| 摘要 |
A four-string winding fastener file case comprising a case body (R) and a case cover (Y) and provided with inner and outer winding fasteners. The outer winding fastener is provided at the front edge of the case cover and the outer right side of the case body. The inner winding fastener is provided at both sides at the upper extremity of the case body. Four strings (s1, s2, z1, and z2) fix the winding fasteners. Both extremities of two of the strings are fixed by rivets (v1, v2, c1, and c2) to serve as winding fasteners. Both extremities of two of the strings are fixed by knots formed by selves to form winding straps, or, either extremity of the strings can be fixed by rivets, while the other extremity is fixed by knots formed by the strings themselves to form winding straps. Both extremities of each string run outward from the inside. The rivets, winding spacers, and winding straps are fixed at either extremity of one of the strings. The file case has the fixed winding straps and the strings of the winding fasteners planted directed into the case body and the case cover, and the points of force application are on the strings, thus providing firm bundling, great tightness, and protective effects for the case body and the case cover. |
