Liquid jetting apparatus, power transmission apparatus, and recording apparatus

A liquid jetting apparatus, comprising:

• a head unit having a liquid jetting surface with nozzles;
• a cap configured to cover the nozzles in a state of being in contact with the head unit;
• a cap lifter configured to move the cap between a capping position in which the cap is in contact with the head unit to cover the nozzles and an uncapping position in which the cap is separated from the head unit;
• a motor;
• a driven device;
• a first transmission gear configured to transmit power of the motor to the cap lifter;
• a second transmission gear configured to transmit the power of the motor to the driven device;
• and
• a movement gear connected to the motor and configured to be moved between a position at which the movement gear engages with the first transmission gear and a position at which the movement gear engages with the second transmission gear depending on a rotation direction of the motor,
• wherein a maximum friction force between the first transmission gear and the movement gear obtained in a state where the first transmission gear is engaged with the movement gear is greater than a maximum friction force between the second transmission gear and the movement gear obtained in a state where the second transmission gear is engaged with the movement gear.

A power transmission apparatus, comprising:

• a motor;
• a first driven device and a second driven device;
• a first transmission gear connected to the first driven device and configured to transmit power of the motor to the first driven device;
• a second transmission gear connected to the second driven device and configured to transmit the power of the motor to the second driven device;
• and
• a movement gear connected to the motor and configured to be moved between a position at which the movement gear engages with the first transmission gear and a position at which the movement gear engages with the second transmission gear depending on a rotation direction of the motor,
• wherein a maximum friction force between the first transmission gear and the movement gear obtained in a state where the first transmission gear is engaged with the movement gear is greater than a maximum friction force between the second transmission gear and the movement gear obtained in a state where the second transmission gear is engaged with the movement gear.