External supporting cover for user device

摘要: An external cover of a user device includes: an upper cover; lower and hinge connecting the covers for pivoting over front surface rear device, wherein opens closes comprises at least two or more folding lines along longitudinal direction such that is divided into three supports when folded each lines, holds on inside surface, slip preventing units are provided end surfaces outside second providing enhanced friction between flat location so maintains stable state in various holding mode facing hinge, respectively, modes.