Sheet conveyor apparatus

A sheet conveyor apparatus comprising:

• a sheet support portion configured to support a stack of sheets thereon;
• a first roller configured to feed sheets supported on the sheet support portion in a conveyance direction;
• a second roller disposed downstream of the first roller in the conveyance direction and configured to be rotatable about a rotation axis extending in a direction perpendicular to the conveyance direction and to separate the sheets one by one;
• a holder configured to be supported swingably about the rotation axis and to support the first roller to be rotatable;
• a wall disposed opposite to the sheet support portion with the holder interposed therebetween;
• and
• a pressing member disposed between the wall and the holder and configured to press the first roller toward the sheet support portion, the pressing member comprising;
• a holding member movably supported by the holder to make contact with the wall;
• and
• a spring disposed between the holding member and the holder and configured to apply a biasing force that causes the holding member and the holder to move away from each other while maintaining a state in which the holding member contacts the wall regardless of the holder swinging about the rotation axis, wherein
• the holding member comprises a first contact portion projecting toward the wall, the first contact portion having a first contact surface,
• the wall comprises a second contact portion projecting toward the sheet support portion and having a second contact surface disposed opposite to the first contact portion,
• the first contact surface is configured to slide in contact with the second contact surface corresponding to the holder swinging about the rotation axis, and
• the first contact surface and the second contact surface have shapes which cause the length of the spring to be kept constant regardless of the holder swinging about the rotation axis.