| 摘要 |
A carriage guide structure for an image-reading device that includes an optical unit, a light source, and a photoelectric conversion device on a carriage that is movable to scan a document placed on the image-reading device in order to sequentially read data from the document is disclosed. The carriage guide structure includes a casing for housing the carriage. The carriage is supported in the casing by guide rods, a guide rod and a roller or rollers, or, alternatively, only by rollers. A roller on one side portion, or on both side portions, of the carriage may engage a bottom plate or one or both sides of the casing to guide the carriage, and the rollers may act as supporting rollers. Additional receiving rollers may be mounted on a bottom portion of the carriage, adjacent supporting rollers, and engage the bottom plate of the casing.
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