Safety loading unit for ceiling track with easy to use latching

A ceiling track system for suspension of a travelling curtain comprising:

• a. a fixed track section for attaching to a ceiling surface;
• b. a hinged track section connected to said fixed track section by a hinge, the hinged track section adapted to be lowered from the ceiling for loading and unloading of the travelling curtain;
• c. a latching mechanism for latching the hinged track section to the ceiling in continuation of the fixed track section, the latching mechanism comprising:
• a receiver bracket for attaching to one of the ceiling surface and a wall surface, the receiver bracket comprising:
• a bottom wall with an oval shaped aperture having a center, a long axis, and a short axis, and
• two vertical elastically deformable side walls, each of the two side walls being parallel to the long axis of the oval aperture and has a vertical gap,
• a lock knob comprising:
• an oval shaped portion defining a center, a long axis, and a short axis,
• a pair of tips protruding from the oval shaped portion in a direction of the long axis,
• wherein the lock knob is adapted to rotate about the center by action of a removable mechanical actuating key;
• wherein the latching mechanism comprises a locked position and an unlocked position, when said long axis of said lock knob is aligned with said long axis of said aperture, the latching mechanism is in the unlocked position, when said long axis of said lock knob is perpendicular to said long axis of said aperture, the latching mechanism is in the locked position;
• in the unlocked position, the lock knob passes through the aperture, the lock knob is configured to rotate about the center causing the pair of tips to force the two side walls outward during rotation and when the lock knob reaches the locked position, the tips seat in the vertical gaps formed in the two sidewalls such that when said tips seat in said gaps, an audible sound is produced.