Recording medium cartridge having an accommodation portion for a noncontact-type memory

A recording medium cartridge comprising:

• a noncontact-type memory having an IC section for storing information and performing signal processing, and an antenna section for performing data transmission by transmitting and receiving signals, data being read from and written to said noncontact-type memory in a noncontact manner;
• and
• an accommodation portion formed inside the recording medium cartridge, which accommodates said noncontact-type memory at least partially, and which includes a first portion corresponding to said noncontact-type memory and a second portion in the vicinity of said noncontact-type memory;
• wherein said accommodation portion is recessed one step relative to a surrounding portion,
• wherein said first portion comprises at least one projection for retaining said noncontact-type memory,
• wherein said at least one projection extends from one of a first and a second movement prevention ribs,
• wherein said first and second movement prevention ribs are formed discrete from side wall portions of said recording medium cartridge, and
• wherein said first and second movement prevention ribs are formed at a front side where a tape loading device enters in a central area of the recording medium cartridge.

A recording medium cartridge which accommodates a magnetic tape wound around each of first and second winding hubs, comprising:

• first and second tape movement prevention ribs formed inside the recording medium cartridge, which prevent windings of said magnetic tape wound around said first and second winding hubs from moving freely, respectively;
• a noncontact-type memory having an IC section for storing information and performing signal processing, and an antenna section for performing data transmission by transmitting and receiving signals, data being read from and written to said noncontact-type memory in a noncontact manner;
• and
• an accommodation portion formed by said first and second tape movement prevention ribs, inside the recording medium cartridge, to retain said noncontact-type memory,
• wherein said first and second tape movement prevention ribs are formed in a curved shape between said first and second winding hubs so as to approach each other and conform to a circumferential surface of each of said windings of said magnetic tape having a maximum diameter,
• wherein said accommodation portion is formed in an approaching area where said first and second movement prevention ribs approach each other, and
• wherein said first and second movement prevention ribs are formed at a front side where a tape loading device enters in a central area of the recording medium cartridge.