| 摘要 |
<p>A roller shade return mechanism comprises a rotary roller shade rod which is rotatably mounted in relation to a non-rotary member carrying a profiled pin to be received in a roller shade mounting bracket. Characteristic of this mechanism is that the member to be connected with the roller shade rod is in the shape of an end plug adapted to be fixed in a recess at the end of the roller shade rod and having a through }bore to constitute a bearing rotatable together with the roller shade rod for a spindle which is arranged in the roller shade rod and the outer end of which carries the profiled pin, part of the through bore in the end plug being formed as a 1a chamber which accommodates a friction brake which includes a support washer connected to the spindle, the bottom of the chamber and at least two friction washers arranged between the support washer and the chamber bottom, the two friction washers being annular and cup-shaped spring washers placed back to back and bearing with oppositely facing peripheral edges against the support washer, on the one hand, and the bottom of the chamber, on the other hand. 1b lb</p> |
