Cannula Device Universal Attachment Mechanism
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Solution Overview
Problem
Existing delivery devices for therapeutic substances like insulin are often limited by their design, which makes them sensitive to movement and restricts the flexibility of connector direction, leading to increased manufacturing costs and reduced user convenience.
Innovation Solution
A cannula device with a housing and membrane configuration that allows for universal attachment to different base parts, enabling orthogonal or inclined insertion and facilitating easy positioning with attaching means on the proximal side, such as pivoting hooks or adhesive surfaces, for secure and flexible integration into various delivery devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional delivery device with a pivoting member is used to allow connector connection from different directions, then the device provides flexibility in connector orientation, but the device becomes very sensitive to movement and a small tuning closes the drug delivery
Solution Approach 1:
The device is divided into separate functional modules: a base part with a cannula, a receiving part with a receiving portion, and a connector part. The receiving portion is designed to receive the connector in a specific orientation, separating the orientation constraint function from the drug delivery function. This segmentation allows the connector to be oriented correctly by design rather than relying on sensitive pivoting mechanisms.
Solution Approach 2:
The receiving portion is designed with an asymmetric geometry that only accepts the connector in one specific orientation. This asymmetric design eliminates the need for pivoting members and ensures that the connector can only be inserted in the correct orientation, thereby preventing sensitivity to movement while maintaining the ability to provide directional control.
2Reliability
If each infusion set utilizes a specific set of guiding and locking means for a specific connector, then the connection is secure and precise, but the device complexity increases and manufacturing costs rise
Solution Approach 1:
The receiving portion is designed as a universal component that can accommodate different types of connectors through a standardized receiving geometry. This universal design allows the same base part with cannula to be used with various connector types, reducing the need for multiple specialized guiding and locking mechanisms while maintaining secure and precise connections.
3Ease of manufacture
If a standard cannula component is mass-produced for use in different delivery devices, then manufacturing costs are reduced and production flexibility is enhanced, but the device must be adaptable to different insertion orientations
Solution Approach 1:
The cannula device is designed as a standardized component with a universal interface that can be integrated into different base part configurations. The receiving portion accommodates various insertion orientations through its geometric design, allowing the same standardized cannula component to function in both orthogonal and inclined insertion scenarios, thereby enabling mass production while maintaining adaptability.
4Ease of operation
If attaching means are positioned on the proximal side of the cannula device, then correct positioning is easier and user experience is improved, but the device structure becomes more complex
Solution Approach 1:
The attaching means on the proximal side are designed to automatically engage with the base part when the cannula device is inserted. The geometric features of the receiving portion and attaching means work together to self-align and secure the device in the correct position without requiring additional adjustment mechanisms or complex positioning systems.
Data Source
AI summary
The present application concerns a cannula device for mounting in a base part (9) comprising a housing (Ia, 16) and at least one membrane (4) together defining at least 15 one cavity, the cannula device further comprises a cannula (3) mounted in the housing and being in fluid communication with the at least one cavity, said cannula device is provided with means (5) for attaching the device to the base part (9) on the proximal side of the device.