US 12,448,838 B2
Adjustable resistance tail plug
Szu-Chang Huang, Fusing Township, Changhua County (TW)
Assigned to BEAUTIFUL WINDOW FASHIONS CO., LTD., Fuxing Township (TW); and TAICANG KINGFU PLASTIC MANUFACTURE CO., LTD., Taicang (CN)
Filed by Beautiful Window Fashions Co., Ltd., Fuxing Township, Changhua County (TW); and TAICANG KINGFU PLASTIC MANUFACTURE CO., LTD., Taicang (CN)
Filed on Jan. 18, 2023, as Appl. No. 18/156,294.
Claims priority of application No. 202222962082.0 (CN), filed on Nov. 3, 2022.
Prior Publication US 2024/0151103 A1, May 9, 2024
Int. Cl. E06B 9/44 (2006.01)
CPC E06B 9/44 (2013.01) 11 Claims
OG exemplary drawing
 
1. An adjustable resistance tail plug for a roller blind device, the roller blind device including an aluminum tube, a blind body that is scrolled by the aluminum tube, and a mounting bracket that is disposed at one side of the aluminum tube, said adjustable resistance tail plug comprising a fixed seat, an adjusting wheel, a sleeve, a screw rod unit, an outer casing, a friction wheel and a clutch spring, said fixed seat being adapted to be disposed on said mounting bracket, and having a first circumferential surface that surrounds an axis, and a second circumferential surface that surrounds said axis, said second circumferential surface being located at one side of said first circumferential surface opposite to said mounting bracket, a section of said fixed seat that has said second circumferential surface having an outer diameter smaller than another section of said fixed seat that has said first circumferential surface, said adjusting wheel being rotatably sleeved on said first circumferential surface, said sleeve being rotatably sleeved on said adjusting wheel, said screw rod unit being connected to said fixed seat and extending along said axis, said outer casing including a casing body that is adapted to be disposed on the aluminum tube and that is connected to said screw rod unit, and an inner cavity that formed in said casing body, said inner cavity being for receiving said sleeve, a portion of said adjusting wheel and a portion of said fixed seat, said friction wheel being located within said inner cavity, engaging threadably said screw rod unit, and being driven by said sleeve to move relative to said casing body along said axis, so as to adjust a friction force between said casing body and said friction wheel, said clutch spring being sleeved on said second circumferential surface, and being partially located between said sleeve and said adjusting wheel, said clutch spring being switchable between a contracted state and an expanded state, when in the contracted state, said clutch spring being tightened to abut against said second circumferential surface so that said sleeve is prevented from rotating relative to said fixed seat by said clutch spring, when in said expanded state, said clutch spring releasing said second circumferential surface, and said adjusting wheel being rotatable with said sleeve through said clutch spring about said axis.