| 摘要 |
<p>The system described enables a rotor (2) to be turned between two positions which are rotationally displaced in relation to one another through a preset angle and allows it to be locked in said position. Corresponding to the end positions are end stops (1a, 1b) against which the drive urges the rotor (2). In this position the mobile levers (1) between two parts, to one of which they are fixed, can be released. Said levers (12) are provided with teeth (11) which then engage in the recesses of the rotor (2). The still effective drive moment of the drive system then entrains the part (13), to which the levers (12) are not fixed, in a direction opposite to the rotation direction of the rotor, and so the levers (12) are guided downwards from the position in which they link both parts passing over sloping surfaces, and for this purpose they are brought into a locking position of the rotor (2) and of the part (14) which is provided with the levers (12).</p> |
