Cutter and recorder

A recorder, comprising:

• a printing unit, wherein the printing unit includes
• a print head configured to perform printing on a recording medium;
• and
• a platen roller configured to rotate on a platen rotary shaft to draw and press the recording medium against the print head;
• a shaft support member that rotatably supports the platen rotary shaft;
• a cutter;
• and
• a drive mechanism for driving the cutter,
• wherein the cutter includes
• a movable blade that is coaxially rotatable with the platen rotary shaft, the movable blade including
• a body part on which a blade edge is formed;
• and
• an arm part that extends from a longitudinal end of the body part, that is rotatably attached to the platen rotary shaft, and that is connected to the drive mechanism to be driven to rotate on the platen rotary shaft so as to move the blade edge in an arc of a circle concentric with the platen rotary shaft;
• a fixed blade configured to form a cutting part by coming into sliding contact with the movable blade that has moved in the arc;
• and
• a blade pressure generation part configured to generate a blade pressure between the movable blade and the fixed blade by urging at least one of the movable blade and the fixed blade toward the other of the movable blade and the fixed blade in the cutting part, and wherein the body part of the movable blade is curved along the arc.