A shock-proof device disposed in a buckle includes at least a latch member for engaging a tongue so as to latch the tongue; a release button for releasing the tongue from the latch member; and an inertia lever with a rotation shaft rotatably arranged for preventing the release button from moving at least in a release direction of the release button by abutting against the release button. EL devices, TFTs, data lines, scanning lines, and variable bias lines are disposed in a matrix form. Each of the number of the linear-shaped layout features within the gate electrode level layout of the restricted layout region is rectangular-shaped. The printing unit prints the adjustment test image generated by the generation unit.