| 摘要 |
<p>An adjustable foldable support device for, e.g., a microphone light, music rack, comprises a cantilever support arm 3 pivoted at 7 to a support member 5. Member 5 has two legs 13, 15 and is pivoted at 21 to a support leg 19. A link 25 is connected between the arm 3 and the leg 19 such that if an object is fitted to the arm and raised, the legs splay out and the pivot 21 falls. As shown, link 25 is a chain under tension. It is permanently connected to the pivots 7, 21 but in use extends between the free ends of bent end portions 27, 29 of the arm 3 and leg 19. Alternatively, the link may be a rigid or elastic compression member and is connected to arm 3 between pivot 7 and its object supporting end and to leg 19 between pivot 21 and its foot 23. <IMAGE></p> |
