| 摘要 |
<p>A retractable panel fastener includes a hold down mechanism that holds the screw in an extended position. A deformable ring around hte outside of hte retainer engages an inward facing lip at the bottom of a cap which is rigidly attached to the head of the screw. The ring is held in a groove on the retainer adjacent the bottommost travel of the cap. The ring may be composed of silicone.</p> |
