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公开(公告)号：US20250111867A1
公开(公告)日：2025-04-03
申请号：US18833185
申请日：2023-02-02
Applicant: NHK SPRING CO., LTD.
Inventor： Toshimitsu ARAKI , Wataru MIYAZAKI , Shuji TAKAHASHI
Abstract: A cover is provided with a connection portion on an outer peripheral portion for conducting fastening. The connection portion is provided with a fastening face that is fastened by a bolt on a top face and a connecting face that is connected to the base on a bottom face, and the connection portion is formed into a stepped shape with steps that form a recessed shape on the top face and a projected shape on the bottom face with respect to the outer peripheral portion. The steps are set to have dimensions less than a thickness of a plate material. The stepped shape is provided with an outer face of the step and an inner face of the step that do not overlap each other in a planer direction of the connecting face.
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