Abstract: A head massager includes a helmet (10) having a first parallel hoop (11) and a second parallel hoop (12) connected to each other for forming a ring surrounding the user's head. The helmet (10) has a first meridian hoop (21) and a second meridian hoop (22) connected to each other to form an arc structure and hang the head massager on user's head. The distance adjustment devices (3) are provided to connect the first parallel hoop (11), the second parallel hoop (12), the first meridian hoop (21), and the second meridian hoop (22) together for adjusting the size of the helmet (10) to provide a comfortable fit to user's head.

Abstract: A head massage device with distance adjustable mechanisms, comprises a helmet (10) and a massage unit. The helmet (10) includes a first longitudinal shell (11), a second longitudinal shell (12), a first latitudinal shell (21), a second latitudinal shell (22), and three distance adjustable mechanisms (3). Each of the distance adjustable mechanisms (3) includes a base (31), a transmission gear (32), an adjusting knob (34), an end cover (35), and a restoring elastic member (33). The massage unit includes massage plates (30,40,50,60,70), massage airbags (901,902,903,904,905), an air pump (200), electric valves (106,109), and a control unit (20) with a control circuit. The shells can move close to or far away with each other by means of the distance adjustable mechanisms, so as to allow for adjustment of the size of the helmet.