Motor unit and conveyance device

A motor unit that can be used in a conveyance device, comprising:

• a drive motor;
• a drive gear;
• an inner tooth train portion having a continuously annular shape;
• and
• a plurality of small gear portions,
• the drive gear being provided on an output shaft of the drive motor,
• wherein the motor unit further includes:
• a motor portion;
• and a gear portion,
• the motor portion including a housing member accommodating at least a majority of the drive motor therein,
• the gear portion including:
• a space surrounded by the inner tooth train portion;
• at least a part of the drive gear in the space;
• and
• the plurality of small gear portions in the space, the plurality of small gear portions being positioned around the drive gear in the space,
• wherein each of the plurality of small gear portions meshes with the drive gear as well as the inner tooth train portion, thereby rotation of the drive gear causing rotation of each of the plurality of small gear portions, and
• wherein at least a part of the gear portion is at a position overlapping the motor portion in plan view,
• wherein the housing member includes a gear accommodation portion that accommodates at least a part of the drive gear and the plurality of small gear portions, and
• wherein the inner tooth train portion is provided on an inner peripheral surface of the gear accommodation portion.