Covering of building opening

摘要

A covering of a building opening includes a rail, a first sash having a guiding slot, a second sash hinged with the first sash and having a center of rotation at an end thereof, a pulley assembly, and a restricting assembly. The pulley assembly is movably received in the rail and has a rod. The rod has a protrusion section extending out of the rail, and the protrusion section enters and leaves the guiding slot while the pulley assembly is moving. The restricting assembly has a moving member and a locking base. The moving member is provided on one of the first sash and the second sash, and the locking base is provided on the other. The moving member is moved by the rod and engages the locking base when the rod leaves the guiding slot.

主权项

1. A covering of a building opening, comprising:
a rail; a first sash having a guiding slot which has an end opening; a second sash hinged with the first sash with an end thereof, wherein the second sash pivots with another end thereof as a center of pivoting; a pulley assembly movably received in the rail and having a rod, wherein the rod has a protrusion section exposed out of the rail, and the protrusion section enters and leaves the guiding slot through the end opening while the pulley assembly is moving; and a restricting assembly having a moving member and a locking base, wherein the moving member is provided on either the first sash or the second sash, and the locking base is correspondingly provided on the other; the moving member is contacted and moved by the rod to engage the locking base when the protrusion section of the rod leaves the guiding slot.