Patent ID: 7784369

Claim:
An inspection device for inspecting a headrest return prevention mechanism, wherein the headrest return prevention mechanism is provided with a fixed portion mountable to a backrest frame and a movable portion mountable to a headrest, wherein the movable portion can return to a normal position after being displaced from the normal position in which the headrest can not be fixed to a fixed position in which the headrest can be fixed while the head of a seated person is supported, comprising: a base; fixing means for fixing the fixed portion to the base; displacing means for applying a load to the movable portion so as to displace the movable portion from the normal position to the fixed position; position measuring means for measuring the fixed position when the movable portion is displaced from the normal position to the fixed position; and determining means for determining if the movable portion has been displaced to a predetermined fixed position or not on the basis of the fixed position measured by the position measuring means.