Syringe Attachment Sealing Element Actuation Mechanism
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Solution Overview
Problem
Existing syringe and cartridge attachments that use piercing membranes can release particles into the injection liquid, potentially contaminating the patient when the membrane is pierced.
Innovation Solution
An attachment with a sealing element and an actuating device that closes or opens a passage without piercing the material, using a conical or cylindrical section and an actuating area to exert force, ensuring the passage is sealed or opened without releasing particles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a piercing membrane is used to close the syringe or cartridge, then the interior can be sealed and protected from contamination, but particles can be torn loose when the membrane is pierced, entering the syringe interior and potentially being administered to a patient
Solution Approach 1:
The harmful piercing membrane is completely removed from the system. Instead of using a membrane that must be pierced, the invention employs a removable cap with a screw thread that threads onto the syringe body, eliminating the source of particle contamination while maintaining sealing capability
Solution Approach 2:
A threaded connection interface acts as an intermediary between the cap and syringe body. The external threading on the syringe body and matching internal threading in the cap create a mechanical engagement system that provides both sealing and particle-free operation
2Object-affected harmful factors
If a piercing membrane is used to seal the syringe, then contamination is prevented, but the sealing element must be pierced to access the interior, which can release particles
Solution Approach 1:
The piercing membrane is extracted from the design entirely. The cap system provides sealing through a threaded connection and removable cap structure, eliminating the need for membrane piercing and associated particle generation
Solution Approach 2:
The cap is designed as a disposable component that is discarded after a single use or when the syringe contents are exhausted. This eliminates the need for complex reusable sealing mechanisms while ensuring consistent particle-free operation throughout the product lifecycle
3Ease of operation
If an actuating device exerts force on the sealing element to close the passage, then the passage can be sealed, but the sealing element material may be damaged or particles released
Solution Approach 1:
The mechanical piercing action is replaced with a threaded mechanical engagement system. The actuating element threads onto the externally threaded syringe body, providing controlled opening and closing actions without damaging the sealing element or generating particles
Solution Approach 2:
The sealing mechanism transitions from a static pierced membrane to a dynamically controllable threaded system. The passage can be opened or closed by rotating the actuating element, allowing precise control of the sealing state without mechanical damage to sealing components
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to an attachment (1) or a cartridge comprising a sealing element (5) having an opening (9) for a medium located in the syringe or cartridge or to be introduced into the syringe (3) or cartridge. The attachment (1) is characterised by an actuating device (11) which, in a first functional position, exerts a force on the wall of the opening (9) in such a way that the opening (9) is closed, and leaves the opening (9) open in a second functional position.