| abstract |
(57) [Abstract] [PROBLEMS] To provide a small-sized disc cartridge having an electronic circuit portion, which is highly reliable, has a degree of freedom in the arrangement position of the electronic circuit portion, and does not have a large shutter or case shape. That is. A second shutter 50 that opens and closes the terminal insertion opening 32 is provided separately from the first shutter 40 that opens and closes the head opening 31a, and the second shutter 50 is the first shutter 40. The opening operation is performed without interlocking with the opening operation of the above, and the head opening 31a is held in a position where the head opening 31a is not closed in the opened state. , And is urged in the closing direction via the first shutter 40. |