| 摘要 |
A chainwinder including a. a housing formed by a covering body and closed by an attachable base, the housing for receiving a chain therein and a drive means engageable with the chain having a drive gear to selectively drive the chain from the housing and alter the degree of openness of an attached window; b. wherein the chainwinder includes an idler gear having a plurality of peripheral teeth that fit into the chain at the distal end of the chain from the end that extends out of the chain winder housing, the idler gear providing a turning arc for the end of the chain which is following an arcuate path within the chain winder housing c. wherein the idler gear having central formation to limit deflection or torsional deformation of the idler gear or deformation by the contact of the sprocket idler gear to the rest of the chainwinder such as bulging of chain within casing, when the drive gear is forcibly overdriven. WO 2011,'072343 PCT/AU2010O!0017,05 43f Al 21 16 z Figure 1 |
