Winding device and printing device with a moveable arm

A printing device comprising:

• a print head configured to print on an elongated medium;
• a winding roller configured to wind the medium after printing;
• a pressing member that extends along a rotation shaft of the winding roller and that is configured to press the medium toward the winding roller at a position where the medium is wound by the winding roller;
• a guide shaft member that extends along the rotation shaft of the winding roller, that has a fixed position with respect to the winding roller, and that is configured to guide the medium to the winding roller before the medium is wound up by the winding roller;
• and
• an arm that extends in a direction intersecting an extension direction of the pressing member and that is configured to support the pressing member, wherein
• the arm is configured to pivot about a shaft coaxial with a shaft of the guide shaft member, and
• the arm is configured to expand and contract in an overall length of the arm in an extension direction of the arm.