Device taking retractable keyboard as activator for answering and hanging up telephone

Abstract

A device taking a retractable keyboard as an activator for answering and hanging up a phone, used in a cellular phone with a retractable keyboard. A contact switch is activated after the keyboard of the cellular phone is drawn out, and thereafter, a voltage signal is changed. The changed voltage signal is transmitted into a central processing unit of the cellular phone. The central processing unit judges that this keyboard drawn-out action is a phone answering if a phone call comes in when the contact switch is activated, and commands the cellular phone to make a connection. The contact switch is also activated when the keyboard is pressed back while the phone is connected, the central processing unit judges this pressed-back action is a phone hanging-up, and commands the phone to terminate the connection. Thereby, it is more convenient in the phone answering and hanging-up.

Dependencies are inferred from the claim text.