Automatic Injection Device Pneumatic Unsealing Mechanism
Solution Overview
Problem
Pneumatic medical devices require users to manually unseal high-pressure air sources, which is inconvenient, especially for medical applications where ease of use is crucial.
Innovation Solution
An automatic injection device with a sleeve, actuating unit, barrel, high-pressure air source, and driven unit, where the actuating unit drives the high-pressure air source to slide and release air without additional tools by pressing the actuating unit, allowing the air to escape through a piercing needle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a hand tool is used to unseal the high-pressure air source, then the high-pressure air can be released, but the operation becomes inconvenient and complex
Solution Approach 1:
The unsealing function is merged with the actuating unit by integrating a piercing needle directly into the actuating mechanism. When the user presses the actuating unit, the piercing needle automatically pierces the seal of the high-pressure air source, eliminating the need for separate hand tools and reducing operational steps.
Solution Approach 2:
The high-pressure air source is designed to be self-unsealed through the automatic piercing mechanism. The seal is automatically pierced when the actuating unit is pressed, allowing the system to perform the unsealing operation itself without requiring external hand tools or additional manual intervention.
2Reliability
If additional hand tools are required to unseal the high-pressure air source, then the sealing function is maintained, but the overall device complexity increases
Solution Approach 1:
The sealing and unsealing functions are merged into a single integrated system. The seal remains intact during storage and transport, but the actuating unit contains a piercing needle that automatically pierces the seal when activated, combining the sealing protection with the unsealing capability in one device.
Solution Approach 2:
The hand tool is extracted from the system and its function is transferred to the actuating unit itself. The piercing needle, which was previously a separate tool, is now integrated into the actuating mechanism, eliminating the need for external tools while maintaining the sealing reliability.
3Reliability
If the high-pressure air source is sealed before assembly, then the high-pressure air can be stored safely, but manual unsealing is required which reduces ease of use
Solution Approach 1:
The high-pressure air source is pre-sealed before assembly to ensure safe storage and transport. The seal is designed to be automatically pierced by the actuating unit when needed, so the preliminary sealing action is complemented by an automatic unsealing mechanism that eliminates manual intervention.
Solution Approach 2:
The piercing needle acts as an intermediary between the actuating unit and the high-pressure air source seal. It provides a controlled mechanism to breach the seal safely and automatically when the actuating unit is pressed, bridging the gap between the sealed storage state and the active 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
Enables convenient and tool-free release of high-pressure air, facilitating the injection of fluid in medical devices without manual intervention.
Implementation Method 1
the compressed air in the high-pressure air source could come out to pushes the liquid out
Data Source
AI summary
An automatic injection device for fluid has a sleeve, an actuating unit, a barrel with a piercing needle, a high-pressure air source and a driven unit. The actuating unit is mounted in the sleeve. The high-pressure air source and the driven unit are mounted slidably in the barrel. The barrel, the high-pressure air source and the driven unit are first mounted in the sleeve to be ready for use. When the user needs to release the high-pressure air in the high-pressure air source, the user press the actuating unit to drive the driven unit to slide. Then the driven unit also drives the high-pressure air source to slide until the high-pressure air source hits the piercing needle. Therefore, the high-pressure air in the high-pressure air source is easily released by actuate the actuating unit without additional hand tools.