Fastener for document folder

A fastener for a document folder, comprising a base plate, a hook bracket and torsion springs, wherein the front end of the base plate is extended upwards and curled to form a bending section;

• a slot formed by the surrounding of the bending section;
• rotating shafts on two sides of the front end of the hook bracket respectively arranged at two ends of the inside of the slot;
• the torsion springs respectively sleeved on the rotating shafts on two sides of the front end of the hook bracket;
• one ends of the torsion springs fixed on the rotating shafts and the other ends of the torsion springs fixed on the base plate;
• end sections of the rotating shafts bent upwards to form retaining sections;
• clamp holes engaged with the retaining sections and used for fastener opening formed on the front of the bending section;
• when the hook bracket turned up along with the rotation of the rotating shafts until the retaining sections of the rotating shafts driven to rotate to the clamp holes, top ends of the retaining sections extended out of the clamp hooks and the retaining sections clamped with the clamp holes;
• and the upper part of the bending section movably connected with a slider used for fastener closing and capable of sliding along the surface of the bending section.