| 摘要 |
The base body -1- has two vertical guide flanges -8- symmetrically arranged on its two front faces, positioned opposite respective grooves -7- disposed on the vertical faces -6- of the frame chassis -2-, the flanges -8- of which slide into said grooves -7- during movement of the base body -1- to become finally positioned inside the frame chassis -2-, thereby eliminating the swinging or sideways movement thereof. The grooves -7- have a special contour, delimiting an upper zone -7a- that is slightly open and incides upon the edge of the frame chassis -2-, a wide central zone -7band a straight lower zone -7c-. A tongue -3- is disposed opposite the central groove -7- and a clip -5- incides upon the edge of the frame chassis -2-, pressure being exerted on said clip -5- and consequently on the tongue -3- which moves, due to its flexibility, towards the interior of the base body -1-, returning to its initial position when the body -1-reaches its final position and the clip -5- is introduced into the wide zone -7b- of the groove -7-, becoming fastened together by clipping. The base body -9- of smaller width has a single vertical guide flange -10-. |
