Patent ID: 8077346

Claim:
A gap adjustment apparatus comprising: a recording section; a guide axis that supports the recording section in such a manner that the recording section can move while facing a recording target medium, the guide axis being able to move in such a manner that a gap between the recording section and the recording target medium can be adjusted; a cam section that is either provided directly on the guide axis or provided not directly on the guide axis so as to engage indirectly with the guide axis, the cam section being able to rotate so as to move the guide axis; a rotatable member that rotates together with the cam section; an arm section that is provided either as a part of or on the rotatable member and substantially radiates out from a rotation axis line of the rotatable member; and a rotating section that is brought into engagement with the arm section as the recording section moves in a main scan direction and rotates the rotatable member by transmitting a force to the rotatable member via the arm section, wherein the rotating section has a sliding-contact portion that moves together with the recording section in the main scan direction; and, at the time when the recording section moves in the main scan direction, the arm section slides on the sliding-contact portion in such a manner that the rotatable member rotates.