| 摘要 |
<p>The invention relates to a device for height adjustment of a board, like an interactive whiteboard, the device comprising:
- a stationary first frame;
- a second frame linear and parallel movable arranged to the stationary first frame;
- at least two vertical guide rails with carriages running in the guide rails arranged between the stationary first frame and second movable frame;
- a spring for compensating the weight of at least the frame, such that the second frame can be positioned at any position relative to the first frame.</p> |
