Cartridge changing device

摘要

A cartridge changing device comprises a plurality of insertion detecting switches each for detecting an insertion of a cartridge into each holder. If a cartridge is detached from one holder due to a careless operation by an user during a movement of the holder, the cartridge changing device detects the detachment of the cartridge and then putts the holder back into position, thereby preventing damage to the device and cartridge. Furthermore, when a cartridge is inserted into a holder free of a cartridge through an insertion opening of another holder, in which another cartridge is being played, lies just above the former holder in a downward and slanting direction, projecting parts of the former holder, which are inserted into square holes of the open/close door, receive the front end of the inserted cartridge. Thus, the projecting parts prevent the open/close door from being bent.