Medicament Delivery Device with Automatic Needle Shield Release
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Solution Overview
Problem
Existing medicament delivery devices are often unreliable, require unnecessary steps, and may unintentionally be actuated, especially when needing to maintain the needle out of sight and reach, and when slow rate mixing is required.
Innovation Solution
A medicament delivery device with a housing containing a multi-chamber container and a power assembly that is actuated by a manually operable assembly, which, upon manual movement, pressurizes the container to mix and deliver the medicament, and includes a needle shield sleeve that automatically releases accumulated energy for delivery without requiring user intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the device uses a locking means that requires active removal by the user after mixing, then the mixing process can be controlled, but the operation becomes more complex and time-consuming
Solution Approach 1:
The device automatically releases the locking means after the mixing process is complete. The power assembly, upon being actuated, automatically triggers the release mechanism that moves the needle shield sleeve, exposing the needle and enabling injection without requiring the user to manually remove the locking means.
2Object-affected harmful factors
If the needle is kept out of sight and reach during storage and transport, then user safety is improved, but the device complexity increases due to additional shielding mechanisms
Solution Approach 1:
The locking means and needle shield sleeve are combined into a single integrated component. The needle shield sleeve serves dual functions: it shields the needle during storage and transport, and it acts as the locking means that prevents premature actuation. When the power assembly is actuated, the same mechanism that releases the lock also moves the shield sleeve to expose the needle.
3Reliability
If the device is designed to prevent accidental actuation through locking means, then reliability is improved, but the ease of operation deteriorates due to additional steps
Solution Approach 1:
The device automatically transitions from the locked state to the active state upon application of force to the power assembly. The power assembly's movement automatically triggers the release of the locking means and the exposure of the needle, eliminating the need for separate manual unlocking steps.
4Productivity
If the power assembly is manually actuated to pressurize the container, then control over medicament delivery is improved, but the device complexity increases due to the manual assembly mechanism
Solution Approach 1:
The power assembly serves multiple functions: it is manually actuated to pressurize the container for mixing, and its movement automatically triggers the release mechanism that exposes the needle and enables injection. The same mechanical movement accomplishes both the mixing function and the transition to the injection state.
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 simplifies the operation by eliminating the need for active removal of locking means, ensuring safe and reliable slow rate mixing, and preventing accidental actuation, thus enhancing user safety and ease of use.
Implementation Method 1
a power assembly having accumulated energy, arranged in the housing and configured to act on the multi-chamber container for obtaining and delivering a blended compound inside the multi-chamber container
Implementation Method 2
the needle shield sleeve being configured to interact with the power assembly to release the accumulated energy after the power assembly has been moved towards the proximal end
Data Source
AI summary
A medicament delivery device is presented having a housing with a proximal end and a distal end, a multi-chamber container arranged in the housing, a power assembly having accumulated energy arranged in the housing and configured to act on the multi-chamber container for obtaining and delivering a blended compound inside the multi-chamber container and a manually operable assembly extending from the distal end of the housing and being connected with the power assembly, wherein upon a manual movement of the manually operable assembly the power assembly is forced to move towards the proximal end to pressurize the multi-chamber container and wherein the medicament delivery device further comprises a needle shield sleeve slidably arranged in the housing, the needle shield sleeve being configured to interact with the power assembly to release the accumulated energy after the power assembly has been moved towards the proximal end.