Double-Chamber Syringe Sealing for Closed Medicine Transfer
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Solution Overview
Problem
Existing closed-type medicine liquid transfer devices face challenges such as high cost, complex structure, difficult operation, and incomplete leak-proofing, posing risks to healthcare workers and limiting their widespread adoption in medical settings.
Innovation Solution
A closed type medicine liquid transfer device with double-chamber internal circulation, featuring a double-chamber syringe, dispensing needle assembly, and syringe needle sealing assembly, allowing for automatic or manual air pressure adjustment and ensuring fully-closed medicine preparation and transfer, with a simplified structure for easy assembly and low cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If facilities such as purification rooms and biological cabinets are built to reduce medicine leakage risk, then the safety of medical workers is improved, but the investment cost increases significantly
Solution Approach 1:
The device divides the medicine transfer system into separate functional components: a sealed syringe barrel, a dedicated needle assembly with integrated seal, and a connection interface. This segmentation allows each component to be optimized for its specific function while maintaining overall system safety at low cost.
Solution Approach 2:
The invention employs a disposable sealed syringe-needle assembly that can be discarded after single use, eliminating the need for expensive reusable purification equipment. The low-cost disposable design ensures safety without requiring significant investment in infrastructure.
2Reliability
If the American BD company's closed type configuration and transportation system is introduced, then the leakage risk is reduced by 50% to 80%, but the structure becomes complex and operation becomes complicated
Solution Approach 1:
The invention merges the syringe barrel, piston, needle assembly, and sealing mechanisms into a single integrated closed-type device. This consolidation achieves leakage reduction without the structural complexity of multi-component systems, as all elements work together within one unified design.
Solution Approach 2:
The closed-type syringe-needle assembly is designed to perform multiple functions: sealing the medicine, maintaining pressure balance, enabling safe transfer, and allowing disposal. This multi-functionality reduces the need for separate specialized equipment, simplifying both structure and operation while maintaining reliability.
3Ease of manufacture
If air bags are used for balancing air pressure in medicine liquid transfer devices, then the cost is reduced and use convenience is improved, but the air bag structure becomes prone to breakage and detachment
Solution Approach 1:
The invention extracts the air bag component entirely from the system and replaces it with a rigid piston mechanism for pressure balancing. This elimination of the fragile air bag removes the source of breakage and detachment problems while maintaining the essential pressure balance function through a more durable mechanical means.
Solution Approach 2:
The entire syringe-needle assembly is designed as a disposable unit, eliminating the need for durable reusable air bags. The low-cost disposable design accepts the single-use nature of the device while avoiding the reliability issues associated with reusable flexible components like air bags.
4Ease of manufacture
If air bags are used for pressure balancing, then cost and use convenience are improved, but medicine liquid infiltration into the air bag channel causes blockage and leakage risk
Solution Approach 1:
The invention removes the air bag and its associated channels from the system, replacing them with a piston-based pressure balancing mechanism. This extraction eliminates the channel blockage problem entirely, as there is no flexible bag with channels that can be infiltrated by medicine liquid.
Solution Approach 2:
The invention uses a simplified rigid piston structure that copies the pressure-balancing function of the air bag without replicating its vulnerable channel structure. The piston provides the same pressure regulation effect through a solid, blockage-resistant mechanism.
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
The device achieves excellent leak-proofing, minimizes medicine leakage risk, and provides convenient use at a low cost, facilitating widespread adoption in medical settings.
Implementation Method 1
an elastic member arranged coaxially with the dispensing needle and provided between the closing member and the needle seat and used for providing axial elastic support to the closing member
Implementation Method 2
The closing member is made of an elastic material... under an elastic force of the elastic material, the closing member tightly wraps a front end part of the dispensing needle and seals front channel openings
Data Source
Figure 1a~1b
Figure 2a~3c
Figure 4a~4c
AI summary
Disclosed in the present disclosure are closed type medicine liquid transfer device and system with double-chamber internal circulation. The medicine liquid transfer device includes a double-chamber syringe (10), a dispensing needle assembly (20), and a syringe needle sealing assembly (30). The product of the present disclosure features an exquisite structural design and easy assembly, enables fully-closed medicine preparation and transfer, and allows automatic or manual adjustment and balance of the air pressure inside the medicine container in use, thereby minimizing the risk of medicine leakage and providing an excellent leakproof effect, while having advantages of low cost, high convenience of use, and the like.