公开(公告)号：US20230199353A1

公开(公告)日：2023-06-22

申请号：US18082986

申请日：2022-12-16

Applicant: CASIO COMPUTER CO., LTD.

Inventor： Hiroki AKAI ,  Hirokatsu KATOH ,  Takahiro MORIYA ,  Yoshihiko SATO

IPC: H04R1/02 ,  H04R7/04

CPC classification number: H04R1/023 ,  H04R7/04

Abstract: A rear panel of an electronic keyboard instrument has a frame portion including multiple sound radiation holes, and the frame portion has a first hole frame including a hole forming surface of the sound radiation hole and a second hole frame including a hole forming surface of the sound radiation hole which is longer in a thickness direction of the frame portion (a Y-axis direction) than the first frame.

公开(公告)号：US20230199376A1

公开(公告)日：2023-06-22

申请号：US18082840

申请日：2022-12-16

Applicant: CASIO COMPUTER CO., LTD.

Inventor： Hiroki AKAI ,  Hirokatsu KATOH ,  Takahiro MORIYA ,  Yoshihiko SATO

IPC: H04R1/34 ,  H04R1/02

CPC classification number: H04R1/345 ,  H04R1/023 ,  H04R1/025 ,  H04R2400/11 ,  H04R2201/029

Abstract: A rear panel 15, which is an external member, includes a frame portion 110 including multiple sound radiation holes 150 including a first sound radiation hole 160-1 and a second sound radiation hole 160-2, a first sloping portion 160b disposed in the frame portion 110 with a first sloping surface 161a oriented in a first direction 161c, the sloping surface 161a being disposed within an area of the first sound radiation hole 160-1 in such a manner as to slope from a thickness direction (a Y-axis direction) of the frame portion 110, and a second sloping portion 162b disposed in the frame portion 110 with a sloping surface 162a oriented in a second direction 162c which differs from the first direction 161c, the sloping surface 162a being disposed within an area of the second sound radiation hole 160-2 in such a manner as to slope from the thickness direction (the Y-axis direction) of the frame portion 110.