Patent ID: 7854041

Claim:
A mobile radio terminal electronic device comprising: a top half fixedly attached to a top half tube; a bottom half fixedly attached to a bottom half tube; and a hinge connection between the top half and the bottom half, wherein the hinge connection includes: the top half tube; the bottom half tube; and a hinge assembly extending into the top half tube and the bottom half tube; wherein the top half tube and the bottom half tube together extend across substantially all of a hinge connection width of the hinge connection, wherein the hinge connection width is from a first end of the hinge connection to a second, opposite end of the hinge connection, in an axial direction along a longitudinal axis of the tubes; wherein the top half tube rotates about the longitudinal axis relative to the bottom half tube; wherein the hinge assembly includes: a shaft; a collar around the shaft; a detent mechanism that engages to releasably secure the hinge assembly with the top half positioned relative to the bottom half in an open position, and to alternatively releasably secure the hinge assembly with the top half positioned relative to the bottom half a closed position, wherein the detent mechanism includes a protrusion on a first part of the hinge assembly engaging a recess on a second part of the hinge assembly; and a coil spring around the shaft; and wherein the coil spring biases the detent mechanism toward engagement.