Title:
QUICK TELESCOPIC ROD STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2021/217876
Kind Code:
A1
Abstract:
A quick telescopic rod structure, comprising a first-stage pipe (11), a second-stage pipe (21) and a third-stage pipe (31). A locking seat (16) is installed in an installation hole in an inner wall of the first-stage pipe (11); a locking piece (15) is arranged in a fixing groove in the locking seat (16); the locking piece (15) and the locking seat (16) are both inclined in the direction of the first-stage pipe (11); a slide block (13) is installed on the locking seat (16); a via hole for a screw rod (18) is provided in the locking seat (16); the screw rod (18) sequentially passes through a spring (17) and the via hole in the locking seat (16) to install the slide block (13) and the locking seat (16) together; a plurality of locking column holes are provided in the slide block (13); locking columns (14) are installed in the locking column holes; the locking columns (14) create rolling contact friction with the locking piece (15) and also create rolling friction with an inner wall of the second-stage pipe (21); under the action of the spring (17), the locking seat (16) and the slide block (13) bear the tension of the spring (17) all the time; and the locking piece (15) is inclined, such that the locking columns (14) move in a normal direction of the pipe after bearing the tension of the spring (17).
Inventors:
ZHANG HONGBIN (CN)
LU JINHUA (CN)
LU JINHUA (CN)
Application Number:
PCT/CN2020/100537
Publication Date:
November 04, 2021
Filing Date:
July 07, 2020
Export Citation:
Assignee:
ZHANG HONGBIN (CN)
International Classes:
F16B7/14; F16B7/12; F16M11/28
Foreign References:
| CN210461301U | 2020-05-05 | |||
| CN103291707A | 2013-09-11 | |||
| CN109611669A | 2019-04-12 | |||
| CN209781389U | 2019-12-13 | |||
| CN209781390U | 2019-12-13 | |||
| JP2011220373A | 2011-11-04 |
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