Disclosed is an electronic handheld device. The device has a first panel, a second panel rotatable relative to the first panel about an axis and a hinge. The hinge has first and second hinge members. The first member is engaged with the first panel. The second member is engaged with the second panel and rotatable relative to the first member about the axis. The first panel has a hole generally extending along the axis. The first hinge member is configured to linearly move within the hole. The first hinge member has an outer wall that has a curved surface and a key. The curved surface is a circular arc having a radius from the axis when viewed along the axis. The key is located outside an imaginary circle, a portion of the circumference line of which overlaps the circular arc.