| 摘要 |
1. Apparatus for setting up a video display unit on a working surface, having a base plate (1) ; a height adjusting device (4, 5, 6, 7, 10) consisting of at least one lever arm (4) which has a parallelogram linkage system (50-53) and is mounted in a shaft (17) arranged on the base plate, and at least one support arm (10) which is attached to the parallelogram linkage system and is led parallel to the base plate ; a pivotting device (8, 12, 13, 14, 15) for pivotting about a horizontal axis ; a weight compensating device (6) which compensates for at least a part of the weight of the video display unit ; and a holding device (9, 12, 18, 19) for holding the lever arm at a desired height, characterised in that the height adjusting device has two lever arms (4, 5) and two support arms (10) ; that the weight compensating device consists of a compression spring (6) which is arranged between at least one of the lever arms (4, 5) and the associated parallelogram linkage system (5) ; that the pivotting device consists of a cradle (8) which carries the video display unit, guide means which are arranged on said cradle and the two support arms (10), and which engage with one another, and at least one stop (13) which serves to limit the pivotting movement ; and that the compression spring (6) is biassed by a force which moves the video display unit upwards. |
