Abstract: The present invention discloses a curtain ballchain wheel, comprising an outer seat provided with an outer seat plate, an outer seat sleeve extends perpendicularly from the center of the outer seat plate, an outer seat core set comprising outer seat cores extending integratedly from arrow ends and forming seat steps due to dimensional differences in the front ends, wherein the outer seat sleeve is socketingly engaged with a spring, whose ends are provided with a spring leg, respectively, and the outer seat plate perpendicularly extends to form a segment of outer seat collar; a ball seat comprising a seat rim, a seat ring perpendicularly connected with the sear rim, and a seat through hole in the center, wherein a ball chamber to receive a plurality of balls are provided around the seat rim; and an inner socket comprising a inner sleeve and an inner ring of larger outer diameter, wherein an inner hole is provided and the inner wall of the inner sleeve is arranged with different inner diameters to form sleeve s

Abstract: A fixing device in a venetian blind integrally made of high molecular material comprises a cord engaging part, a band passing part, and a core. The cord engaging part is at one side of a base, having two engaging plates oppositely and crossly disposed and a joint to connect with each other. Each of the engaging plates has an engaging groove near the joint thereof, and an engaging chamber is formed in the base. The band passing part is at the other side of the base having two opposite and crossly arranged sticks. An elongated gap formed between each stick and one edge on the base respectively and a bottom gap formed between the bottom part of each stick and the base respectively. The core is at the center of the base is formed at center of the base with a central axial through hole along the base.