| 摘要 |
<p>This control device for electric motor reducer intended for driving rolling shutters, roller-blinds or the like, and permitting an accidental overstepping of the electrical stop point without causing any damage in, or putting out of order, the control device, comprises a cam having a notch formed in its contour, adapted to be engaged by a follower portion of a lever so as to open a switch controlling the supply of drive current to the motor reducer. The notch has a rear portion inclined laterally and rearwardly which opens into an extension of the cam contour which is level with the bottom of the notch, or located at a lower level than this bottom. When the cam rotating in a given direction oversteps the normal electrical stop point the inclined portion moves the follower laterally and the lever is moved laterally along , its pivot axis against the force of spring means, but held at the same level.</p> |
