SPEAKER
    3.
    发明公开
    SPEAKER 审中-公开

    公开(公告)号:EP4418686A1

    公开(公告)日:2024-08-21

    申请号:EP24157822.8

    申请日:2024-02-15

    Inventor: Egami, Katsuhiko

    CPC classification number: H04R9/022 H04R9/025 H04R2201/02820130101

    Abstract: A through hole is formed in an inner-side yoke making up a magnetic circuit portion, passing therethrough following a vibration direction of a vibration unit, and circuit boards are disposed in the through hole. The circuit boards are disposed with board surfaces thereof following the vibration direction of the vibration unit. Also, an opening area of a middle space across which the circuit boards oppose each other is larger than opening areas of side spaces. Accordingly, flow quantity of air through the through hole can be secured, increase in air resistance at the time of vibration of the vibration unit can be suppressed, and also wind velocity can be secured, whereby cooling effects of heat-generating components mounted on the circuit boards can be improved.

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