Patent ID: 7353048

Claim:
A mobile terminal comprising a first, a second, and a third part, a first hinge pivotally interconnecting the first and second parts, and a second hinge pivotally interconnecting the second and third parts, each of the first and second hinges comprising: a helical spring having a longitudinal axis, the spring comprising one or more wound strands of material, each strand having two ends, a first hinge part extending into the helical spring, contacting an inner part of the helical spring at a first position or area along the longitudinal axis, and a second hinge part contacting the one or more strands of the helical spring at a position or area different from the first position or area, in each hinge, the spring facilitating, that: rotation of the first hinge part in a first direction around the longitudinal axis and in relation to the second hinge part will provide a first, lower friction between the first hinge part and the helical spring, and rotation of the first hinge part in a second direction, being opposite to the first direction, around the longitudinal axis and in relation to the second hinge part, will provide a second, higher friction between the first hinge part and the helical spring, wherein: in the first hinge, the first hinge part is connected to or attached to one of the first or the second part of the terminal and the second hinge part is connected to or attached to the other of the first and the second part of the terminal, in the second hinge, the first hinge part is connected to or attached to one of the second or the third part of the terminal and the second hinge part is connected to or attached to the other of the second and the third part of the terminal, and the terminal further comprises, for each hinge, release means for increasing a diameter of the helical spring at the first position or area in order to reduce the second, higher friction between the first hinge part and the helical spring to a third friction during rotation of the first hinge part in the second direction.