Title:
DOOR CLOSING DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/028528
Kind Code:
A1
Abstract:
Provided in the present invention is a door closing device, comprising a first connection plate and a second connection plate, the first connection plate and the second connection plate respectively connect to an external door frame and a door body connection portion, a hydraulic rod, a connecting rod assembly, and a return spring are installed within the door body connection portion, a connection base is fixedly provided on the first connection plate, and one end of the connecting rod assembly is fixed on the connection base after passing through the first connection plate and the second connection plate; when opening a door, an external door body drives the first connection plate and the second connection plate to turn, and after the connecting rod assembly moves, the hydraulic rod and the return spring are driven to contract, and when closing the door the return spring drives the door body to automatically close. The connection base is connected to the door body connection portion by means of the connecting rod assembly, when being opened, the door body drives a connecting rod to move, and simultaneously the connecting rod drives the hydraulic rod and the spring to contract by means of a bottom base, a positioning protruding platform used for positioning is further provided on a guiding slide block, and the door body can be fixed after being opened; and when closing, the hydraulic rod and the spring extend and can drive the door body to automatically close.
Inventors:
LAI MINGLIANG (CN)
ZHANG FEIFEI (CN)
ZHANG JING (CN)
ZHANG FEIFEI (CN)
ZHANG JING (CN)
Application Number:
PCT/CN2021/110861
Publication Date:
February 10, 2022
Filing Date:
August 05, 2021
Export Citation:
Assignee:
NINGBO PENTAGON DAMPER CORP (CN)
International Classes:
E05F3/04; E05D5/02; E05D11/00; E05F3/20; E05F3/22; E05F15/53
Foreign References:
| CN111734246A | 2020-10-02 | |||
| CN207749960U | 2018-08-21 | |||
| CN104832024A | 2015-08-12 | |||
| CN206329200U | 2017-07-14 | |||
| GB2446894A | 2008-08-27 | |||
| DE202020100939U1 | 2020-02-28 |
Attorney, Agent or Firm:
DAN, SAMS & ASSOCIATES (CN)
Download PDF: