| 摘要 |
<p>1. Emergency crank handle for motor drives of roller doors, roller blinds, folding ceiling doors or the like, with a resiliently mounted crank handle (14, 114) carrying a toothed wheel (9, 19) which, when the crank handle (14, 114) is moved against the action of a spring (6, 16), can be brought into meshing contact with a drive wheel (4, 24) acting upon the working shaft (26) characterized in that the toothed wheel mounted on the crank handle (14, 114) is a cylindrical gear with envelope lines entending parallel to the axis of the crank handle, and the drive wheel connected indirectly to the working shaft (26) ist designed as a crown wheel (4, 24) the tooth envelope lines of which lie in a plane perpendicular to the axis of the crown wheel.</p> |
