A force retention mechanism by MR Spring for walking support

In recent years, the number of elderly persons and lower limb disabled people has increased and most of them need a cane or a wheelchair to support their walk in their daily lives. Even though the cane is quite common and widely used it has the disadvantage of putting a large load on the upper limbs. In this study, we aim to develop an assistive tool in the form of a robotic assisted cane to support walk. We propose a novel actuator for the walking cane with a force retention mechanism by integrating MR (Magneto-rheological) fluid and a spring (MR Spring). MR fluid is a functional fluid which rheological characteristics change according to the applied magnetic field.