Casio Computer Co., Ltd.

Hiroki Akai

Hirokatsu Katoh

Takahiro Moriya

Yoshihiko Sato

Kouji Oshima

Ryohei Kobayashi

Teruo Jinbo

Shingo Fukushima

Kazuo Shimada

A rear panel, which is an external member, includes a frame portion including multiple sound radiation holes including a first sound radiation hole, a second sound radiation hole, and a third sound radiation hole. A first sloping portion is disposed within an area of the first sound radiation hole and is inclined with respect to a thickness direction of the frame portion towards a first direction non-parallel to the thickness direction, and a second sloping portion is disposed within an area of the second sound radiation hole and is inclined with respect to the thickness direction of the frame portion towards a second direction different from the first direction and non-parallel to the thickness direction, and the third sound radiation hole includes a surface parallel to the thickness direction of the frame portion.

External member, external member molding method, and electronic instrument

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.

An electronic keyboard instrument includes a keyboard provided on a player's side, a case including a back panel including a first sound radiation hole portion, an upper panel provided contiguously with the back panel, and a keyboard installation portion disposed in such a manner as to correspond to the keyboard, a speaker disposed in such a manner as to correspond to the first sound radiation hole portion, and a magnetic shielding member including a magnetic shielding material and disposed between the keyboard and the sound radiating section and fixed to the upper panel and the back panel in such a manner as to span the upper panel and the back panel.

Electronic keyboard instrument

A sound radiation apparatus includes a speaker, a first cover having an opening area provided to be superposed above at least a sound radiation port of the speaker and made up of multiple opening portions at a location superposed above the speaker, a second cover superposed on a front side of the first cover while surrounding the opening area of the first cover, and a saran net covering the first cover and a front side of the second cover and bonded to the second cover, wherein the second cover and the saran net are bonded together at an area on the second member excluding a portion surrounding the opening area of the first cover with a first adhesive and an area on the second cover surrounding the opening area of the first cover with a second adhesive having a higher bonding strength than that of the first adhesive.

Sound radiation appratus, electronic musical instrument, and sound radiation appratus fabrication method

An electronic musical instrument according to one embodiment of the present disclosure includes a loudspeaker which releases sounds in a first direction in accordance with an instrument playing operation, an internal component which includes a substrate, a case which houses the loudspeaker and the internal component and has a first region which faces a rear face of the loudspeaker and a second region which faces a rear face of the internal component and does not face the rear face of the loudspeaker, and a sound releasing member which is disposed on an installation face side and in the second region, and releases acoustics in an acoustic space which is formed around the loudspeaker in a second direction which is opposite to the first direction.

Growing community of inventors

Hino, Japan

Hiroki Akai