| 摘要 |
A multiple gear driver having first and second fixed gears and first and second rotatable gears, the first fixed and rotatable gears located on a first member, and the second fixed and rotatable gears located on a second member, the first and second fixed gears having a common axis so that the first fixed gear drives the second rotatable gear and the second fixed gear drives the first rotatable gears when the first and second member are moved relative to each other. |
