Needleless Syringe Reciprocating Piston for High-Speed Skin Injection
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Solution Overview
Problem
Existing needleless syringes are limited in their ability to evenly and repeatedly inject a drug over a large area of the skin, causing potential skin tissue damage and discomfort due to the need for multiple reloads.
Innovation Solution
A needleless syringe design featuring a solenoid coil-driven piston that reciprocates forward and backward, using a magnetic force to pressurize and inject a drug, with a nozzle opening/closing valve and a recoil offset mechanism to ensure consistent and high-speed injection without the need for separate loading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a needleless syringe injects a predetermined amount of drug into one part of the skin at a time, then the injection precision is maintained, but the skin tissue damage increases and the productivity decreases due to multiple reloads
Solution Approach 1:
The piston performs periodic reciprocating motions (forward and backward movements) to repeatedly inject the drug multiple times without reloading, achieving high-speed repeated injections while maintaining precision through controlled periodic cycles
Solution Approach 2:
The single-loaded syringe continuously injects the drug multiple times through the reciprocating piston mechanism without interruption or reloading, eliminating idle time and maintaining continuous useful action throughout the injection process
2Productivity
If a needleless syringe is used for repeated injections, then the productivity improves, but the skin tissue damage increases and the reliability decreases
Solution Approach 1:
The syringe is designed as a disposable single-use device that is discarded after one continuous injection session, eliminating cross-contamination risks and ensuring skin safety while maintaining high productivity during the injection period
Solution Approach 2:
The needle is completely removed from the syringe design, eliminating the harmful factor of needle-related skin damage and infection risks while maintaining effective drug delivery through the nozzle mechanism
3Ease of operation
If the piston reciprocates forward and backward using magnetic force, then the ease of operation improves, but the device complexity increases
Solution Approach 1:
The manual mechanical operation of the piston is replaced with an electromagnetic actuation system where solenoid coils generate magnetic forces to automatically reciprocate the piston, improving ease of operation while introducing electromagnetic components
Solution Approach 2:
Magnetic force serves as an intermediary between the electrical control system and the mechanical piston movement, enabling automatic reciprocating motion without direct mechanical connection or manual intervention
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
Enables repeated, high-speed injection of a drug over a wider skin area, reducing user discomfort and eliminating the need for frequent reloading, while also providing adjustable injection amounts and improved convenience through the recoil offset feature.
Implementation Method 1
a moving magnetic body that is long inserted into the body in a longitudinal direction and reciprocates forward and backward by a magnetic force generated when a current is applied to the solenoid coil
Implementation Method 2
a stationary magnetic body that is inserted at a position where the stationary magnetic body is spaced apart from the moving magnetic body backward from the inside of the body and is fixed, is magnetized by a magnetic force generated when a current is applied to the second coil, and pulls the moving magnetic body in a backward movement direction due to electrical attraction
Implementation Method 3
a nozzle portion opening/closing valve that is provided to open/close a passage hole between the nozzle portion and the drug accommodating portion, is pushed by a fluidic pressure applied by the drug from the drug accommodating portion during forward movement of the piston to open the passage hole
Data Source
AI summary
A needleless syringe, according to the present invention can cause a piston for pressurizing and injecting a drug to repeatedly reciprocate forward and backward, and thus can repeatedly inject a predetermined drug at high speed so that multiple injections, rather than a single injection, are possible during a single procedure to a wider range of skin such as that of the face in the fields of skin care and the like, wherein a user can automatically and repeatedly inject a small amount of drug at high speed without separate loading and the needleless syringe includes a recoil offset part for offsetting recoil generated during the advancing and retreating of the piston, and thus can have more improved convenience of use.