1. Chair Balancing Mechanism for Battery Efficiency Group name : 올라가 조 20081972 박경원 20091994 정태산 20102068 이효진 20111974 강석우

2. Contents 1. Motivation 2. Main point 3. Existing design 4. Our design 5. Our advantages 6. Consideration for design 7. Reference

3. 1. Motivation duration time weight price … Electric energy efficiency

4. 1. Motivation Battery efficiency is enormously important for the disabled It is difficult to increase battery efficiency on driving part → chair design

5. 2. Main point Wheelchair seat design for rising the electric energy efficiency

6. 3. Existing design hand-operated

7. 3. Existing design consume a lot of electricity

8. 3. Existing design consume a lot of electricity

9. https://www.youtube.com/w atch?v=CQkKOoztij0 3. Existing design

10. 4. Our design mgh

11. 5. Our advantages

12. 6. Consideration for design 1.Robust design 2.Easy fixed system 3.Gradient control system

13. http://www.kipo.go.kr – 특허청http://www.kipo.go.kr PYH2010041701830001300_P2http://app.yonhapnews.c o.kr/YNA/Basic/Gallery/YIBW_showPhotoNews_New.as px?contents_id=PYH20100417018300013 7. Reference

14. Q&A