Patent ID: 7677628

Claim:
A unit ( 1 ) for synchronous extension and retraction of two wire segments ( 3 , 4 ) wound onto a storage spool ( 20 ) in such a way that upon a rotary motion of the storage spool ( 20 ) in one rotation direction, both wire segments ( 3 , 4 ) are synchronously unwound, and upon a rotary motion of the storage spool ( 20 ) in the other rotation direction they are synchronously rewound, the wire segments ( 3 , 4 ) being separated from one another and being fastened at their storage-spool ends to the storage spool ( 20 ), wherein the storage spool ( 20 ) comprises a blocking mechanism ( 33 , 34 ) that, when engaged, blocks rotation of the storage spool ( 20 ) in the rotation direction in which the wire segments ( 3 , 4 ) are unwound from the storage spool ( 20 ), and is releasable via an actuation device; and wherein the storage spool ( 20 ) is arranged on a rear access panel of a motor vehicle, which panel is pivotable about a horizontal axis from a closed position into an open position and vice versa, the wire segments ( 3 , 4 ) extending from the storage spool ( 20 ) to both sides of the rear access panel and from there to the body, where their ends are fastened in such a way that the wire segments ( 3 , 4 ) are unwound from the storage spool ( 20 ) upon opening of the rear access panel.