Syringe Needle Cover Cutout for Fluid Entry Detection
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Solution Overview
Problem
Existing syringe designs push out a large amount of fluid when confirming if air has been removed from the injection needle, which is inefficient and wasteful.
Innovation Solution
A syringe design featuring a transparent or translucent needle base with strategically placed cutouts in the injection needle cover allows for instant visual identification of fluid entry into the needle, enabling immediate cessation of fluid discharge and reducing fluid loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the injection needle cover is made opaque, then the structure is simple and manufacturing is easy, but the fluid entry into the needle cannot be visually identified
Solution Approach 1:
The injection needle cover incorporates a transparent window that allows visual detection of fluid entry into the needle. This transparent portion enables the user to observe the fluid level and entry point without compromising the overall structural simplicity or manufacturing ease of the cover.
2Reliability
If fluid discharge continues until air is confirmed removed, then complete air removal is achieved, but excessive fluid is pushed out causing waste
Solution Approach 1:
The transparent window in the injection needle cover provides real-time visual feedback on fluid entry into the needle. This allows the user to immediately see when fluid has entered the needle during the air removal process and stop the plunger accordingly, preventing excessive fluid discharge while ensuring complete air removal.
3Difficulty of detecting and measuring
If the needle base is transparent, then fluid entry can be visually identified, but the structural strength may be reduced
Solution Approach 1:
The injection needle cover is designed with a localized transparent window rather than being completely transparent. This local transparency allows visual detection of fluid entry while maintaining structural strength in other critical areas of the needle base and cover structure.
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
This design effectively suppresses the amount of fluid pushed out from the injection needle by allowing for immediate visual confirmation of fluid entry, thereby minimizing fluid loss during the air removal process.
Implementation Method 1
the needle base is transparent or translucent, and the injection needle surrounding part has at least one cutout in a part of the injection needle surrounding part facing the needle base and covering the needle base such that the needle base can be identified from outside
Data Source
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Figure 3(A)~3(C)
AI summary
The present invention suppresses the amount of fluid pushed out from an injection needle when confirming whether air has been pushed out of the injection needle. Provided is a syringe that comprises: a cylinder 20; an injection needle 22; a needle base 24; an injection needle cover 26; and a plunger rod 28. The needle base 24 communicates between the inside of the cylinder 20 and the inside of the injection needle 22. The injection needle cover 26, when extended from a folded state, surrounds the injection needle 22. The injection needle cover 26 comprises an injection needle surrounding part. The injection needle surrounding part has at least one cutout 130 in a section facing the needle base 24 and covering the needle base, such that the needle base 24 can be identified from the outside.