Title:
ROTATION CONTROL MECHANISM FOR USE IN FOLDING LADDER, AND FOLDING LADDER
Document Type and Number:
WIPO Patent Application WO/2021/109845
Kind Code:
A1
Abstract:
A rotation control mechanism for use in a folding ladder, and a folding ladder. The rotation control mechanism comprises a first rotating member (1), a second rotating member (2), and a first locking pin (51); the first rotating member (1) is provided with a pin hole (11); the second rotating member (2) is provided with a locking hole (21); the first locking pin (51) is inserted into the pin hole (11) and the locking hole (21) so as to lock the first rotating member (1) and the second rotating member (2); the first locking pin (51) and the first rotating member (1) are circumferentially limited and movably arranged in an axial direction; a first elastic member (34) is connected to the first locking pin (51) and applies an action force to the first locking pin (51) to be inserted into the locking hole (21); the second rotating member (2) is provided with a trigger portion (31); and the first rotating member (1) is provided with an elastic braking portion. The folding ladder comprises two ladders and two rotation control mechanisms; the top of one of the ladders is connected to the first rotating member (1), and the top end of the other is connected to the second rotating member (2). The first rotating member (1) and the second rotating member (2) can be automatically rebounded and locked after mutually rotating to a required angle. The present invention is simple in structure and convenient to use.
Inventors:
ZHU XUELIN (CN)
YAO BAISONG (CN)
LIU WEIQIANG (CN)
YAO BAISONG (CN)
LIU WEIQIANG (CN)
Application Number:
PCT/CN2020/128929
Publication Date:
June 10, 2021
Filing Date:
November 16, 2020
Export Citation:
Assignee:
JIANGSU ZHOU JIJIE INTELLIGENT TECH CO LTD (CN)
International Classes:
E06C7/50; E06C1/383
Foreign References:
| CN2101098U | 1992-04-08 | |||
| CN1189573A | 1998-08-05 | |||
| CN211819206U | 2020-10-30 | |||
| CN101413376A | 2009-04-22 | |||
| CN2823522Y | 2006-10-04 | |||
| DE2217258A1 | 1973-10-25 | |||
| DE4431179A1 | 1995-04-06 | |||
| US6711780B2 | 2004-03-30 |
Other References:
See also references of EP 4063608A4
Attorney, Agent or Firm:
BEIJING ZHILIN HENGYUAN INTELLECTUAL PROPERTY AGENCY (GENERAL PARTNERSHIP) (CN)
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