Sheet conveying apparatus and printer

A sheet conveying apparatus comprising:

• a roller for conveying a sheet along a conveyance path;
• a first sensor holder including a first sensor element that faces a first surface of the sheet when the sheet is conveyed, the first sensor holder being movable along a first direction that is perpendicular to the conveyance path;
• a second sensor holder including a second sensor element that faces a second surface of the sheet when the sheet is conveyed, the second surface being opposite to the first surface, the second sensor holder being movable along the first direction;
• an interlocking member mechanically connected to the first sensor holder such that the interlocking member and the first sensor holder move concurrently in opposite directions along the first direction;
• a connecting member that is bent to partially surround the conveyance path and connects the interlocking member and the second sensor holder such that the interlocking member and the second sensor holder move concurrently in opposite directions along the first direction;
• and
• a pinion gear by which the interlocking member is connected to the first sensor holder, wherein
• the pinion gear meshes with a rack of the first sensor holder that extends along the first direction and a rack of the interlocking member that extends along the first direction.

A printer comprising:

• a roller for conveying a sheet along a conveyance path;
• a print head for printing an image on the conveyed sheet;
• a first sensor holder including a first sensor element that faces a first surface of the sheet when the sheet is conveyed, the first sensor holder being movable along a first direction that is perpendicular to the conveyance path;
• a second sensor holder including a second sensor element that faces a second surface of the sheet when the sheet is conveyed, the second surface being opposite to the first surface, the second sensor holder being movable along the first direction;
• an interlocking member mechanically connected to the first sensor holder such that when the first sensor holder translates in one direction along the first direction, the interlocking member concurrently translates along the first direction in a direction opposite to said one direction of the first sensor holder;
• and
• a connecting member that is bent to partially surround the conveyance path and connects the interlocking member and the second sensor holder such that when the interlocking member translates in one direction along the first direction, the second sensor holder concurrently translates along the first direction in a direction opposite to said one direction of the interlocking member.