| 摘要 |
A triple strap insertion fastener file case comprising a case body (A), a case cover (A1), and a flap (A2). Insertion fasteners (T1 and T2) are constituted by three longitudinal straps (x, y, and a) and two pins (e1 and e2). Both ends of two longitudinal straps (x and y) are planted outward from within the flap, run to the outside of the flap, and then run inward to the inside of the flap. The straps are fixed by being tied to selves or connected head-to-tail. Alternatively, two longitudinal straps are planted from the right side within the case bottom, run to the outside of the case bottom, run into holes of the pins, and then fixed by being tied to selves or connected head-to-tail. The file case is firm and durable. |
