Patent ID: 6978478

Claim:
A mounting unit for mounting a main apparatus of a head mounted apparatus on the front side of the head of a user, comprising: a front frame whose front portion is fixed to the main apparatus, and whose right and left portions extend in a front-and-rear direction, a rear frame which is connected to the front frame at its right and left portions and is capable of moving in the front-and-rear direction with respect to the front frame, and has a portion that presses the back of the user's head, knob members which are provided on both the right and left portions of the rear frame, when the knob members are pushed backward the rear frame moves backward with respect to the front frame, lock mechanisms which prevent the backward movement of the rear frame, release buttons which allows a lock release operation of the lock mechanisms to be performed, wherein, each of the knob members is arranged under both the frames, and, each of the release buttons is arranged such that the user may push with a finger on each of the knob members in order to move the rear frame backward with respect to the front frame.