Needle Unit Rubber Seal for Dermatology Injection
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Solution Overview
Problem
Conventional dermatological liquid injection apparatuses fail to effectively block blood and liquid mixtures from remaining in the device when using a disposable needle unit, leading to potential bacterial infections and issues with continuous liquid supply due to mechanical connections and clogging.
Innovation Solution
A dermatological liquid injection apparatus with a rubber member integrated into the needle unit to block blood and liquid mixtures from flowing into the device, combined with a cam-driven mechanism and a cap unit that allows for smooth liquid discharge through multiple holes, ensuring airtight sealing and preventing bacterial infections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a disposable needle unit is used, then bacterial infection risk is reduced, but blood and liquid mixture still flows into the device body through mechanical connection
Solution Approach 1:
A rubber member is introduced as an intermediary sealing element between the disposable needle unit and the device body. This rubber member forms a tight seal that prevents blood and liquid mixture from flowing into the device body through the mechanical connection, while not interfering with the disposable nature of the needle unit.
Solution Approach 2:
The rubber member acts as a flexible sealing film that conforms to the connection interface between the needle unit and device body. This flexible sealing structure effectively blocks the passage of blood and liquid mixture while maintaining the mechanical connection functionality.
2Productivity
If medicine is discharged between needle outer circumference and through hole, then liquid injection is achieved, but clogging stops liquid supply requiring new needle unit
Solution Approach 1:
The liquid discharge function is segmented into multiple pathways: the original through hole and additional liquid discharge holes formed in the needle. This segmentation ensures that if one pathway becomes clogged, liquid can still be discharged through other pathways, maintaining continuous liquid supply.
Solution Approach 2:
The needle structure is modified by forming additional discharge holes, changing the geometric parameters of the needle to provide multiple liquid discharge pathways. This parameter change increases the reliability of continuous liquid supply.
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 apparatus effectively prevents bacterial infections by blocking blood and liquid mixtures from entering the device and ensures continuous liquid supply by using a rubber member to seal the needle unit, maintaining hygiene and operational efficiency.
Implementation Method 1
a rubber member installed to the needle unit, for blocking blood and liquid mixture which are discharged from a skin of a patient and flow into the needle unit, from flowing to the body unit
Data Source
AI summary
The present invention relates to a needle unit for injecting liquids such as medicine or tattooing pigment spread to a skin, into the skin, and a dermatological liquid injection apparatus using the same. The present invention includes a body unit including a driving device, a cam member rotated by the driving device, and a connecting member reciprocally driven by the cam member; a needle unit detachably mounted to a front end of the body unit; and a rubber member installed to the needle unit, for blocking blood and liquid mixture which are discharged from a skin of a patient and flow into the needle unit, from flowing to the body unit during a medical procedure.