| 摘要 |
<p>The barrier has a locking mechanism with turntable including three holes (53), where two holes are separated by 90 degrees and third hole is separated by 180 degrees with respect to one of the two holes. A plate (43) is engaged between a turntable and a plate (41) to cover one of the holes (53) for forming a shallow hole to immobilize an arm in an opening position. The other holes (53, 63) form a deep hole for locking the arm. The plate (41) is mounted on the turntable in two different positions and includes three holes (63). Two plate holes that are separated by 90 degrees coincide with corresponding holes of the turntable in one position. Third and first holes of the plate separated by 180 degrees coincide with corresponding holes of the turntable. A striking part (42) is mounted on the plate (41) in two different positions.</p> |
