Locking structure of retractable draw bar
US6338586B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 25, 2000 |
| Grant date | Jan 15, 2002 |
| Priority date | — |
| Expiry date | May 25, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/32516
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The present invention proposes an improved locking structure of a retractable draw bar. The proposed improved locking structure comprises a first joint tube, a second joint tube, a fixed assembly, a movable assembly, two click buttons, and two resilient elements. The movable assembly is inserted in the fixed assembly and can steadily move upwards or downwards with respect to the fixed assembly. The upper and lower click buttons and the two resilient elements are axially adjacent and are installed in the fixed assembly to penetrate in the movable assembly. The upper and lower click buttons can work in opposite directions and be secured and positioned in the upper and lower click holes when the draw bar is protracted or retracted. Wedged guide grooves and wedged guide blocks are installed at corresponding positions on the movable assembly and the upper click button, respectively. No matter the movable assembly is pulled upwards or pushed downwards, the upper click button can be pushed sideward and retracted transversely from the click hole. The number of components is reduced and there are higher compatibility and interaction between them. Easy assembly and smooth protraction/retract…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.