The customer of massage chair is expanding day by day from middle age to all ages. In 2018, the market size was 700 billion KRW, an increase of 30 times over 10 years. However, most related SMEs suffer from excessive competition by the market monopoly of some major companies. In this situation, in order for a related company to survive, it is necessary to steadily research and develop new products. Founded in 2009, company L produces massage chairs for health and relaxation of customers. L’s products use a sound wave vibration module that is favorable for human body, unlike other products that use vibration motor type. However, frequent breakdowns of massage chair due to the vulnerability of plate (leaf) springs, which play an important role in sound wave vibration modules, made sap its competitiveness. In this paper, we propose a method to design desirable plate spring structure by sequentially experimenting with five different plate springs. The results of this study are expected to contribute to improve the quality of plate spring and the reliability of sound wave vibration module. In the future, it is necessary to find a way to use it in the development of foot massage or scalp management device as well as continuous research to find optimal plate spring structure through various analysis.

1. 서 론
2. 이론적 배경
    2.1 용어설명
    2.2 기존연구 고찰
3. 연구 설계 및 방법
    3.1 연구 설계
    3.2 연구방법
4. 연구결과
    4.1 각 모델에 대한 구조해석
    4.2 구조해석 결과
    4.3 주파수 변경에 따른 성능시험 결과
5. 결 론
References

• Chang-Gyum Kim(한밭대학교 스마트생산경영공학과) | 김창겸
• Soo-Yong Park(한밭대학교 스마트생산경영공학과) | 박수용
• Eun-Hyeon Jo(한밭대학교 스마트생산경영공학과) | 조은현
• Dong-Hyung Lee(한밭대학교 스마트생산경영공학과) | 이동형 Corresponding Author