Printer

1. A printer, comprising:

a lid part;

a body part;

a control part provided in the body part;

a mark detecting part provided on the lid part and configured to output a mark detection signal in response to detecting a mark added to paper;

a transmission part configured to transmit the mark detection signal from the mark detecting part to the control part and having a slack part; and

a housing part that houses the slack part of the transmission part;

wherein said slack part is extendable and contractible in a direction;

wherein said housing part is extendable and contractible in the direction in which the slack part is extendable and contractible; and

wherein the slack part is housed in the housing part, and wherein a length of the slack part is greater than or equal to a length of the housing part.

2. A printer, comprising:

a body;

a lid provided to the body in a rotatable manner;

a control part provided in the body;

a mark detecting part provided on the lid and configured to output a mark detection signal in response to detecting a mark added to paper;

a housing that is provided between the body and the lid, that is formed in a bellows shape, and that is configured to be extendable and contractible; and

a transmission part configured to transmit the mark detection signal from the mark detecting part to the control part, the transmission part including a slack part that is housed in the housing.

3. The printer according to claim 2 , wherein

the body includes an engaging part; and

the lid includes a rotating shaft that removably engages with the engaging part.