Patent Number: 8,820,385

Title: Control device for cordless blind with willful stop

Abstract: Disclosed is a control device for a cordless blind with willful stop at any positions according to user needs during switching operation. The control device primarily comprises a force-return mechanism, a shaft connector, and a braking buffer mechanism which are all installed inside a same housing. The force-return mechanism has a flat spring bevel gear and an elastic element. One end of the shaft connector is a transmission bevel gear meshed with the flat spring bevel gear. The braking buffer mechanism includes a friction ring and an impeding spring where the friction ring is immovably fixed inside the housing with a wear-proof annular inwall. The impeding spring is tightly plugged into the friction ring with an extrusion to prevent the rotation of the transmission bevel gear. Specifically, the shaft connector has a trigger to change the friction between the impeding spring and the friction ring.

Inventors: Wu; Cheng-Ming (Kaohsiung, TW)

Assignee: Bao Song Precision Industry Co., Ltd.

International Classification: E06B 9/305 (20060101)

Expiration Date: 9/02/12018