Wiper unit

A wiper unit comprising:

• a wiping body extending in a band shape;
• a housing on which the wiping body is placed and which is provided so as to be movable in a predetermined direction;
• a drive mechanism that moves the housing in the predetermined direction;
• and
• a transmission mechanism that converts a moving force of the housing in the predetermined direction into a moving force for moving the wiping body,
• wherein
• the housing is configured to move in the predetermined direction between a standby position and a wiping position where a wiping operation is performed,
• the housing includes a conveying roller that conveys the wiping body by rotation via fixing a tip of the wiping body,
• a conveyance mechanism includes a rack gear disposed along the predetermined direction and a pinion gear meshing with the rack gear,
• the transmission mechanism is capable of transmitting rotation of the pinion gear to the conveying roller,
• the rotation of the conveying roller is restricted when the wiping body is fed to a proximal end,
• the rack gear is configured to be movable in the predetermined direction to a side opposite to the wiping position, an end opposite to the wiping position in the predetermined direction is connected to an elastic member support portion via an elastic member,
• the elastic member is configured in a state of applying an elastic force to the rack gear in the predetermined direction to a side of the wiping position,
• wherein the wiper unit further comprises a detection mechanism configured to detect a movement of the rack gear in a case when the housing is moved integrally with the rack gear via the rack gear in the predetermined direction to the side opposite to the wiping position while in a state where a rotation of the conveying roller is restricted.