BACK REST RECLINING APPARATUS FOR WATER PRESSURE MASSAGE MACHINE

摘要

The present invention relates to an apparatus for adjusting backrest angle of hydraulic pressure massage machine, comprising a driving axis which pushes or pulls the lower part of the backrest and controls the angle of the backrest; a linear motor which transfers the driving axis to the front and back direction; and a pair of 4 joint links which are connected to the backrest and a foot supporting frame and are allowed to mutually move the same.