Patent ID: 8061703
Filing Date: 2011-11-22
Classification: B65H,H04N

Abstract:
1. A sheet-feeding type scanning apparatus for scanning a sheet article, said sheet-feeding type scanning apparatus comprising: a scanning module for scanning said sheet article when said sheet article is transported across a scan region, thereby obtaining an image of said sheet article; a first sheet input tray arranged at a first side of said scanning module for placing said sheet article thereon; a first sheet pick-up roller assembly arranged beside said first sheet input tray for feeding said sheet article that is placed on said first sheet input tray into an internal portion of said sheet-feeding type scanning apparatus; a sheet ejecting tray for supporting said sheet article after being scanned; a sheet transfer channel arranged between said first sheet input tray and said scan region for leading said sheet article; a plurality of transfer roller assemblies for transporting said sheet article; a sheet ejecting roller assembly arranged beside said sheet ejecting tray for transporting said sheet article to said sheet ejecting tray; a sheet-feeding sensor arranged at a second side of said scanning module for detecting said sheet article, wherein once said sheet article is detected by said sheet-feeding sensor, said sheet-feeding sensor is triggered to generate a disabling signal; and a clutch module connected to said sheet-feeding sensor for controlling whether power is transmitted to said first sheet pick-up roller assembly, wherein in response to said disabling signal, said clutch module is disabled such that an operation said first sheet pick-up roller assembly is terminated, wherein said clutch module comprises: a magnetic coil element for generating a magnetic force; a connecting part coupled to said magnetic coil element, and comprising a saw-toothed recess, wherein said connecting part is rotated with respect to said magnetic coil element or synchronously rotated with said magnetic coil element; and a metallic plate accommodated within said saw-toothed recess of said connecting part, and comprising a plurality of saw-toothed structures, wherein when said magnetic coil element is magnetized to generate said magnetic force, said metallic plate is attracted by said magnetic coil element and said saw-toothed structures of said metallic plate are engaged with the saw-toothed recess, so that said metallic plate is synchronously rotated with said magnetic coil element, wherein when said magnetic coil element is not magnetized, said metallic plate is accommodated within said saw-toothed recess, so that said connecting part is rotated with respect to said magnetic coil element.