| 主权项 |
1. A roller shutter for an opening leaf of a building, wherein said roller shutter comprises a retractable shut-off panel having a structure that moves between a retracted position and a deployed position, a drive device for driving said shut-off panel between said retracted position and a deployed position, a guidance device having a structure that selectively guides said shut-off panel along one of a first path and a second path, wherein said first path is a path between said retracted position and a deployed position in a first plane, and wherein said second path is a path between said retracted position and a deployed position in a second plane parallel to said first plane, said guidance device having a structure that selectively switches movement of said shut-off panel between said first path and said second path, a shaft driven in rotation about an axis by said drive device, said shut-off panel being rolled up around said shaft when in said retracted position, said shaft being driven selectively in one of a direction of rotation for retraction of said shut-off panel and a direction of rotation for deployment of said shut-off panel, said directions of rotation for retraction and deployment being opposite to one another, and a deployment switching stop, wherein said shut-off panel, when in said retracted position, comes into contact alternately with said deployment switching stop when said shaft rotates continuously in said direction of rotation for retraction, wherein said deployment switching stop guides said shut-off panel along said second path when said shut-off panel is in contact with said deployment switching stop and said shaft is driven in said direction of rotation for deployment, and wherein said shut-off panel is guided along said first path when said shut-off panel is not in contact with said deployment switching stop and said shaft is driven in said direction of rotation for deployment. |
