| 摘要 |
Subject: screen-retarding mechanism for door or window frames. Constitution: a shaft 9, two screws 3, a plastic support 7, elastic o-rings 10, a plastic shell 5, a spring 2, a plastic multi-wedged ring 4, and a washer 6. The braking of the shaft 1 and, consequently, that of the mosquito net is achieved via the elastic o-rings 10 interposed between the shaft 9 and the plastic shell 5 when the screen has been reset in its initial position. Advantages: function by mere release of the mosquito netfrom the base, smooth return of the screen to the initial position independently from the existing weather conditions. |
