Nec Corporation

Hiromu Kitamura

Masakatsu Takizawa

Masaki Shimamura

Yoshiki Miyazawa

Jun Watanabe

Jin Kuramoto

Akiko Takeuchi

Shuichi Saito

Kazuhiko Yamaoka

Portable wireless telephone

In a portable telephone including a plurality of input buttonsfor inputting various indications, light emitting elementswhich emit a light, when any one of the input buttonsis pushed on, diffuserswhich are located under a plurality of input buttonsand which diffuse the light emitted from the light emitting element, the diffuserhas an incidence portionwhich has a receiving plane positioned near the light emitting elementsand receiving the light emitted from the light emitting elements, and a projecting portionwhich has a reflecting plane for reflecting the light received by the incidence portionto an upper side of a plurality of input buttons

Portable telephone, diffuser and lighting device provided therein

A key button switch structure for use in a handheld mobile phone, comprises an input buttonhaving a push-down pressure transmitting projection Aand a button inclination preventing projection Bboth projected from a bottom surface of the input button, integrally with the input button. Two electrodes Aand Bare formed on a substratefixed to a body casingA dome-like switch contactis provided to be pushed down by the push-down pressure transmitting projection Aof the input button when the input button is depressed, thereby to electrically contact both the two electrodes. Thus, since the button inclination preventing projection Bis provided, even in the case that an action center line of the dome-like switch contact is not coincident with an input pressure center line of the input button, when the input button is depressed, the electrodes Aand Bformed on the substrateare surely electrically interconnected by the dome-like switch contact effectively uniformly collapsed by the push-down pressure transmitting projection Aof the input button.

Key button structure for handheld mobile phone and its similar instrument, and method for forming the same

Function keys for a portable wireless telephone

Keypad for a portable wireless telephone

Sub-display and function keys unit for a portable wireless telephone

Growing community of inventors

Tokyo, Japan

Hiromu Kitamura