Prefilled Two-Component Mixing Syringe Kit With Sealed Needle Space
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Solution Overview
Problem
Conventional prefilled syringe kits expose the syringe barrel, plunger, drug container, and connecting portions to the outside, leading to a risk of leakage of drug or liquid components during storage and preparation of the injection solution, especially when the needle is pulled out after mixing.
Innovation Solution
A two-component-mixing prefilled syringe kit design where a syringe barrel and container are held by a holding member, with a needle cap and space-forming body that seals the seal member from the outside, preventing leakage by forming a sealed space around the piercing point, and a lock mechanism to maintain this state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the injection needle penetrates the seal member to transfer liquid from container to syringe barrel, then the mixing function is improved, but the risk of liquid leakage to outside increases
Solution Approach 1:
The needle cap serves as an intermediary component between the injection needle and the external environment. It includes a through-hole that guides the injection needle while maintaining a sealed space between the seal member and the needle cap's front surface, preventing liquid from leaking to the outside during and after the penetration process.
Solution Approach 2:
The sealed space formed by the needle cap and seal member creates a preliminary barrier against liquid leakage before the injection needle is fully withdrawn. This pre-established sealed environment prevents the harmful effect of liquid dripping or leaking to the external environment.
2Ease of operation
If the syringe barrel and container are exposed to outside for easy access, then the ease of operation is improved, but the risk of drug or liquid leakage increases
Solution Approach 1:
The needle cap is nested within the holding member structure, creating a hierarchical arrangement where the needle cap's sealed space is contained within the overall device architecture. This nested structure allows the sealed compartment to remain accessible while preventing leakage to the external environment.
3Object-affected harmful factors
If the needle cap covers the injection needle tip, then the leakage prevention is improved, but the complexity of the device structure increases
Solution Approach 1:
The needle cap provides localized sealing only at the critical area where the injection needle penetrates the seal member. Rather than enclosing the entire syringe and container, the sealing function is applied locally at the penetration point, reducing overall structural complexity while maintaining effective leakage prevention.
Solution Approach 2:
The needle cap appears to be a thin-walled structure that forms a sealed space without requiring heavy or complex materials. This thin-film approach creates an effective barrier against leakage while minimizing the added weight and complexity of the device.
Data Source
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AI summary
In a two-component-mixing prefilled syringe kit for preparing an injection solution by mixing a drug component in a syringe barrel and a liquid component in a container, when the injection needle pierced by the seal member of the container outlet is pulled out after preparation of the injection solution, a leaking to the outside of the remaining liquid in the container is effectively prevented. Comprise a syringe barrel in which an injection needle is attached on one end, a plunger is inserted slidably through the opening on the other end, and the solid or liquid component constituting the injection solution is filled, and a container in which an outlet is sealed by a seal member that can be pierced by the injection needle, and the liquid component constituting the injection solution is filled, and a holding member which holds the syringe barrel so that the syringe barrel is movable along the axial direction with the tip of the injection needle facing the outlet of the container, and a space-forming body which forms a space facing the surface of the seal member in a space that is sealed from the outside, and the space-forming body is formed of a material that can be pierced by the injection needle at the portion facing the tip of the injection needle along the barrel axis direction of the syringe barrel.