| 摘要 |
A relatively light duty cone type clutch suitable for use in window blind or shade mechanisms is disclosed. As contrasted with conventional cone type clutches, the disclosed embodiment includes a plurality of radially arranged conically shaped rollers which are maintained in position by a spider forming part of a motion input pulley. The rollers are urged into engaged condition between a fixed clutch body and a polygonally shaped motion output core. The clutch is maintained in engaged condition by residual torque upon the output core provided by the weight of the unwound portion of the shade or blind. Upon the occurrence of rotary motion imparted to the pulley in either direction, the movement of the spider dislodges the rollers in an axial direction from engagement with the clutch body, following which motion is transmitted through the spider and rollers directly to the output core. When motion ceases, the rollers are returned to static position by a pressure washer carried by the spider.
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