Folder driving device for portable device

A folder driving device for a portable device, comprising:

• first and second shaft support parts formed on a body element of the portable device;
• a hinge housing connected to a folder of the portable device and positioned between the first and second shaft support parts;
• a hinge connector adapted to connect one of the shaft support parts to the hinge housing to allow a relative rotation therebetween;
• a pair of cam couplers coupled to the other one of the shaft support parts in the hinge housing in a manner such that one cam coupler is prevented from being rotated and is allowed to be moved in an axial direction and the other cam coupler functions to determine folder opening and closing positions;
• driving means for providing driving force to the other cam coupler to allow the folder to be automatically opened and closed;
• and
• an elastic member placed between one cam coupler and the hinge housing to cause the cam couplers to be brought into close contact with each other to thereby be moved in the axial direction.

A folder driving device for a portable device, comprising:

• first and second shaft support parts formed at one end of a body element of the portable device, wherein said first and second shaft support parts are spaced apart from each other by a predetermined distance and opened at their respective ends facing to each other;
• a cylindrical hinge housing connected to a folder of the portable device, wherein said cylindrical hinge housing is positioned between the first and second shaft support parts and opened at both ends thereof;
• a pair of cam couplers respectively including a hinge cam which is coupled to the second shaft support part in a manner such that it is prevented from being rotated and is allowed to be moved in an axial direction and a hinge shaft which cooperates with the hinge cam to determine folder opening and closing positions;
• an elastic member for applying elastic force to the hinge cam to bring the hinge cam into close contact with the hinge shaft;
• and
• driving means including a power generator for generating rotation force, a reducer connected to the power generator to transmit rotation force to the hinge shaft and reduce a rotation speed of the power generator as desired, and a power transmission arrangement for connecting the power generator and the reducer.