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Patent
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H01H 9/00 (2006.01) H01H 13/02 (2006.01) H04M 1/22 (2006.01)
Patent
CA 1295630
LIGHT EMITTING PUSH BUTTON SWITCH FOR AN ELECTRONIC APPARATUS ABSTRACT OF THE DISCLOSURE A light emitting push button switch includes a button block moveable in an upward and downward direction responsive to a pushing force applied by an operator to thus alternately change the state of the switch from an ON-state to an OFF-state, a switching detector for detecting movement of the button block and a light source, e.g., a light emitting diode, for illuminating the bottom sur- face of the button block when the switch is in the ON-state. The button block includes a transparency block and a non-transparency block adhered to the transparency block, At least one portion of the rearwardly facing side of the transparency block gently slopes for- ward. When the switch is in the ON-state, the light source is acti- vated and emits light which enters the transparency block. As the light enters the block, is is reflected by the rearwardly facing side of the transparency block and is guided to the top surface of the trans- parency block and radiated therefrom within a wide range. Thus, when an operator observes she top surface of the switch from an oblique angle, the radiated light is clearly visible.
535945
Itoyama Katumi
Suda Koichiro
Takahashi Yoshiya
Kabushiki Kaisha Toshiba
Sim & Mcburney
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