Friction wheel and friction wheel module using same

Abstract

The invention relates to a friction wheel and a friction wheel module using the same. The friction wheel is used for providing friction force for separating files in an automatic paper feeder. The friction wheel can rotate unidirectionally, and the contact surface of the friction wheel is switched by use of the unidirectional rotation. According to the invention, the friction wheel does not rotate during a paper feeding process and contacts with files through the designated contact surface. Moreover, the friction wheel also can be rotated so as to switch the contact surface in contact with the files.

Description

technical field [0001] The invention relates to a friction wheel, in particular to a friction wheel applied in an automatic document feeder. Background technique [0002] Generally speaking, automatic document feeders are used in conjunction with scanners to facilitate scanning of a stack of documents. The automatic document feeder is provided with a paper-feeding module, which is used to move a stack of documents from the paper tray where the documents are placed to a feeding direction to enter the automatic document feeder. During the document feeding process, in order to ensure that each time There is only one document fed into the automatic document feeder. In addition to setting a paper separation roller in the paper pickup module, a friction plate needs to be installed under the paper separation roller to provide friction for the document in contact with the friction plate. , so that the friction between the document in contact with the paper module and the paper modu...

AI Technical Summary

Problems solved by technology

[0004] However, the friction wheel has the same disadvantage as the friction plate, that is, there is no way to remind the user of the wear of the friction wheel or the friction plate

Generally, when the friction wheel or friction plate has been worn out to the point where it cannot move normally, the friction wheel or friction plate can usually still move, but the probability of double feeding will be greatly increased.

By the time the user finds that the friction wheel or the friction plate has been severely worn, the automatic document feeder has been double-fed many times, that is, some documents will not be scanned

At this time, it is necessary to manually check which documents have been double-fed and rescan the documents that have been double-fed, which is quite labor-intensive and time-consuming.

Images