JPS62249553A - Image reader - Google Patents

Abstract

PURPOSE:To effectively read out an original and to reduce the size of a device by reading out the picture information of the original by a device constituted so as to carry the original to a sheet member reader to read out the picture information of the sheet member. CONSTITUTION:The reader is arranged on the lower side of a display window 7 in the moving direction of the sheet member 1, a light source 10 is arranged on the picture information entering surface side of the member 1, light from the light source 10 is reflected by the sheet member 1, the reflected light is reached an equal magnification type reading sensor 12 through a refractive index distribution type lens array 11, and the picture information of the member 1 is formed on a light receiving cell of the sensor 12. When an original 13 is inserted from an inlet 17, the original 13 carried at a constant speed by rollers 14, 15 while being guided by a guide member 16 and the sheet member 11. When the original 13 passes the position of the reading member at the constant speed, light is irradiated from the light source 10 to the original 13 and the image of the reflected light is formed on the light receiving cell of the sensor 12. The original 13 is guided by a guide member 19 and discharged 18.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an image reading device that reads image information written on a sheet member or a manuscript.

<Prior Art> In recent years, so-called electronic blackboards have been developed in order to save time and effort in transcribing graphic information written on blackboards during meetings and the like.

This electronic blackboard uses a reading means to read image information written on a sheet surface forming a board, transmits the signal to a recording means, and records it on a recording paper or the like.

In the above-mentioned electronic blackboard device, when reading the image information written on the original, the original is pasted on the sheet surface, and the sheet member is moved so that the original is read when it passes the reading means position. Alternatively, the reading means is configured to scan the surface of the document, and the image information of the document is read by the scanning.

<Problems to be Solved by the Invention> However, in the configuration for reading the original, the former configuration requires a lot of effort to paste the original onto the sheet surface, and it is difficult to ensure that the original is pasted. Otherwise, the document may be damaged or misread when the sheet is moved. Furthermore, in the latter configuration, since a moving means is required for scanning the reading means, there are problems in that the configuration becomes complicated and the cost increases.

The present invention solves the above-mentioned conventional problems and provides an image reading device that can be applied to the electronic whiteboard device, has a simple configuration, and can reliably read documents.

Means for Solving the Problems> Means of the present invention for solving the above-mentioned conventional problems includes a writable sheet member, a moving means for moving the sheet member, and a moving means provided on the moving path of the sheet member. The present invention is characterized in that it is provided with a reading means for conveying the document to the position of the reading means, and a conveying means for conveying the document to the position of the reading means.

Effect> According to the above means, the image information written on the sheet member can be read by the reading means while moving the sheet member. Further, when reading the image information of the original, the original is transported by the transport means, and the original can be read by the reading means when the original passes the reading means position.

<Embodiment> Next, an embodiment of an image reading device to which the above means is applied will be described.

FIG. 1 is a schematic cross-sectional explanatory diagram of an embodiment applied to an electronic whiteboard device.

In the figure, 1 is a sheet member that forms the board surface of the blackboard, and is constructed by coating a base made of polyethylene terephthalate, polypropylene, polyester, etc. with Teflon or silicone. are wrapped around each.

Drive rollers 4.5, which are driven and rotated by a motor (not shown), are pressed into contact with the winding rerollers 2, 3 with appropriate contact pressure via the sheet member 1, and when the drive rollers 4, 5 rotate, winding is performed by frictional transmission. The roller 2.3 is arranged to rotate, thereby moving the sheet member 1 in the direction of the arrow a. Note that the drive roller 4,
Even if the winding amount of the sheet member 1 changes and its diameter changes, the roller 5 moves to follow the amount of change and is configured so as to always be in pressure contact with the sheet member 1 with an appropriate contact pressure.

Further, the sheet member 1 is exposed through a display window 7 provided in the exterior 6, on which predetermined writing can be written using a pen or the like, and the written image information is read by a reading means.

In addition, in the figure, 8 is a plate-shaped member that supports the back surface of the sheet member 1, and 9 is a guide roller that guides the sheet member 1.

Next, the means for reading the image information written on the sheet member l will be explained. This reading means is the display window 7.
A light source 10 is disposed on the downstream side in the moving direction of the sheet member 1 and on the image information writing surface side of the sheet member l, and the light irradiated onto the sheet member 1 from the light source IO illuminates the sheet member 1.
The reflected light is reflected by the gradient index lens array 11.
It is configured such that the image information on the sheet member 1 is transmitted to the same-magnification type reading sensor 12 via the sensor 12, and the image information on the sheet member 1 is imaged on the light-receiving cell of the sensor 12.

Further, a sheet-like original 8113 is placed at the position of the reading means.
is configured to be conveyed along the sheet member 1. This document conveyance means includes a document conveyance roller 14 and a document discharge roller 15, which are driven and rotated by motors (not shown), and driven rollers 14a and 15a that are in pressure contact with these rollers.
are disposed upstream and downstream in the moving direction of the sheet member 1 with the reading means in between, and a guide member I6 is disposed along the sheet member 1 between both rollers 14 and 15. still,
A window 16a is provided in the guide member 16 so as not to block light irradiation from the light source IO to the original 13.

Further, a document insertion port 17 and a document discharge port 18 are provided in the portions of the exterior 6 located near the transport roller 14 and the discharge roller 15, respectively, and a guide member 19 is also provided between the discharge roller 15 and the discharge port 18. ing.

Next, the operation of reading the image information of the original 13 using the apparatus configured as described above will be explained.

When the original 13 is inserted through the insertion opening 17, the original 13 is conveyed at a constant speed by the rollers 14, 15 while being guided by the guide member 16 and the sheet member 1. When the original 13 passes through the reading means position at a constant speed, the original 13 is irradiated with light by the light source 10, and the reflected light is imaged on the light receiving cell of the reading sensor 12 via the lens array 11. .

The image information of the document 13 is read in the above manner, and the document 13 from which the image information has been read is guided by the guide member 19 and discharged from the discharge port 18 .

Incidentally, in the above-mentioned embodiment, an example was shown in which the image information of the original 13 is read by a light-reflecting type, but it may also be read by a light-transmitting type.For example, the sheet member l and the original 13 may be made of a light-transmitting material. However, as shown in FIG. 2, the light from the light source 10 may be transmitted through the original 13 and the sheet member 1, reach the reading sensor 20, and be imaged on the light receiving cell of the sensor 20.

In this case, the light transmittance of the sheet member 1 and the original 13 corresponds to the brightness of the light source IO and the vibration of the reading sensor 20,
As long as the sheet member 1 can be read, it does not necessarily have to be transparent. If the sheet member 1 is a transparent sheet, the color of the plate member 8 will match the color of the ink etc. written on the sheet member l. It is preferable to use a color that contrasts with the other colors.

Further, in the embodiment described above, both ends of the sheet member 1 are wound around the winding rollers 2 and 3, respectively, but in another embodiment, the sheet member is constructed in the shape of an endless belt, and the sheet member is configured to be rotated. Of course it is okay to do so.

Also, in the above embodiment, an example was shown in which a 1-magnification type reading sensor was used, but it is also possible to use a reading sensor smaller than the width of the sheet member l by using a reduction lens in the optical system. It is.

<Effects of the Invention> As described above, the present invention is configured such that the original is conveyed to the reading means position of the sheet member, so that the image information of the original can be read by the reading means for reading the image information of the sheet member. In addition, there is no need to attach the original to a sheet member or the like as in the past, and there is no need to move the reading means, so the configuration is simple and the original is not damaged. This device has features such as being able to guide the user and making the entire device more compact.

[Brief explanation of drawings]

FIG. 1 is an explanatory schematic cross-sectional view of an embodiment of the present invention applied to an electronic whiteboard, and FIG. 2 is an explanatory diagram of an embodiment in which the reading means is of a light-transmissive type. 1 is a sheet member, 2.3 is a winding shaft, 4.5 is a drive roller, 6 is an exterior, 7 is a display window, 8 is a plate member, 9 is a guide roller, 10 is a light source, 11 is a lens array, 12 is a reading sensor, 13 is a document, 14 is a transport roller, 14a
1 is a driven roller, 15 is a discharge roller, 15a is a driven roller, 16 is a guide member, 17 is an insertion port, 18 is a discharge port, 1
9 is a guide member, and 2o is a reading sensor.

Claims (3)

[Claims] (1) It has a writable sheet member, a moving means for moving the sheet member, a reading means provided on a moving path of the sheet member, and a conveying means for conveying the original to the position of the reading means. image reading device. (2) The image reading device according to claim 1, wherein the reading means is a light reflection type reading sensor. (3) The image reading device according to claim 1, wherein the sheet member forms a guide for a document to be conveyed.