| 摘要 |
<p>PURPOSE: A device support arm is provided such that a push member or a part of a lever is engaged with a locking unit to tightly fix arms at predetermined rotary angles. CONSTITUTION: A device support arm(1) comprises a plurality of arms. The arms of one side comprise a fixed positioning guide installed in bearings. The arm of the other side(12) comprises a movable positioning guide(4), a lever(6) with a push member(51), and a locking unit(52). The rotary angles between the arms are locked as the lever rotates in a predetermined direction after the arms adjacent each other are adjusted at predetermined rotary angles. The locking is released when the lever is reversely rotated. Some devices are stably maintained at a position that users want. [Reference numerals] (AA,BB) Lock</p> |
