Casio Hitachi Mobile Communications Co., Ltd.

Fumio Tsutaichi

Katsuhiro Nara

Shinya Yasuda

Tohru Tanigawa

Eiji Okita

Tatsuya Miyagawa

In a portable telephone, the front side of a back casing is covered with a front casing. A circuit substrate is housed in a housing concave portion of the back casing and the front side of the circuit substrate is covered with a waterproof type keypad sheet material. The outer edge section of the waterproof type keypad sheet material is fastened between the outer edge section of the back casing and the outer edge section of the front casing. A mounting hole is formed in the waterproof type keypad sheet material and a microphone holder is inserted into the mounting hole. A microphone is mounted in the microphone holder, a waterproof membrane is affixed on the end face of the microphone holder and a small opening of the microphone holder is blocked by the waterproof membrane.

Mounting structure for an electroacoustic transducer

A foldable cellular phone with a plastic housing having an operation section and a plastic housing having a main display section that are joined by a hinge on one end side to freely open and close, comprising an impact resistant handle composed of elastic material protruded and formed on the opposite side end from the hinge of the housing having the main display section; a connector cover composed of elastic material protruded and formed on the opposite side end from the hinge of the housing having the operation section; and a hinge cover composed of elastic material formed on a protrudent portion from the hinge of both housing ends when both housings are in a folded state.

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Akishima, Japan

Fumio Tsutaichi