Title:
SPRING DRIVING SYSTEM FOR CORDLESS SHEER BLIND
Document Type and Number:
WIPO Patent Application WO/2023/217217
Kind Code:
A1
Abstract:
The present invention relates to the technical field of mechanical transmission, and particularly relates to a spring driving system for a cordless sheer blind. The spring driving system comprises a first spring joint, a transmission middle pipe, a main spring and a retarder. The main spring is sleeved on the transmission middle pipe; the first spring joint sleeves the end head of one end of the transmission middle pipe; the first spring joint is connected to the transmission middle pipe by means of a pin; the retarder sleeves the other end of the transmission middle pipe; the main spring is connected to the first spring joint and the retarder. The spring driving system for a cordless sheer blind has the advantages of reducing safety risks, reducing the spring length, and having a low failure rate. A beaded chain structure is replaced with the retarder, so that children are prevented from accidently swallowing a detached bead, thereby reducing safety risks; on the basis of speed reducing and torque increasing functions of the retarder, preloading can be achieved simply by using a large and short spring and thus a lengthened spring is not required. The spring driving system solves the problems of potential safety risks, excessively long spring and high failure rate of an existing spring driving system, and satisfies the use requirement of sheer blinds.
Inventors:
QIU YONGZHONG (CN)
Application Number:
PCT/CN2023/093457
Publication Date:
November 16, 2023
Filing Date:
May 11, 2023
Export Citation:
Assignee:
GUANGZHOU JUE DECORATION WINDOW DECORATION TECH CO LTD (CN)
International Classes:
E06B9/56; E05F5/06
Foreign References:
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| US20210164290A1 | 2021-06-03 | |||
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| DE102008009122A1 | 2009-08-20 |
Attorney, Agent or Firm:
ZHUANLI IP LAW FIRM et al. (CN)
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