Patent ID: 7463913

Claim:
A slide mechanism of a portable device for relatively sliding a first casing and a second casing, which constitute the portable device, in a mutually superposed state to be openable/closable in a linear direction, comprising: a base member mounted on either one of the first casing and the second casing; a slider slidably engaged with said base member and mounted on the other of the first casing and the second casing; and a slide energizing means provided between said slider and said base member, wherein said base member has a pair of rail portions erected from its bottom surface part at its both side parts, which are structured so that said slider slides by abutting against the rail portions, wherein said slider is provided with guide portions contacting respective side parts of the rail portions at its side end parts, wherein recessed strip portions or projecting strip portions are provided to the respective rail portions on sides contacting the guide portions, and projecting strip portions or recessed strip portions which engage with the recessed strip portions or projecting strip portions are provided to the respective guide portions on sides contacting the respective rail portions, and wherein said slide energizing means is constituted of a rotary arm rotatably mounted on either one of said base member and said slider, and an energizing member mounted on the other of said base member and said slider, allowing the first casing and the second casing to automatically open/close from a predetermined opening/closing position by acting on the rotary arm to energize the rotary arm to rotate from a predetermined rotary position to both of right and left directions.