Patent attributes
A modular frame including a push-button area is provided. The push-button area has a function key hole group, an alphabet key hole group, a number key hole group, a shift key hole, a space key hole, a backspace key hole, and an enter key hole. The shift key hole is located at one side of the alphabet key hole group and has a first processing region. The space key hole is disposed at a bottom end of the push-button area and has second, third, and fourth processing regions. The backspace key hole has a fifth processing region. The enter key hole is located below the backspace key hole and has sixth and seventh processing regions. The first to seventh processing regions may be selectively performed with a process to switch the modular frame to a first, second, or third configuration.