A mechanism for rotating at least a first and a second housing element of a device with respect to one another, where the first and second housing elements have a common axis of rotation, which is substantially perpendicular to a front surface of the device, said mechanism comprising: a tension device having a first end coupled to the first housing element, and a second end coupled to the second housing element; a mechanical stop, which limits rotational movement, when the first and second housing elements are at or near a rotatably opened position; and an engagement member, engaged to one of the first and second housing elements and releasably engaged with the other one of the first and second housing elements, which limits rotational movement, when the first and second housing elements are at or near a rotatably closed position; said mechanism characterized by: when the first and second housing elements are at or near a rotatably closed position, the tension device extends between the first end and the second end along a path having a first portion, which extends at least partly around said axis of rotation at a distance away from the axis of rotation and a second portion, which extends along at least part of the length of the first housing element, such that the tension device is preloaded, the tension device is configured to enable relative rotation of the first and second housing elements toward the opened position as a result of the force exerted by the preloaded tension device when the first and second (220 housing elements are released from the rotatably closed position. a tension device having a first end coupled to the first housing element, and a second end coupled to the second housing element; a mechanical stop, which limits rotational movement, when the first and second housing elements are at or near a rotatably opened position; and an engagement member, engaged to one of the first and second housing elements and releasably engaged with the other one of the first and second housing elements, which limits rotational movement, when the first and second housing elements are at or near a rotatably closed position; said mechanism characterized by: when the first and second housing elements are at or near a rotatably closed position, the tension device extends between the first end and the second end along a path having a first portion, which extends at least partly around said axis of rotation at a distance away from the axis of rotation and a second portion, which extends along at least part of the length of the first housing element, such that the tension device is preloaded, the tension device is configured to enable relative rotation of the first and second housing elements toward the opened position as a result of the force exerted by the preloaded tension device when the first and second (220 housing elements are released from the rotatably closed position. when the first and second housing elements are at or near a rotatably closed position, the tension device extends between the first end and the second end along a path having a first portion, which extends at least partly around said axis of rotation at a distance away from the axis of rotation and a second portion, which extends along at least part of the length of the first housing element, such that the tension device is preloaded, the tension device is configured to enable relative rotation of the first and second housing elements toward the opened position as a result of the force exerted by the preloaded tension device when the first and second (220 housing elements are released from the rotatably closed position.