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    • 4. 发明授权
    • Adjustable tightening device
    • US11363846B2
    • 2022-06-21
    • US16707206
    • 2019-12-09
    • Meng-Chun Wang
    • Meng-Chun Wang
    • A41F1/00
    • An adjustable tightening device is provided, including: a fastening, an actuating member and a rotatable member. Wherein when the rotatable member is rotated toward a first direction, each abutting rib of the rotatable member is located in the third position, each of the two abutting ribs abuts against one of two elastic arms of the actuating member so that a ratchet is not meshed with an annular gearing portion of the fastening mechanism and a gear portion of the actuating member is rotatable toward the first direction; wherein when the rotatable member is rotated toward a second direction, each of the two abutting ribs is located in the fourth position, each of the two abutting ribs abuts against one of the two elastic arms so that the ratchet is meshed with the annular gearing portion and the gear portion is unidirectionally rotatable toward the second direction.