The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 02, 2014
Filed:
May. 10, 2012
Cheng-ming Wu, Kaohsiung, TW;
Cheng-Ming Wu, Kaohsiung, TW;
Bao Song Precision Industry Co., Ltd., Kaohsiung, TW;
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.