| 摘要 |
<p>In the present invention, by means of a bottom support member (11), a top support member (12), and a pair of links (13a, 13b), a parallel link mechanism is configured that forms a parallelogram having spindles (11a, 11b, 12a, 12b) that rotatably support the pair of links (13a, 13b) as vertices, and when the pair of links (13a 13b) rotate centered on the bottom end spindles (11a, 11b) supported at the bottom support member (11), the top support member (12) descends or ascends while maintaining a parallel state to the bottom support member (11).</p> |
