| 摘要 |
The cam has an elongate frame (1), and a movable plate (2) articulated on the elongate frame. An electrically-operating unit or electromagnet (3) is utilized for generating a force according to a rectilinear motion. A set of arm assemblies (20, 21) forms a pantograph, where the arm assemblies include short arms (22, 23), long arms (26, 27) and five pivots (9, 11, 24, 25, 28). The arm assemblies are driven by the electromagnet that is utilized to produce a relative displacement of the movable plate and the elongate frame. An independent claim is also included for a method for unlocking a lift landing door. |
