| 摘要 |
This invention relates to eyeglasses comprising spring hinges which permit the bows of the eyeglasses to be forcibly swung out beyond open positions which are defined by stops so that the bows can resiliently bear on the head of the wearer. The spring hinges may provide for a snap action on the bows as they are moved between their swung-in and their open positions. For making each of the hinges, a preassembled unit is provided, which comprises a rim-side hinge eye connected to a slider, which contains a spring-biased plunger, a spring and a locking member. The slider of the preassembled unit is adapted to be inserted into a receptacle provided at the forward end portion of the associated bow and is adapted to be locked in the receptacle by the locking member. The locking member is provided at both ends with beveled end faces. The spring-biased plunger engages the rear end face of the locking member and is adapted to urge the forward end of the locking member upwardly so that it can snap into a recess formed in the guide housing. In the slider the spring is held in a longitudinal slot, into which the spring, the spring-biased plunger and the locking member can be inserted to provide the preassembled unit. |
