| 摘要 |
PROBLEM TO BE SOLVED: To improve visibility of a key button.SOLUTION: A keyboard where a key button 11 supported by a housing 12 is arranged opposite to an operation detection part 15 on an axis line X along an operation direction of the key button 11, is provided with a light source L outside the operation detection part 15 on a substrate 30 seen from an axial direction of the axis line X. A light guide body 50 for guiding light from the light source L to a key top 110 of the key button 11 is composed by a material larger in refractive index than the air and is provided for the housing 12. The light guide body 50 comprises: an incident part 51 arranged opposite the light source L in the axial direction of the axis line X; and an emission part 53 arranged opposite the key top 110 at a position hidden by the key button 11 seen from the axial direction of the axis line X; and a guide part 52 for guiding light from the light source L made incident by the incident part 51 to the emission part 53. An incident plane 510 to be a surface opposite the light source L of the incident part 51 is formed into a curved surface shape protruding toward a light source L side.SELECTED DRAWING: Figure 2 |
