Semi automatic spring

PURPOSE: A semi automatic spring is provided to prevent components from being separated from a panel by semi-automatically closing the panel by tensile force of a spring. CONSTITUTION: A semi automatic spring(100) is composed of first and second fixing units(112,114), a coil spring(120), bent parts(130). The first and second fixing units are respectively fixed to the side surface of panels connected by hinges. The coil spring is integrally formed between the first and second fixing units, and has elastic force. The bent parts are bent between the fixing units and the coil spring, and control tensile force.