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Title:
RETRACTION/EXTENSION DEVICE FOR RETRACTION/EXTENSION OF SHADE CORD AND RETRACTABLE/EXTENSIBLE SHADE
Document Type and Number:
WIPO Patent Application WO/2018/018718
Kind Code:
A1
Abstract:
A retraction/extension device for the retraction/extension of a shade cord (200) and a retractable/extensible shade. The retraction/extension device comprises a bracket (300), a mounting base (400), a synchronous pulley set (1), a transmission assembly (2), and winding assemblies (3). The synchronous pulley set (1) comprises at least one coil spring (12) and at least two synchronous pulleys (11) rotatably disposed on the mounting base (400). The transmission assembly (2) comprises a first conical gear (22) and a second conical gear (23) that are engaged with each other, the first conical gear (22) being connected to the synchronous pulleys (11). The winding assembly (3) comprises a fixed base (31), a winding shaft (32), and a transmission shaft (33), the transmission shaft (33) being connected to the second conical gear (23), the diameter of the outer wall of the winding shaft (32) varying along the axis of the winding shaft. The retraction/extension shade comprises the retraction/extension device, a shade body (100), and a cord (200). The retraction/extension device and the retractable/extensible shade feature compact structures, and the cord (200) would not be easily twisted or knotted.

Inventors:
HUANG, Jiehren (2 Gugang Road, Taicang, Jiangsu 0, 215400, CN)
Application Number:
CN2016/098755
Publication Date:
February 01, 2018
Filing Date:
September 12, 2016
Export Citation:
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Assignee:
SUZHOU HONGREN WINDOW DECORATIONS CO., LTD (2 Gugang Road, Taicang, Jiangsu 0, 215400, CN)
International Classes:
E06B9/262; E06B9/38
Attorney, Agent or Firm:
SUZHOU CREATOR PATENT & TRADEMARK AGENCY LTD. (No.93 Ganjiang West Road, Suzhou, Jiangsu 2, 215002, CN)
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