Journal of Shanghai Jiaotong University ›› 2016, Vol. 50 ›› Issue (02): 182-187.

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Theory and Design of a GravityDriven Orthotic Device for Sitting Posture

ZHOU Junfan,LUO Yun   

  1. (State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China)
  • Received:2014-12-11 Online:2016-02-29 Published:2016-02-29

Abstract: Abstract: The working principles and limits of existing orthotic devices for sitting posture were analyzed. A novel way to help users easily maintain healthy sitting posture was proposed. By using fourbar linkage, body weight was transformed into torques to rotate the pelvis. A biomechanical experiment was conducted to acquire the relationships between external torques and rotation angles of the pelvis while sitting. Based on the experimental results, the prototype of the gravitydriven orthotic device was built. Its feasibility was proved by a verification experiment. The results showed that this device could help users easily maintain ideal pelvic incidence while relaxing low back muscles.

Key words: Key words: low back pain, sitting posture, ergonomics, mechanism design, biomechanical experiment

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