Contact image sensor and roller mounting structure for scanners

Claim 1

A contact image sensor and roller mounting structure, comprising: two end supports, each end support comprising a sliding slot, a locating hole, a plug hole, a spring holder, an axle housing, and a locating post for mounting; two roller holders respectively mounted on said end supports to hold a roller, each roller holder comprising an axle housing mounted in the sliding slot of one end support, a locating pin inserted into the axle housing of one end support, and a locating hole; a roller having two opposite ends respectively fitted into the axle housings of said roller holders; a contact image sensor having two opposite ends respectively fastened to the locating holes of said end supports, and being disposed in contact with said roller; two torsional springs respectively mounted on the spring holders of said end supports, each having one end fastened to the plug hole of one end support and an opposite end stopped at the axle housing of one roller holder and the axle housing of the respective end support; a top cover connected between said roller holders and covered over said roller, having two locating holes at two opposite ends respectively fastened to the locating holes of said roller holders by a respective fastening element, and a longitudinal series of arched contact surface portions fitting the periphery of said roller; and a motor mounted on one end support and coupled to one end of said roller for turning it to deliver a document.