Two-Part Needle Assembly for Compact Medicament Delivery
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Solution Overview
Problem
Existing mini infusers face challenges in achieving high automatic functionality while maintaining a compact design and minimizing the number of components, with issues related to needle bending and penetration control, which can lead to damage and improper injection.
Innovation Solution
A medicament delivery device with a housing, angled needle assembly, and a drive mechanism using a rotator and tensioned drive spring to facilitate a perpendicular injection needle movement, combined with a medicament container holder that acts as a transfer element, ensuring precise penetration and dose delivery with minimal components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the needle is moved along an inclined guide to perform penetration, then the penetration function is achieved, but the needle bends and may be damaged
Solution Approach 1:
The needle assembly is divided into two separate functional parts: a penetration needle part for skin penetration and an injection needle part for medicament delivery. This segmentation allows each part to be optimized for its specific function without compromising the other, eliminating the bending issue that occurred when a single needle had to perform both functions along an inclined guide.
Solution Approach 2:
The injection needle part is extended perpendicular to the penetration needle part, creating a two-dimensional angular arrangement (approximately 90 degrees). This dimensional change allows the injection needle to extend outward in a direction perpendicular to the skin surface after penetration, avoiding the need for the needle to bend along an inclined guide while maintaining both penetration and injection functions.
2Volume of moving object
If the device is made compact to be worn under clothes, then the device is less visible, but the number of components increases
Solution Approach 1:
The penetration needle part and injection needle part are merged into a single integrated needle assembly that performs both penetration and injection functions. The medicament container holder is also integrated with the needle assembly, creating a compact unified structure that reduces the overall number of separate components while maintaining compact device size for wearability.
Solution Approach 2:
The needle assembly serves multiple functions: the penetration needle part performs skin penetration, the injection needle part delivers medicament, and the integrated holder accommodates the medicament container. This multi-functionality reduces the need for separate components, allowing the device to remain compact while performing all necessary functions.
3Reliability
If the injection needle part is extended perpendicular to the penetration needle part, then the needle does not bend during penetration, but the device height increases
Solution Approach 1:
The injection needle part is nested within or alongside the penetration needle part in a compact angular arrangement. The medicament container holder is integrated with the needle assembly, with components nested or arranged in space-efficient configurations. This nesting allows the perpendicular extension of the injection needle without significantly increasing the overall device height, maintaining a low profile suitable for wearing under clothes.
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 compact, efficient, and reliable medicament delivery system that maintains a low profile, ensures accurate needle penetration, and reduces the risk of component damage, while allowing for a seamless dose delivery process.
Implementation Method 1
a drive mechanism using a rotator and tensioned drive spring
Data Source
AI summary
The present application relates to a medicament delivery device comprising a housing, a medicament container holder arranged to accommodate a medicament container, a needle assembly comprising an injection needle part and a penetration needle part, wherein the extension of the injection needle part and the extension of the penetration needle part are angled generally 90 degrees, a penetration mechanism arranged to move the needle assembly in a direction generally coinciding with the extension of the injection needle part between an initial position of the injection needle part inside said housing to a penetration position with the injection needle part extending outside said housing; a medicament container connection mechanism arranged to move the medicament container holder and the medicament container in a direction generally coinciding with the penetration needle part for creating a flow passage from the interior of the medicament container to an outlet of the injection needle part.