Patent ID: 8740827
Filing Date: 2014-06-03
Classification: A42B,A61H

Abstract:
1. A head massager comprising a helmet and a massage device disposed on the helmet, the helmet having a front shell and a rear shell which is movable relating to the front shell, wherein: further comprising an adjustment device, the rear shell having a shell cavity, two ends of the front shell being plug-connected with two ends of the rear shell, the adjustment device comprising a positive rotatable knob, a fixing pole, a winding ring, two bundles of pulling ropes and a reverse locking device for preventing the knob from rotating reversely, the fixing pole being fixed on the rear shell, both the knob and the winding ring being loosely sleeved on the fixing pole through through holes, the knob being provided with a loop of first bulged teeth around the through hole thereof and the winding ring being provided with a loop of second bulged teeth around the through hole thereof correspondingly, the first bulged teeth and the second bulged teeth having a mating status and a separated status, one end of each bundle of pulling rope being connected to one end of the front shell, and the other end of each bundle of pulling rope being connected to the winding ring so that both the two bundles of pulling ropes pull the front shell while the first bulged teeth engages with the second bulged teeth and the knob rotates along a positive direction.