Abstract: Disclosed is a coupling device for coupling first and second units with each other in a portable apparatus in which the first and second units are folded or unfolded with respect to each other about a first rotation axis. The coupling device includes first and second supporting bodies coupled with each other to be relatively rotated about the first rotation axis and to be folded or unfolded with respect to each other. The coupling device further includes a first rotating member coupled with the first supporting body to be relatively rotated with respect to the first supporting body about a second rotation axis The coupling device comprises a second rotating member coupled with the second supporting body to be relatively rotated with respect to the second supporting body about a third rotation axis.

Abstract: The hinge device includes a housing (30), a cam (60), a cam follower (40) to interact with the cam, and a resilient member (80). The housing contains the cam, cam follower and resilient member. The cam moves linearly, and the cam follower rotates. The cam has a peak (76), a valley (77), and a straight line section (78) in which the cam follower holds its position.

Abstract: The present invention provides a hinge for coupling a stationary member with a movable member which can be relatively moved to folded and unfolded positions with respect to the stationary member. The hinge includes a housing, a cam member having a cam, a cam follower member provided with a cam follower portion interacting with the cam, and a resilient member for urging the cam member. The cam member can perform a linear motion within the housing and the cam follower member can perform a rotational motion. The cam member includes a cam surface, the cam surface includes peaks and valleys, and each valley is provided with two or more stopping grooves. The cam follower member includes protrusions protruding toward the cam surface and ends of the protrusions can be inserted into the stopping grooves.

Abstract: A hinge device for coupling two units movable to folded and unfolded positions in an apparatus with the two units such as a portable radiotelephone includes a housing, a first rotating member contained in the housing to rotate about a first rotation axis, and a second rotating member rotatable about a second rotation axis. The hinge device includes a first linearly moving member that is linearly movable due to the rotation of the first rotating member, and a second linearly moving member that is linearly movable due to the rotation of the second rotating member. The hinge device includes a first resilient member for urging the first linearly moving member against the first rotating member, and a second resilient member for urging the second linearly moving member against the second rotating member.

Abstract: Disclosed is an apparatus and a method for opening a cover of a mobile phone, by which the cover of the mobile phone is easily opened, thereby providing convenience for the users of the mobile phone. The apparatus has an operation assembly 150 directly inserted in a pivoting section 4 of a cover 2 of a mobile phone 100, and a button 5 disposed at a predetermined portion of a phone body 1. The operation assembly 150 may be contained in a housing 13, which is inserted in the pivoting section 4. When a user pushes the button 5, the operation assembly 150 releases a compression force and a torsion force applied to a torsion-compression spring. Then, the force of restitution of the spring generates a pivotal movement of the cover 2 by a torsional operation, thereby opening the cover 2.

Abstract: A hinge for coupling a body and a button cover of a radiotelephone has a can, a first member, a second member and a spring. The can has an partially closed end and an open end. A retaining protrusions are provided to close the open end by way of bending. The first member has a shaft protruding through the partially closed end of the can and two protrusions defining a cam follower. The second member has a cam portion interacting with the cam follower. The cam portion includes at least a peak and two valleys separated by the peak and slopes connecting the peak and the valleys. The spring pushes the second member toward the first member. The first member, the second member and the spring are contained within the can in turn. Then, the protrusions are bended.