MANUAL OPENING AND CLOSING APPARATUS FOR SHUTTER

摘要

PURPOSE: A manual opening/closing device of a shutter, capable of open and close using less power, is provided to enable a user to stably open and close a shutter as desire angel. CONSTITUTION: A manual opening/closing device of a shutter comprise a chain pulley(34), a driving shaft and a rotation limiter. The chain pulley is rotated with a chain(35) releasing . The driving shaft is combined with the chain pulley to rotate. The rotation limiter connects the driving shaft and the chain pulley to deliver the torque of the chain pulley to a principal axis of a barrel(14) in which the shutter is rolled.