The elastic part (222) corresponds to the latch seat (122) of the temple leg (12) of the frame (1) and is provided with latch protrusions (223) that are latch-locked and fixed with each other.
The elastic part (222) is provided with a locking convex part (223) that is fixed by mutual locking on the locking seat (122) of the mirror foot (12) of the frame (1)
The elastic part (222) is convexly provided with a locking protrusion (223) which is mutually locked and fixed corresponding to the locking seat (122) of the temple (12) of the mirror frame (1).