Patent ID: 8662140
Filing Date: 2014-03-04
Classification: E05F,E05Y

Abstract:
1. A composite pull-chain disc mechanism with a brake function for a door operator ( 1 ), the door operator ( 1 ) mounted on a base plate ( 2 ) comprising a central shaft ( 10 ), one end of which is provided with an output wheel ( 15 ) for rotating a winding shaft ( 6 ) for a door curtain of slats, and the other end of which is provided with the composite pull-chain disc mechanism ( 30 ) for rotating or braking the central shaft ( 10 ); wherein the composite pull-chain disc mechanism ( 30 ) comprises: a pull-chain disc ( a pair of hubs comprising an inner hub ( a movable disc ( at least one torsional spring ( a pair of bolt rods (