| 摘要 |
PURPOSE:To enable a person in spectacles to observe a back scene easily by vipotally fitting an R-shaped reflector by a fine hole perforated on the center of a clamping thin screw for coupling the frame of the spectacles and its bow. CONSTITUTION:The fine hole 21 is perforated on the center part of the clamping thin screw 2 for coupling the frame 5 with the bow 1, a shaft having a head part 10 is inserted into the hole 21 and a supporting ring 41a of a fittings 41 of the R-shaped reflector 4 is engaged between the upper and lower parts of the shaft 11 and the screw 2 so that the reflector 4 can be freely rotated. When the reversed R-like reflector 4 is rotated to the outside, the light from a back object is reflected by the reflecting curved surface and the reflected light is made incident upon the observer's eyes to observe the back object. There is no trouble for carrying the spectacles by folding the reflector, and if the reflector is unnecessary, the reflector may be unloaded. Thus, any bad influence is not exerted upon the stectacles. |
