A spring unit comprises a continuous coil spring contained within a sleeve of strong, yet flexible, material. The hinge connecting portion is formed of a part of the main body case, and has upper and lower connecting members formed of a part of the upper case and a part of the lower case, respectively. The reference value for controlling the transmission power of the mobile terminal equipment is controlled based on a reception quality of the radio access bearer other than the audio transmission radio access bearer in the silent state.