PURPOSE: To miniaturize a drive device by setting the rotary center of an opening means at the deeper back of the cartridge storage position of a drive device and constituting the opening means by means of a main lever and an auxiliary lever.
CONSTITUTION: The rotary center of the opening means which mechanically opens a shutter by using a cartridge 21 is set at the deeper back than the cartridge storage position in the drive device and the means consists of the main lever 24a and the auxiliary lever 24b, both of which can rotate. Since the opening means of the shutter consists of two levers 24a and 24b, the shutter 22 can smoothly be opened without resistance with respect to the cartridge 21 with a large opening width even if the rotary center of the lever 24a is positioned at the deeper back of the drive device. Thus, the space of a shutter opening device can be reduced.
HAMADA TSUTOMU
ITO FUJIO
TAKEDA RITSU
SAITO MINORU
MATSUSHITA COMMUNICATION IND
NIPPON TELEGRAPH & TELEPHONE