Invention Grant
- Patent Title: Top-down bottom-up window covering
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Application No.: US17317874Application Date: 2021-05-11
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Publication No.: US11686153B2Publication Date: 2023-06-27
- Inventor: Lin Chen
- Applicant: Nien Made Enterprise Co., Ltd.
- Applicant Address: TW Taichung
- Assignee: Nien Made Enterprise Co., Ltd.
- Current Assignee: Nien Made Enterprise Co., Ltd.
- Current Assignee Address: TW Taichung
- Agent Winston Hsu
- Priority: CN 2023152965.2 2020.12.24
- Main IPC: E06B9/90
- IPC: E06B9/90 ; E06B9/76

Abstract:
A top-down bottom-up window covering has a headrail, a middle rail, a bottom rail, a lifting control structure installed at the headrail, and a covering structure installed between the middle rail and the bottom rail. The lifting control structure controls a first rotating shaft and a second rotating shaft to respectively receive or release a first cord and a second cord. The first cord drives the middle rail to move, and the second cord drives the bottom rail to move. A one-way clutch and a pre-stress unit are further provided at the headrail. When the bottom rail pushes the middle rail to move upward, the one-way clutch breaks a link between the first rotating shaft and the lifting control structure. Consequently, a driving force generated by the pre-stress unit immediately drives the first rotating shaft to receive the first cord to keep the first cord taut.
Public/Granted literature
- US20220205320A1 TOP-DOWN BOTTOM-UP WINDOW COVERING Public/Granted day:2022-06-30
Information query
IPC分类: