Automatic Injection Device Pneumatic Unsealing Mechanism
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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, and high-pressure air source where the actuating unit selectively blocks and releases the air source, allowing the high-pressure air to be easily released without additional hand tools by sliding the air source to hit a piercing needle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a high-pressure air source is sealed before assembly in the pneumatic device, then the device can be pre-assembled and stored ready for use, but the user needs additional hand tools to unseal the air source which reduces ease of operation
Solution Approach 1:
The device enables self-service by allowing the user to unseal the high-pressure air source using the actuating unit that is already part of the device structure. The actuating unit pushes the high-pressure air source against the piercing needle, automatically breaking the seal without requiring external hand tools. This resolves the contradiction by making the unsealing operation self-contained within the device itself.
Solution Approach 2:
The actuating unit serves as an intermediary mechanism between the user and the high-pressure air source seal. Instead of the user directly manipulating the seal with hand tools, the actuating unit mediates the action by pushing the air source against the piercing needle, thereby breaking the seal. This intermediary mechanism eliminates the need for separate unsealing tools while maintaining pre-assembly benefits.
2Productivity
If the high-pressure air source is sealed before assembly, then the device can be prepared in advance, but the unsealing process requires manual intervention with hand tools which increases operation time
Solution Approach 1:
The device performs the unsealing operation automatically through its own actuating unit, eliminating the need for users to reach for external hand tools. The actuating unit pushes the high-pressure air source against the piercing needle integrated into the device, enabling rapid self-unsealing. This significantly reduces the time lost during the unsealing process while preserving the benefits of advance preparation.
3Reliability
If additional hand tools are required to unseal the high-pressure air source, then the sealing mechanism can be secure, but the device complexity increases and ease of operation decreases
Solution Approach 1:
The invention merges the unsealing function with the existing actuating unit and piercing needle structure of the device. The actuating unit, already necessary for fluid injection, is also used to push the high-pressure air source against the piercing needle for unsealing. This consolidation eliminates the need for separate hand tools, maintaining seal integrity while reducing overall device complexity.
Solution Approach 2:
The actuating unit serves multiple functions: it acts as both the fluid injection actuator and the unsealing mechanism. By making the actuating unit universal, the device eliminates the need for dedicated unsealing tools. The piercing needle also serves dual purposes as both a sealing barrier and a breaking point for controlled unsealing, thereby maintaining reliability while simplifying the device.
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 the need for manual unsealing, enhancing user experience and efficiency.
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 and a high-pressure air source. The high-pressure air source is mounted slidably in the barrel. The actuating unit is mounted in the sleeve and barrel and selectively blocks the high-pressure air source. When the user needs to release the high-pressure air in the high-pressure air source, the user press the actuating unit to allow 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.