Patent ID: 8625211

Claim:
A variable magnification device ( 100 ) comprising: a rotation bunch ( 120 ) which has a ring shape conforming to the circumference of a barrel ( 210 ) of a telescopic sight ( 200 ) and includes a bent end ( 110 ) formed monolithically on one side of the circumference of the rotation bunch ( 120 ); a rod ( 130 ) which is rotatably connected to the bent end ( 110 ) and is rotatable in the longitudinal direction of the barrel ( 210 ); wherein the bent end ( 110 ) comprises: a body ( 111 ) which projects upwardly from the rotation bunch ( 120 ), provides a space in which a tail end of the rod ( 130 ) is accommodated, and includes an opened upper portion and one opened lateral perpendicular to the longitudinal direction of the barrel ( 210 ); and a shaft ( 112 ) which traverses two laterals adjacent to the one opened lateral, wherein the rod ( 130 ) is adapted to be rotated around the shaft ( 112 ), and wherein the body ( 111 ) comprises: a first side wall ( 114 ) and a third side wall ( 116 ) 25 which are parallel with the longitudinal direction of the barrel ( 210 ) and a through hole ( 113 ) is respectively formed on the first and third side walls ( 114 ) and ( 116 ) such that the shaft ( 112 ) is horizontally fixed to the first and third side walls ( 114 ) and ( 116 ); and a second side wall ( 115 ) connecting the first and third side walls ( 114 ) and ( 116 ) providing the space, the second side wall ( 115 ) supporting the rod ( 130 ) when the rod ( 130 ) is being rotated.