Patent ID: 8506190

Claim:
A cutter mechanism for cutting a recording sheet, the cutter mechanism comprising: a fixed blade formed into a plate shape and having opposite ends and two parallel sides, one of the two parallel sides serving as a cutting edge and the other of the two parallel sides serving as a root portion; a movable blade substantially V-shaped in top view, the movable blade being slidably arranged with respect to the fixed blade and configured to ride on the fixed blade during sliding to cut the recording sheet while the recording sheet is located between the fixed blade and the movable blade; a biasing member mounted on a base portion for biasing the fixed blade in a direction away from the base portion; and a fixed blade holder supporting the fixed blade at a position away from the base portion so as to cause the cutting edge to swing up and down about the root portion and so as to permit the opposite ends of the fixed blade to be pushed down at least in the direction of the base portion, the fixed blade holder having a wall portion protruding from the base portion for positioning the fixed blade in a sliding direction of the movable blade by coming into contact with the root portion of the fixed blade, a first regulating member configured to regulate lifting of the cutting edge of the biased fixed blade, and a second regulating member configured to regulate lifting of the root portion of the biased fixed blade in a state in which a predetermined gap is formed between the base portion and the root portion of the fixed blade.