Medicament Delivery Device with Primed Actuator Safety Lock
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Solution Overview
Problem
Existing medicament delivery devices, particularly large volume devices, risk accidental operation by patients due to lack of safety mechanisms, leading to potential misuse and degradation of components.
Innovation Solution
A medicament delivery device with a housing having moveable portions and an actuator that is impeded from operation until moved to a primed position, featuring a biasing member that requires pre-priming and a dispensing lock to prevent accidental actuation, along with a needle mechanism for controlled medicament delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the actuator is always accessible and operable, then the device is easy to operate, but accidental actuation may occur causing safety hazards
Solution Approach 1:
The device requires a priming action to be performed before the actuator becomes operable. The second portion of the housing must be moved from an initial position to a primed position, which enables the actuator to be actuated. This preliminary priming action ensures that the device cannot be accidentally activated, as the actuator remains impeded until the deliberate priming step is completed.
2Ease of operation
If the biasing member is stored in a resiliently deformed state, then the dispensing mechanism is ready for immediate use, but the biasing member degrades over time causing reduction in biasing force
Solution Approach 1:
The biasing member is not pre-deformed during manufacturing and storage. Instead, it is deformed to the required resilient state during the priming operation, just before use. This eliminates long-term degradation issues while ensuring the device is ready for immediate dispensing after priming.
Solution Approach 2:
The biasing member transitions from an undeformed state during storage to a deformed state during operation. The system dynamically adjusts the state of the biasing member based on operational requirements, rather than maintaining a static pre-deformed state throughout the product lifecycle.
3Ease of operation
If the actuator protrudes from the housing, then the actuator is easily accessible, but accidental actuation risk increases
Solution Approach 1:
The actuator only protrudes from the housing after the priming action has been performed. In the initial state, the actuator is retracted and impeded, preventing accidental activation. The protruding position is achieved only after the deliberate priming step, at which point the device is intended to be used.
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 device ensures safe and controlled medicament delivery by preventing accidental actuation, maintaining component integrity, and facilitating easy operation by patients, especially the elderly or infirm.
Implementation Method 1
the biasing member is configured to resiliently deform when the second portion of the housing is moved from the initial position to the primed position such that the biasing member exerts a biasing force on the dispensing member
Data Source
AI summary
The present disclosure relates to a medicament delivery device. The medicament delivery device comprises a housing, a dispensing mechanism and an actuator. The housing has first and second portions. The dispensing mechanism comprises a reservoir disposed in the housing. The dispensing mechanism is operable to dispense medicament from the reservoir when the reservoir contains medicament. The first portion of the housing comprises a distal end and the second portion is moveable towards the distal end from an initial position to a primed position. The dispensing mechanism is rendered inoperable when the second portion is in the initial portion. The actuator is actuatable to operate the dispensing mechanism when the second portion is in the primed position.