A needleless automatic injection syringe (Jet Injector) is a device that delivers drugs into the skin and tissues using high-speed fluid jets without the use of injection needles. Jet Injector's core technology is to penetrate the stratum corneum of the skin by converting pressure energy generated in the driving unit into fluid kinetic energy, and structural loads and dynamic responses generated in this process directly affect the performance and durability of the device. Therefore, the structural mechanical design of the drive unit can be said to be a key factor in securing the reliability and injection accuracy of the Jet Injector. This paper is intended to provide the basis data for the basic design of the drive unit of the "Animal Vaccine-free Automatic Injection Syringe (hereinafter referred to as the "Jet Injector"), and this calculation data provides basic data for the design. Based on this, it is possible to design the drive unit according to various assumptions and given conditions, and the expected performance can be reasonably inferred according to the design.

Abstract
1. 서 론
2. Jet Injector 기술
    2.1 연구 경과
    2.2 구동부 구조역학 이론
    2.3 설계 요구조건 및 해석 가정
    2.4 유한요소해석 적용 방향
3. Jet Injector의 압력 형성을 위한구동부 설계
    3.1 Jet Injector의 기존 설계
    3.2 Jet Injector의 기초 설계를 위한 조건
    3.3 주어진 조건에 따른 기초 설계 결과
    3.4 기초 설계 결과에 따른 스프링 구동부 설계
    3.5 기초 설계 결과에 따른 모터 구동부 설계
4. 결 론
References

• 이정익(INHA Technical College, Dept. of Mechanical Design) | Jeong-Ick Lee Corresponding author