Patent ID: 9523533
Filing Date: 2016-12-20
CPC Classification: A47B,F16H,F25D

Claim Text:
1. A refrigerator comprising: a main body including a storage chamber; a rail housing mounted on a side wall of the storage chamber; a rack gear provided at a lower part of the rail housing, the rack gear including a plurality of teeth arranged in a front to rear direction of the storage chamber; a storage box configured to be withdrawn from or inserted into the storage chamber; a rail device connected to the storage box and including a pinion gear that moves together with movement of the storage box, wherein movement of the pinion gear is guided by the plurality of teeth of the rack gear; and an idle gear including a plurality of teeth arranged adjacent to one another in the front to rear direction, each of the plurality of teeth of the idle gear having a width orthogonal to the front to rear direction that is smaller than a width orthogonal to the front to rear direction of at least one of the plurality of teeth of the rack gear.