Abstract: A drum support includes a seat having first and second end walls spaced along an axis and a bottom wall interconnected between the first and second end walls. The bottom wall includes a cord hole adjacent the first end wall. A space is defined between the first and second end walls and the bottom wall. The first end wall includes a first support. The second end wall includes a second support. A stop is provided on top of the second support. A spool is rotatably received in the space and includes first and second axles on two ends thereof. The first axle is rotatably supported by the first support. The second axle is rotatably supported by the second support. The stop prevents upward movement of the second axle to assure smooth rotation of the spool. Thus, winding/unwinding of the cord is reliable, preventing undesired entanglement of the cord.

Abstract: A guiding block for pulling a window curtain comprises a pulling plate, a left wheel seat, a plurality of rolling balls, and a right wheel seat. A confining cap is formed between the right wheel seat and the rolling balls. The primary body of the confining cap is a circular plate with a through hole on the center thereof. Claws with respective to the gaps between each two rolling balls are axially extended from the circular plate on the inner side of the confining cap. Not only the rolling action is smooth, but also the friction and collision between two rolling balls is prevented. Other then noises from frictions and collisions are reduced, the lifetime of the window curtain is prolonged. The circular groove of the convex tube on the right wheel seat is enforced into the rib on the inner rim of the convex tube on the left wheel seat so as to form a buckling state for combining the left wheel seat. Thus, sliding therebetween is seldom occurred and the stability of the combination thereof is increased.