Input device and portable equipment using the same

The present invention relates to an input device used for various types of electronic equipment including portable phones and mobile communication devices. More particularly, it relates to an input device that can be used for input and output of sound, and portable equipment using the device. Disclosed are a compact input device that offers a wide space for input operation and portable equipment using the device. The input operation section of the input device is not only for data entry by users, but also for transmitting sound vibration. The coupling section of the device is coupled to the input operation section to form a closed cavity between the two sections. The sound vibration transmitting section, which is formed adjacent to the closed cavity, conveys sound vibration, via the closed cavity, from the input operation section to the sound vibration transmitting section (or vice versa). The portable equipment includes the aforementioned input device and a sound vibration element. In the equipment, the sound vibration element is coupled to the sound vibration transmitting section of the input device. Sound vibration is transmitted, via the closed cavity and sound vibration transmitting section of the input device, from input operation section to the vibration element (or vice versa).