| 摘要 |
<p>The mobile seat consists of an upper part (10) with an opening (12) and a seat (14) arranged below the opening. The lower part (16) is provided with a number of castors (17). The lower part sides are provided with elongated slots (18) and pivot pegs. The upper and lower parts are connected to each other by crossed struts (22, 24). The one strut (22) is pivoted to bearer blocks below the seat and each free end is joined to a roller sliding in the respective elongated slot. The second strut (24) is pivoted to the respective pivot pegs and is able to turn inside a bearing block. The bearing block is able to move along a rail secured to the underside of the seat. The rail is formed as a double rack on either side of an elongated slot.</p> |
