Patent ID: 6240998
Filing Date: 2001-06-05
Classification: E06B,Y10S

Abstract:
An opening and closing device for a window blind, in which louvers are hanged on carriers respectively carried by runners in a runner group traveling along a rail for opening and closing the group of louvers, and the carriers are rotated by a tilt shaft extending through the runner group for varying orientation of the louvers in unison, comprising:a runner driving endless belt for driving said runners;runner connecting portions provided with a given interval on said runner driving endless belt;belt connecting pins provided in respective runners and movable between engaging positions to engage with said runner connecting portions and retracted positions released away from said runner connecting portions;springs for biasing respective of said belt connecting pins to said engaging positions for engaging with said runner connecting portion;receptacle openings on rear surfaces of respective runners; andbelt connecting pins actuating projections provided on front surface of said runners and entering into said receptacle openings for driving said belt connecting pins to said retracted position against a force exerted by said springs when a preceding runner is stacked on a following runner.