A laser scanning indicia reading apparatus comprises one or more adjustable aperture assemblies for adjusting the diameter of a laser beam and adjustable lens assemblies for adjusting the distance of a laser beam waist. Inert gas molecules pass into the enclosure through an opening near the first electrode and from the enclosure through an opening near the second electrode. If the maximum value is changed by the zigzag width range setting apparatus 9 during the sewing machine stitch action, zigzag stitch in accordance with the changed maximum zigzag width is performed. When the safety controller determines a rollover situation, the seat moving mechanism moves the seat in a substantially downward direction from an initial position to increase a head clearance for a vehicle occupant seated in the vehicle seat.