| 摘要 |
<p>The invention is an accessory system for unwinding and rewinding extensible or movable straps. It is based on a winding drum integrated with a locking wheel, where the prismatic head of a shaft engages in appropriate seats, accomplishing the locking of the strap in both directions. The unlocking of the drum, manually controlled via the shaft, allows the strap to be rewound by elastic recoil or further lengthened. The device is entirely enclosed in a protective shell and can be fastened to any given surface of the system using it as an accessory, with ordinary means of fastening. The invention makes it possible to provide the strap at the desired length, without the need for traditional systems of securing or regulating the length (snap fasteners, buckles or friction block) and eliminates the hampering, unsightly appearance, and the hazard of the unused strap. The invention is applied to straps such as shoulder straps for valises or purses of any given size or material, leashes, straps for rolling shutters or blinds, etc. <IMAGE></p> |
