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    • 40. 发明授权
    • Portable terminal
    • 便携式终端
    • US08207464B2
    • 2012-06-26
    • US12594129
    • 2008-06-25
    • Masaru MatsumotoKimiaki Imai
    • Masaru MatsumotoKimiaki Imai
    • H01H13/70
    • H01H13/83G06F3/0202H01H13/84H01H2209/004H01H2209/082H01H2217/012H01H2219/044H01H2219/062H01H2221/004H01H2221/05H04M1/22H04M1/23
    • In a portable terminal, a plurality of operation keys 7 are formed in a key through hole, which is formed in a housing main body that covers a printed board 15, by partitioning a stainless steel sheet 26 (a key sheet) by slits 26a. A urethane sheet 28 is attached to the rear side of the stainless steel sheet 26, where the urethane sheet 28 has ridge portions 28a that bulge out through the slits 26a to the front side of the stainless steel sheet 26, and the rear sides of the ridge portions 28a have groove-like openings. A rubber layer 29 is attached to the rear side of the urethane sheet 28, where the rubber layer 29 has a plurality of protruding portions 23 that protrudes toward a substrate 25 at positions corresponding to a plurality of fixed contacts 16 over the substrate 25. LEDs (light emitting means) and a light guide sheet 21 are disposed closer to the substrate than the rubber layer 29 is. Recess grooves 29a (wrong operation preventing means), for preventing the operation keys 7 located adjacent to each ridge portion 28a from being depressed at the same time, are formed in the rubber layer 29 at locations corresponding to the rear sides of the ridge portions 28a. This implements the operation keys 7 that have a nice feel and are less likely to cause wrong operation, while uniformly guiding light from the LEDs to the operation keys 7.
    • 在便携式终端中,通过利用狭缝26a分隔不锈钢板26(钥匙片),形成在形成在覆盖印刷电路板15的壳体主体内的钥匙通孔中的多个操作键7。 聚氨酯片28安装在不锈钢片26的后侧,其中聚氨酯片28具有通过狭缝26a向不锈钢片26的前侧凸出的脊部28a, 脊部28a具有槽状开口。 橡胶层29附着在聚氨酯片28的后侧,橡胶层29具有多个突出部23,该突出部23在与衬底25上的多个固定触点16相对应的位置处朝向衬底25突出。LED (发光装置)和导光片21比橡胶层29更靠近基板设置。 在对应于脊部28a的后侧的位置处,在橡胶层29中形成有用于防止位于与每个脊部28a相邻的操作键7同时被压下的凹槽29a(错误操作防止装置) 。 这实现了具有良好感觉的操作键7,并且不太可能导致错误的操作,同时将来自LED的光均匀地引导到操作键7。