Medicament Delivery Device with Activation Unit for Leakage Prevention
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Solution Overview
Problem
Existing medicament delivery devices, such as auto-injectors, are difficult to operate and often result in medicament leakage outside the user's body, leading to inaccurate dosing.
Innovation Solution
A medicament delivery device comprising a holding unit, a driving unit, and an activation unit that allows for precise control of a cannula to penetrate a septum within the device, preventing leakage and ensuring accurate dosing, integrated with an electronic device like a cell phone for enhanced functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the needle is arranged to penetrate the septum of the medicament container prior to penetrating the user's tissue, then the device structure is simplified, but medicament leakage occurs outside the user's body resulting in inaccurate dosing
Solution Approach 1:
The cannula is pre-positioned within the activation unit in a concealed state before use. The activation unit preliminarily protects the cannula and controls its exposure timing, ensuring the needle penetrates tissue first before medicament is administered, preventing leakage while maintaining structured design
Solution Approach 2:
The activation unit serves as an intermediary component between the driving unit and the cannula. It controls the sequence of operations by first allowing tissue penetration, then subsequently enabling medicament flow after activation, thus preventing premature leakage while maintaining a manageable device structure
2Manufacturing precision
If the proximal end of the cannula protrudes out of the activation unit before the distal end penetrates the septum, then medicament leakage is prevented, but the device operation becomes more complex
Solution Approach 1:
The activation unit is designed to automatically control the cannula's proximal end movement and positioning. Upon activation, the unit self-manages the sequence of exposing the proximal end while maintaining concealment until proper tissue penetration occurs, eliminating the need for manual coordination and simplifying user operation despite the complex sequence
Solution Approach 2:
The device incorporates mechanical feedback through the activation unit that responds to the penetration event. The unit detects when the distal end has successfully penetrated the septum and automatically adjusts the proximal end positioning accordingly, ensuring accurate dosing while providing intuitive operation through automatic response to user actions
3Reliability
If the cannula is concealed in the activation unit before use, then medicament leakage is prevented, but the device requires additional components increasing complexity
Solution Approach 1:
The activation unit combines multiple functions into a single integrated component: it conceals the cannula, controls its exposure timing, manages the proximal end positioning, and coordinates with the driving unit. This merging approach prevents leakage while avoiding the need for separate components for each function, thereby reducing overall device complexity despite the added reliability features
Data Source
AI summary
A medicament delivery device includes a holding unit (5), a driving unit (7) releasably held by the holding unit, an activation unit (6) used to release the driving unit from the holding unit, and an injection unit (8) to be moved by the driving unit. The injection unit includes a hub (85) held by the driving unit, a cannula (86) fixed to the hub and a container (83) slidably connected to the hub. After the driving unit is released, the proximal end of the cannula protrudes out of the activation unit before the distal end of the cannula fluidly communicates with the container. The medicament delivery device is combined with an electronic device in an assembly. When a casing cap of the assembly is removed, the electronic device or an app in the electronic device or a function of the electronic device is automatically activated to wirelessly communicate with another electronic device.