| 摘要 |
PURPOSE: To maintain a high spring force as well as attaching strength stabilized for a long period of time and cope with the detaching as well as reattaching of a frame body and the like easily by a method wherein an engaging part is provided at the tip end side of a slanted part, extended from the tip end of a U-shape bent part in a direction opposite to an inserting direction and slanted outwardly from a surface parallel to an attaching piece. CONSTITUTION: A U-shape bent part 12b is provided at the base end side of slanted part 12c of an elastic piece 12 whereby the elastic piece 12 maintains engaging condition with a big spring force (flexibility). Accordingly, a stress can be dispersed not only upon attaching but also in a case wherein a force due to vibration and the like is exterted at all times whereby durability can be improved. In addition, the spring force is high and an open rim is fitted into a recessed groove 13 more deeply whereby the opening rim is engaged with the recessed groove 13 across a whole widthwise size and the engaging condition can be maintained more surely compared with a conventional device wherein the engaging condition can be retained by an engaging projection. |
