| 摘要 |
<p>The unit (1) assembled of a short shaft (2) with a ball element (3) at its outer end and a socket (14) can be joined to a matching tow bar and folded into a position for use or for storage. A pointed element (8, 16) attached to the lower end of a rotating shaft (12) is guided across the inclined surfaces (10, 11) of a recessed area (9) at the rear end (5) of the shaft (2) holding the ball element (3). The pressure acting on particular areas (10, 11) forces the shaft (2) to move into the appropriate direction.</p> |
