Transmission stopping device for cordless curtain
US10557305B2 · kind B2 · utility
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4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2017 |
| Grant date | Feb 11, 2020 |
| Priority date | — |
| Expiry date | Jun 4, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2055/178
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A transmission stopping device for a cordless curtain includes a box assembly and a stop wheel assembly disposed in the box assembly. The stop wheel assembly includes a torsion wheel and a stop wheel. The stop wheel is provided with balls therein. A rotation-stopping assembly is provided between the stop wheel and the box assembly. The cooperation between the balls of the stop wheel and the rotation-stopping assembly in the box assembly ensures that the ascent and descent of a curtain achieves an accurate positioning.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.