Most other animatronics have endoskeletons and support structures that makes it nearly impossible for them to be worn like a suit (without causing serious injury or death). Springtrap, on the other hand, was created to be a hybrid between an animatronic and a wearable mascot costume. According to Phone Guy's various calls throughout the week, the mechanical parts inside of Springtrap were designed to be tightly compressed against the outside of the suit, using spring locks to hold them in place, allowing someone to enter and wear the suit. However, anyone in the suit would need to be very cautious, because in the event that the spring locks malfunctioned, all the compressed animatronic parts would quickly shift back into place, severely injuring (and likely killing) whoever was inside the suit. Springtrap's spring mechanisms were faulty to the point that breathing on them lubricated them and made them malfunction, thus making it extremely dangerous to wear and leading to Springtrap being put away in an emergency/storage room in which all customers and most employees were not allowed to enter. This is most likely how Springtrap earned its name, trapping the user inside of itself because of faulty springs. The entrances to the rooms mentioned above were later covered up with pseudo walls and hidden from all camera views and maps, thus making these rooms nonexistent to unsuspecting customers and employees.
Purple Guy Death Gif 3
Springtrap's sprite when sitting down in the Night 5 Minigame.
When the Purple Guy returned to the restaurant to dismantle the animatronics, he awoke the ghosts of the five children he murdered. Terrified by the spirits, Purple Guy ran into the safe room where Springtrap was placed for storage. He wore the suit to hide from the ghosts, and the trick appeared to have worked at first, causing him to stand up suddenly and laugh at the ghosts while inside Springtrap. However, the mechanisms within Springtrap malfunctioned and Purple Guy was crushed and sliced by the internal springs and gears, thus killing him. Phone Guy's tapes also foreshadow this, as he explains that the person wearing the costumes must not breathe on the spring locks or make sudden movements, and Purple Guy broke these rules; he made a sudden movement by jumping into the suit, and possibly breathed on the spring locks when he laughed, resulting in the locks becoming loosened and his brutal death.
30 years later, Fazbear's Fright: The Horror Attraction was opened as a homage to The Missing Children Incident and other incidents that made Freddy Fazbear's Pizza infamous for being haunted. Employees found Springtrap and reused it for the attraction. However, at night, it roams the halls, presumably possessed by the body and spirit of the Purple Guy.