KR20070073433A - Scanner - Google Patents

Abstract

A scanner is provided to realize a high quality scanning image by restricting moving of a document during carry, as the document is carried in a straight line when the document enters a guide path from the first carrier or enters the second carrier from the guide path. The first carrier(121) carries the document(P) to a scanning unit side. The second carrier(122) discharges the document passing a scanning unit(110). The guide path(123) guides carrying the document between the first and second carrier. The first and second carrier includes a carrying roller(121a,122a) and a carrying belt(121b,122b) operated by contacting with the carrying roller. The carrying belt is arranged to input the document to the guide path from the first carrier in the straight line and input the document to the second carrier from the guide path. The first and second carrying belt is rotated by receiving driving power from the first and second carrying roller.

Description

Scanner {SCANNER}

1 is a view schematically showing a typical scanner,

2 is a view schematically showing a scanner according to an embodiment of the present invention;

3 is an enlarged view illustrating a state in which an original is transferred from the first transfer unit to the guide path, and

4 is an enlarged view illustrating a state in which an original is transferred from the guide path to the second transfer unit.

<Description of the reference numerals for the main parts of the drawings>

110: scan unit 111: document glass

120: transfer unit 121: first transfer unit

121a: first feed roller 121b: first feed belt

122: second feed part 122a: second feed roller

122b: second conveyance belt 123: guide path

The present invention relates to a scanner, and more particularly, to a scanner having a transfer unit capable of preventing shaking during document transfer.

In general, a scanner scans an image of an original, and is divided into a method of scanning an image of an original placed on a transparent platen glass and a method of scanning an original sheet fed by a transfer unit. 1 schematically shows a scanner with a transfer unit 20.

As shown in FIG. 1, the scanner includes a scan unit 10 for scanning an image of an original P passing through the document glass 11, and a transfer unit for transferring the original P to the scan unit 10. 20).

The transfer unit 20 may include a first transfer unit 21 for transferring the original P to the scan unit 10, and a second transfer unit 22 for discharging the original P via the scan unit 10 to the outside. And a guide path 23 provided between the first and second transfer parts 21 and 22 to guide the transfer path of the document P. Here, the first and second conveying portions 21 and 22 are each composed of a pair of rollers 21a and 22a, and any one of the pair of rollers receives idle driving force from the other roller. It consists of a roller.

However, the first and second conveying portions 21 and 22 are constituted by a pair of rollers 21a and 22a, so that the first and second conveying portions 21 and 22 between the first and second conveying portions 21 and 22 and the guide path 23 are separated. The manuscript (P) of the document is not smooth.

Specifically, when the document P exits the first conveying part 21, the document P collides with the guide path 23 by its own weight, and then flows into the guide path 23 and moves away from the guide path 23. When flowing into the 22, first collides with any one of the pair of rollers 22a and then flows between the rollers 22a.

Such a collision of the originals P causes shaking of the conveyed originals P, which causes scan image quality deterioration such as distortion, shake and distortion of the scanned image.

The present invention has been made in view of the above, and an object thereof is to provide a scanner having a transfer unit capable of preventing shaking during document transfer.

A scanner according to the present invention for achieving the above object is a scanning unit for scanning an image of a document; And a conveying unit which conveys the document to be passed through the scanning unit, wherein the conveying unit comprises: a first conveying unit which conveys the document to the scanning unit; A second transfer unit for discharging an original via the scanning unit; And a guide path installed between the first and second transfer parts to guide the transfer of the document. The first and second conveying parts each include a conveying roller and a conveying belt which is in contact with the conveying roller.

According to a preferred embodiment of the present invention, the conveyance belt is preferably arranged such that the document flows in a straight line from the first conveying portion to the guide path and also flows in a straight line from the guide path to the second conveying portion.

Here, the first and second conveyance belt is preferably rotated by receiving a driving force from the first and second conveying roller.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 2, the scanner according to an embodiment of the present invention includes a scan unit 110 and a transfer unit 120.

The scanning unit 110 scans an image of the document P passing through the document glass 111. The scan unit 110 includes an optical sensor such as a contact image sensor (CIS) or a charge coupled device (CCD) that detects light reflected from the original P by irradiating light onto the original P. Since the technical configuration of the scan unit 110 can be understood from a known technology, detailed description and illustration are omitted.

The transfer unit 120 transfers the document P for the scanning operation. The transfer unit 120 includes a first transfer unit 121 for transferring the original P to the scan unit 110, and a second transfer unit 122 for discharging the original P via the scan unit 110 to the outside. And a guide path 123 installed between the first and second transfer parts 121 and 122.

The first conveying unit 121 is composed of a first conveying roller 121a and a first conveying belt 121b which meshes with and rotates with the first conveying roller 121a. The first conveyance belt 121b is supported by a pair of first support rollers 121c to travel.

Like the first transfer unit 121, the second transfer unit 122 is composed of a second transfer roller 122a and a second transfer belt 122b which meshes with the second transfer roller 122a and rotates. The second conveyance belt 122b is also supported by a pair of second support rollers 122c.

Here, the first and second transfer rollers 121a and 122a of the first and second transfer units 121 and 122 receive a driving force by a driving means not shown, such as a drive motor, and the first and second transfer rollers 121a and 122a. The second conveyance belts 121b and 122b are rotated by receiving a driving force from the first and second conveying rollers 121a and 122a.

However, the present invention is not necessarily limited thereto, and the first and second transfer belts 121b and 122b may receive the driving force from the driving means and transfer the driving force to the first and second transfer rollers 121a and 122a. In addition, another modified embodiment is possible such that both the first and second feed rollers 121a and 122a and the first and second feed belts 121b and 122b receive a driving force from the driving means.

The guide path 123 transfers the documents introduced from the first transfer unit 121 to pass through the scan unit 110 and then discharges the originals to the second transfer unit 122. Here, although not shown in the guide path 123, a plurality of rollers are disposed in place to guide the transfer of the document.

On the other hand, the original (P) transfer direction of the first and second transfer belt (121b, 122b) and the original (P) inlet and discharge direction of the guide path 123 is connected in a straight line without breaking.

Specifically, as shown in FIG. 3, the first conveyance belt 121b is disposed to flow into the guide path 123 in a straight line from the first conveying portion 121. In addition, as shown in FIG. 4, the second conveyance belt 122b is disposed so that the document P flows in a straight line from the guide path 123 to the second conveying portion 122.

The document transfer operation of the scanner having the above configuration will be described with reference to FIGS. 2 to 4.

As shown in FIG. 3, the document P passes through the first feed roller 121a and the first feed belt 121b of the first feed part 121 and then flows into the guide path 123. do. At this time, the document P is conveyed in a straight line by the conveying surface of the first conveying belt 121b, and flows into the adjacent guide path 123 while maintaining the straight conveying direction.

The document P introduced into the guide path 123 is transferred along the guide path 123 and is scanned via the scanning unit 110 to scan an image. The document P on which the image is scanned is continuously conveyed and discharged to the second conveying unit 122 side. In this case, the document deviating from the guide path 123 flows in a straight line into the second conveyance belt 122b of the second conveying portion 122.

For this reason, the occurrence of shaking due to the collision that occurred when the document P was introduced or discharged into the guide path 123 is suppressed.

According to the present invention as described above, when the document is introduced into the guide path from the first conveying portion or flows into the second conveying portion from the guide path, it can be introduced in a straight line, thereby preventing the collision of the original during conveyance. As a result, the shaking during the conveyance of the original is suppressed, and a high quality scan image can be realized.

While the invention has been shown and described in connection with the preferred embodiments for illustrating the principles of the invention, the invention is not limited to the construction and operation as shown and described. Rather, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims. Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

Claims (3)

A scanning unit for scanning an image of an original; And In the scanner comprising: a transfer unit for transferring the document to pass through the scanning unit, The transfer unit, A first transfer unit for transferring the original to the scan unit; A second transfer unit for discharging an original via the scanning unit; And And a guide path installed between the first and second transfer parts to guide the transfer of the document. And the first and second conveying portions each include a conveying roller and a conveying belt which is in contact with the conveying roller. The method of claim 1, The conveying belt is a scanner, characterized in that the document is arranged to flow in the guide path in a straight line from the first conveying portion and in a straight line into the second conveying portion from the guide path. The method according to claim 1 or 2, The first and second conveyance belt is a scanner, characterized in that the rotation by receiving a driving force from the first and second conveying roller.

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