| 摘要 |
<p>A mechanism for adusting the angle of elevation of an object for use for example in a display or keyboard device, which comprises: a support (4, 7) on which the object (2) is mounted to be pivotable upward and downward (Y,Y min ) the support being provided with an engagement slot (in flange 7) formed with a plurality of recesses (7g); a locking bar (12) pivotally attached to the object (2) and engaged with the engagement slot in the support; and a sliding plate (13) secured for sliding motion relative to the flange (7) and engaging the locking bar (12) for selectively exposing or covering the recesses (7g) of the engagement slot in the support for engagement, or for preventing engagement, with the locking bar (12) according to the direction of adjustment (Y,Y min ). The angle of elevation is thus increased by moving the locking bar in one direction and is held when the locking bar engages in a selected recess in the engagement slot. When the angle of elevation is reduced the recesses are covered by the sliding plate and the locking bar cannot enter them.</p> |
