Auto-folder type cellular phone with variable opening and closing velocity

An auto-folder type cellular phone with a variable opening and closing velocity, comprising:

• a main body with a pair of hinge shafts at one side, two hinge shafts being opened to face each other at a predetermined distance;
• a folder disposed between the pair of hinge shafts, having a cylindrical housing whose both sides are opened;
• a first coupler and a second coupler for adjusting a position for the folder to be opened and a position for the folder to be closed;
• an elastic member for providing an elastic force to make the first coupler and the second coupler coupled closely to each other;
• a fixed resistance with a predetermined resistance value for receiving a battery voltage supplied from a battery;
• a plurality of voltage-dividing resistances for dividing the battery voltage given that the voltage-dividing resistances are connected to the fixed resistance;
• a sliding switch for connecting the voltage-dividing resistances respectively to the fixed resistance in series by making a sliding motion;
• and
• a motor driving unit for opening and closing the folder centering around the hinge shafts by varying a direction of a divided voltage of the battery voltage taken in the motor, wherein the divided voltage varies responsive to the sliding switch at an operation signal given by a subscriber of the auto-folder type cellular phone.