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1. (WO2018053390) WINDOW SHADE AND ACTUATING SYSTEM THEREOF

Pub. No.:    WO/2018/053390    International Application No.:    PCT/US2017/051991
Publication Date: Fri Mar 23 00:59:59 CET 2018 International Filing Date: Tue Sep 19 01:59:59 CEST 2017
IPC: E06B 9/60
E06B 9/24
E06B 9/322
Applicants: TEH YOR CO., LTD.
HUANG, Chien-Fong
Inventors: HUANG, Chin-Tien
HUANG, Chien-Lan
Title: WINDOW SHADE AND ACTUATING SYSTEM THEREOF
Abstract:
An actuating system (110) for a window shade includes a fixed support shaft (118), a rotary drum (120) pivotally connected with the support shaft, the rotary drum being rotatable for winding or unwinding a shading structure (104), and a limiting mechanism (124) disposed inside the rotary drum and including a threaded portion (160) provided on the support shaft, a stop portion (162), a limiting part (164), and a follower (166) engaged with the threaded portion, the stop portion and the limiting part being respectively disposed adjacent to a first and a second end of the threaded portion, and the follower being rotationally coupled to and slidable relative to the rotary drum. The rotary drum is rotatable in a first direction to drive the follower to slide toward a first position for engagement with the limiting part, and in an opposite second direction to drive the follower to slide toward a second position for engagement with the stop portion. The invention comprises also a window shade with a limiting mechanism with an unlocking state in which the drum is rotatable in both directions and a locked state preventing rotation of the drum in the winding up direction of the shading structure.