Drug Delivery Door Spring for Clear Partial-Closure Indication
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Solution Overview
Problem
Existing medical device doors often fail to provide clear visual or tactile indications of their closed position, leading to potential misuse or malfunction during drug delivery, especially when partially closed.
Innovation Solution
A biasing element is used to push the door to a perceptibly open position when it approaches the closed position, providing a clear visual or tactile indication of non-closure, and a locking mechanism ensures the door remains closed for proper drug dispensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a door is designed to close automatically or be easily closed, then ease of operation is improved, but clear indication of closed position deteriorates
Solution Approach 1:
The patent employs a visual indicator mechanism that changes the apparent position or appearance of the door to provide clear feedback. The indicator may use color changes, position changes, or other visual transformations to distinctly show when the door is fully closed versus partially closed, resolving the ambiguity that occurs with simple automatic closing mechanisms.
Solution Approach 2:
The patent introduces an intermediary indicator mechanism that mediates between the actual door position and the user's perception of door closure. This indicator serves as a separate communication channel that clearly signals the closed state, independent of the door's physical position alone, thereby solving the information loss problem while maintaining ease of operation.
2Ease of operation
If a door allows partial closing position, then ease of operation is improved, but reliability deteriorates due to potential misuse
Solution Approach 1:
The patent implements a feedback mechanism through the visual indicator that provides real-time information about door closure status. The indicator clearly distinguishes between partial and full closure positions, giving users feedback that confirms proper closure has been achieved. This feedback loop ensures reliability by preventing misuse while maintaining operational flexibility during the closing process.
Solution Approach 2:
The patent uses the visual indicator system to preemptively communicate the closure status before the door is fully closed. By providing advance visual feedback about the closure progress and final status, the system prevents potential misuse by making the closure state unambiguous, thereby ensuring reliability while allowing flexible operation.
3Reliability
If a door provides clear visual indication of position, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent designs the visual indicator mechanism to serve multiple functions: it indicates door closure status, provides feedback on closure progress, and may also serve as part of the door assembly structure itself. By making the indicator multi-functional, the patent achieves reliable visual indication without proportionally increasing device complexity, as the indicator performs several communication and structural roles simultaneously.
Solution Approach 2:
The patent combines the visual indicator mechanism with existing door components rather than adding a completely separate system. The indicator may be integrated into the door assembly, hinge mechanism, or housing structure, merging multiple functions into a unified design. This integration approach provides reliable visual indication while minimizing the increase in overall device complexity by sharing components and structures.
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
Ensures that the door is fully closed and locked, preventing drug delivery until the door is properly shut, thereby enhancing the reliability and safety of drug delivery devices.
Implementation Method 1
a biasing element connected to said housing or said door, wherein said biasing element is positioned to interfere with the movement of said door by applying an opening force to open said door when said range of movement of said door is near said closed position
Implementation Method 2
a locking mechanism between said door and said housing, said locking mechanism applies a locking force on said door greater and in an opposite direction to the force applied by said biasing element
Data Source
AI summary
A method for visually indicating that a door of a drug delivery device is open is described. A closing force to move the door is received. Then, it is detected that the door is not closed. A biasing element pushes the door to a perceptibly open position with an opening force when the door reaches the last 30 degrees of rotation of toward closure or when the door reaches the last 30% of range of movement during the rotation of the door. The perceptibly open position of the door is indicated relative to a drug delivery device housing.