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Abstract

The invention discloses a printer / scanner and a cover plate assembly thereof. The cover plate assembly comprises a cover body; a back plate which is set at the side of the cover body close to a scanning window of the printer / scanner; and an auto document feeder which is set at one end of the cover body and is used for realizing auto document feed scanning. When flatbed scanning is carried out, theback plate covers an area of a document guide opening of the auto document feeder. When the flatbed scanning is carried out, the area of the document guide opening of the auto document feeder is covered by the back plate, so influence of the document guide opening on the scanning window can be avoided; and the scanning window of the auto document feeder and a flatbed scanning window can be integrated, so a size of a scanning platform in a length direction can be reduced, and the purpose of reducing the size of a machine is realized.

Description

technical field [0001] The invention relates to the technical field of printers, in particular to a scanner. Background technique [0002] At present, all-in-one machines or full-featured scanners generally have built-in automatic document feeders (Auto Document Feeder, ADF) and flatbed multi-function scanners. These two devices share a contact image sensor (ContactImage Sensor, CIS) or charge-coupled Device image sensor (Charge Coupled Device, CCD) scanning head (individually one scan double-sided with 2 scanning heads), such as figure 1 As shown, an ADF fixed scanning window 2 is specially opened on the side of the glass plate of the flatbed scanning window 1 (near the ADF end), that is, when the document is fed from the ADF3, the scanning head is fixed on this window to obtain the scanned data of each page; When scanning on a flatbed, the scanning head moves on the glass window on the other side to obtain scanning data. Usually, the length of the scanning platform is the...

AI Technical Summary

Problems solved by technology

[0002] At present, all-in-one machines or full-featured scanners generally have built-in automatic document feeders (Auto Document Feeder, ADF) and flatbed multi-function scanners. These two devices share a contact image sensor (ContactImage Sensor, CIS) or charge-coupled Device image sensor (Charge Coupled Device, CCD) scanning head (individually one scan double-sided with 2 scanning heads), such as figure 1 As shown, an ADF fixed scanning window 2 is specially opened on the side of the glass plate of the flatbed scanning window 1 (near the ADF end), that is, when the document is fed from the ADF3, the scanning head is fixed on this window to obtain the scanned data of each page; When scanning on a flatbed, the scanning head moves on the glass window on the other side to obtain scanning data. Usually, the length of the scanning platform is the small glass window on one side, which is ADF scanning window 2 (about 30mm) and the large glass window on the other side, which is flatbed scanning Window 1 (about 300mm, the length of a piece of A4 paper), plus the middle grid frame 4 (about 20mm), the total length is more than about 350mm. Due to the above-mentioned structure and size limitations, it is difficult to adjust the size of the scanner in the prior art. Further shrinking, it is difficult to meet the needs of miniaturization and low cost

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