Patent ID: 7130548
Filing Date: 2006-10-31
Classification: G03G

Abstract:
1. A plurality of connected optional apparatuses, each comprising: a sliding member slidable in a direction of connection, wherein said sliding member is in contact with a sliding member of an adjacent one of said plurality of operational apparatuses; and a display member connected to said sliding member, said display member containing a plurality of unique identifiers which are arranged at constant intervals in a sliding direction of said sliding member, wherein, when said plurality of optional apparatuses are connected, a moving amount of said sliding member of each of said plurality of optional apparatuses differs from each other of said plurality of optional apparatuses, thereby displaying a different unique identifier of the display member of each optional apparatus, and wherein, when a total length of said sliding member is represented by L, an interval between adjacent unique identifiers is represented by P, and a length of each of said plurality of optional apparatuses in the direction of connection is represented by H, the following relationship is satisfied: