Wireless communication system and image forming device

An image forming device comprising:

• a device main body in which image forming is carried out;
• a plurality of cartridge accessories insertably and removably mounted at the device main body;
• and
• a wireless communication system including
• at least one main body side antenna disposed at the device main body, and
• tag side antennas attached at the cartridge accessories, two of the tag side antennas are disposed sandwiching and facing the one main body side antenna,
• wherein the tag side antennas are supported by the cartridge accessories such that coil axes of the tag side antennas are substantially perpendicular to a direction of insertion and removal of the cartridge accessories into and from the device main body, and the main body side antenna is supported by the device main body such that a coil axis of the main body side antenna is substantially parallel with at least one of the coil axes of the tag side antennas.

A wireless communication system to be used at a device, the device including a device main body, a plurality of cartridge attachment/detachment portions provided at the device main body, and the plurality of cartridge accessories which are respectively inserted at the cartridge attachment/detachment portions and are insertably and removably mounted thereat, the wireless communication system comprising:

• wireless communication tags attached at the cartridge accessories and each including
• a tag side antenna formed with a conductive member in a coil shape,
• a tag side wireless control section for transmitting and receiving information non-contactingly via the tag side antenna, and
• an information storage device for reading therefrom and writing thereto information in accordance with the tag side wireless control section;
• and
• a wireless communication device disposed at the device main body and including
• a main body side antenna formed with a conductive member in a coil shape, and
• a main body side wireless control section for inputting and outputting information to the tag side wireless control section non-contactingly via the main body side antenna and the tag side antenna,
• wherein the tag side antennas are supported by the cartridge accessories such that coil axes of the tag side antennas are substantially perpendicular to a direction of insertion and removal of the cartridge accessories at the cartridge attachment/detachment portions, and the main body side antenna is disposed at the device main body, such that a coil axis of the main body side antenna is substantially perpendicular to the direction of insertion and removal, wherein the main body side antenna is disposed between a plurality of the cartridge accessories along a direction which is orthogonal to the direction of insertion and removal, and each of a plurality of the tag side antennas that are supported by the plurality of the cartridge accessories faces the main body side antenna, and the main body side antenna faces the tag side antenna.