle stick injuries and medicament loss
Solution Approach 1:
The actuator button extracts the removal function from the complex coordinated manoeuvre, allowing users to initiate removal with a single simple action. The biasing element then handles the rest of the disengagement process automatically, reducing the removal procedure from a complex coordinated manoeuvre to a simple button press while maintaining fluid communication integrity during use.
Solution Approach 2:
The biasing element performs preliminary engagement of the inter-engageable elements to establish secure connection and fluid communication before use. During removal, the biasing element performs preliminary disengagement actions automatically after the actuator is pressed, eliminating the need for users to perform complex coordinated manoeuvres and reducing the risk of needle stick injuries and medicament loss.
3Stability of the object's composition
If the dispense interface is held in place by friction, then it remains stable during injection, but users lacking manual dexterity cannot reliably detach it, increasing safety risks
Solution Approach 1:
The system transitions from a static friction-based holding mechanism to a dynamic system where the biasing element actively engages and disengages inter-engageable elements. During injection, the engaged state provides stable frictional holding. During removal, the actuator triggers the biasing element to dynamically disengage the inter-engageable elements, allowing easy detachment even for users with reduced manual dexterity while maintaining stability during use.
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 solution provides a safe and reliable mechanism for removing the dispense interface, reducing the risk of medicament loss and ensuring accurate dosing by ensuring the interface is not in fluid communication during detachment, thus enhancing user safety and ease of use.
Implementation Method 1
the actuator comprises at least one biasing element which biases the dispense interface away from the housing
Data Source
AI summary
A medicament delivery device comprises a housing having a longitudinal axis, a medicament delivery mechanism within the housing, a dispense interface disengagement actuator and a detachable dispense interface. The interface is moveable between a first operative position in which the dispense interface is securely engaged and at least partially contained within the housing, and a second non-operative position in which the dispense interface is partially engaged and at least partially extending from the housing such that it can be detached from the housing manually. The travel of the dispense interface from the first position to the second position is along the longitudinal axis in a direction away from the housing and the movement from the first to the second position is actuated by the dispense interface disengagement actuator.