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公开(公告)号：US12010498B2
公开(公告)日：2024-06-11
申请号：US17859265
申请日：2022-07-07
Applicant: ALPS ALPINE CO., LTD.
Inventor： Haruki Uesugi , Kei Tanabe , Yusuke Yoshida
CPC classification number: H04R9/025 , H04R1/288 , H04R9/047 , H04R9/06 , H04R2209/027 , H04R2400/07 , H04R2400/11
Abstract: An outer structure of a magnetic circuit is held inside a holder recess of a magnetic circuit holder of a frame. A pressing portion is screw-fixed to a mounting surface of the magnetic circuit holder. Elastically deformable pressing arms are formed at the pressing portion, and the pressing arms press a restriction surface of the outer structure of the magnetic circuit.
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公开(公告)号：US20230269540A1
公开(公告)日：2023-08-24
申请号：US18107756
申请日：2023-02-09
Applicant: ALPS ALPINE CO., LTD.
Inventor： Hiroki Toita , Yusuke Yoshida
Abstract: A speaker includes a diaphragm having a perfectly circular hole in which a bobbin is attached and an oval or elliptical outer peripheral end. The diaphragm includes a perfectly circular cross-sectional area in the range of a predetermined height above a base having the perfectly circular hole. The diaphragm further includes an intermediate area whose outer surface has a small curvature radius above the perfectly circular cross-sectional area and an expanded area that is oval in cross section above the intermediate area.
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公开(公告)号：US20230037430A1
公开(公告)日：2023-02-09
申请号：US17859265
申请日：2022-07-07
Applicant: ALPS ALPINE CO., LTD.
Inventor： Haruki Uesugi , Kei Tanabe , Yusuke Yoshida
Abstract: An outer structure of a magnetic circuit is held inside a holder recess of a magnetic circuit holder of a frame. A pressing portion is screw-fixed to a mounting surface of the magnetic circuit holder. Elastically deformable pressing arms are formed at the pressing portion, and the pressing arms press a restriction surface of the outer structure of the magnetic circuit.
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