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| Theory and Design of a GravityDriven Orthotic Device for Sitting Posture
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| ZHOU Junfan,LUO Yun
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| （State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering,
Shanghai Jiaotong University, Shanghai 200240, China） |
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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 fourbar 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 gravitydriven 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.
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Received: 11 December 2014
Published: 29 February 2016
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