Slide unit

A slide unit comprising:

• a fixed rail fixed to a main body and provided with a first accommodation space at an inner side thereof;
• a movable rail connected to a drawer body to allow the drawer body to be pulled out from and pushed into the main body, provided with a second accommodation space at an inner side thereof, and configured to be movable with respect to the fixed rail;
• an inner rail configured such that a first end thereof is inserted in the first accommodation space and a second end thereof is inserted in the second accommodation space, so as to allow the movable rail to be slidable with respect to the fixed rail;
• and
• a plurality of slide balls inserted in the first accommodation space to be disposed between the fixed rail and the inner rail, and inserted in the second accommodation space to be disposed between the movable rail and the inner rail;
• wherein the plurality of slide balls includes first slide balls and second slide balls with different diameters;
• a diameter of each of the first slide balls is larger than a diameter of each of the second slide balls;
• and
• a relationship between a horizontal distance (A′) between centers of the first slide balls, and a vertical distance (B′) between the centers of the first slide balls and centers of the second slide balls satisfies a following equation:
• 0.7
• <
• A
• ′
• B
• ′
• <
• 0.9
• .