公开(公告)号：US10217578B2

公开(公告)日：2019-02-26

申请号：US15555453

申请日：2016-02-25

申请人： TOPRE CORPORATION

发明人： Kazufumi Enomoto ,  Kenki Enomoto

IPC分类号： H01H13/83 ,  H01H13/02 ,  H01H13/70 ,  F21V8/00 ,  H01H9/18

摘要： In a keyboard, a keybutton opposes an operation detection portion. A light source is provided on an outer side of the operation detection portion. A light guide member guides light from the light source to a keytop of the keybutton. The light guide member includes an incident portion opposing the light source, an emitting portion opposing the keytop, and a guide portion which guides the light incident from the incident portion to the emitting portion. An incident surface of the incident portion is formed in a shape of a curved surface that protrudes to the light source side.