03-04-2014 дата публикации
Номер: US20140092448A1
The present invention discloses a sheet feed scanner including an auto document feeder, a flatbed scanner and a power-switching mechanism. The power-switching mechanism includes a first shaft, a power source, a clutch, a first gear, a second gear, and an elastic limitation structure. The clutch includes a first incline and a second incline. The elastic limitation structure pushes the first incline or the second incline of the clutch. When the first shaft is rotated in a first direction, the first incline is pushed by the elastic limitation structure so that the clutch is coupled to the first gear for driving the automatic document feeder. When the first shaft is rotated in a second direction, the second incline is pushed by the elastic limitation structure so that the clutch is coupled to the second gear for driving the flatbed scanner. 1. A sheet feed scanner , capable of scanning a document , wherein the sheet feed scanner comprises: a top cover;', 'a pickup arm, disposed under the top cover and capable of swinging relative to the top cover, so as to feed the document into the auto document feeder; and', 'a feeding gear, connecting with the pickup arm;, 'an automatic document feeder, capable of feeding the document, wherein the automatic document feeder comprises;'} a scanning module, capable of reading an image of the document;', 'a scanning module gear, connecting with the scanning module; and', 'a stopping structure, capable of stopping the scanning module from moving; and, 'a flatbed scanner, disposed under the auto document feeder, and capable of scanning the document, wherein the flatbed scanner comprises a first shaft, comprising a protrusion portion;', 'a power source, capable of driving the first shaft to rotate;', 'a clutch, fitting onto the first shaft, and comprising a sliding groove, a first incline and a second incline, wherein the protrusion portion is disposed to the sliding groove, so as to enable the clutch to shift relative to the first shaft;', ...
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