| 摘要 |
A tripod includes a supporting base for positioning, a rotary camera platform assembly fastened pivotally with the supporting base, a driving mechanism adapted to rotate the camera platform assembly alternatively forwards and backwards on the supporting base, and a control mechanism adapted to control rotation of the camera platform assembly within a predetermined range of angles, the control mechanism including a graduation dial for rotary motion with the camera platform assembly, two micro switches, a trigger rod mounted in the supporting base between the micro switches and adapted to trigger the micro switches alternatively during operation of the driving mechanism for enabling the driving mechanism to be alternatively controlled by the micro switches to rotate the camera platform assembly forwards and backwards.
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