JPS61251356A - Image input device - Google Patents

Abstract

PURPOSE:To permit the image input of various manuscript by allowing the self-running of an image input device. CONSTITUTION:When a pulse motor 1 is driven, a carrier roller 11 fixed to a machine frame 20 is driven through a timing pulley 7 and a timing belt. A photoelectric conversion element 5, an image forming device and a light source 10 for illumination which are unified integrally move together of the manuscript 12 by self-running. Therefore, a reading point A moves on the manuscript 12 to read the entire image of the manuscript 12.

Description

[Detailed Description of the Invention] [Table of Contents] Overview Industrial Application Fields Conventional Technology Problems to be Solved by the Invention Means for Solving the Problems Actions Examples Effects of the Invention [Summary] Electrical conversion of originals such as images In an image input device that converts into a signal, a photoelectric conversion element and an image forming means for forming an image of a document on the photoelectric conversion element are integrated, and a drive source for driving these is also built in. This is configured to be self-propelled, making it easy to input various manuscripts such as large-screen images.

[Industrial application field]

The present invention relates to an image input device used in optical character reading devices (OCR), facsimiles (FAX), and the like.

OA equipment such as personal computers, word processors, and facsimile machines has become widespread, and as the bit unit cost of recording media such as floppy disks and memories has fallen, various types of image processing have come into practical use.

At the same time, the images that are subject to image processing have diversified, and conventional image input devices, such as large-screen originals, are no longer able to handle them. In addition, miniaturization of image input devices,
There is also a growing demand for lower prices.

[Conventional technology]

Conventional image input devices include an original transport type and a flatbed type. In a document conveying type image input device, a document is moved relative to a group of photoelectric conversion elements arranged in a negative column, thereby reading the document. A flatbed image input device, like the image input device of an electronic copying machine, places an original on a glass plate and moves an optical system under the glass plate to read the original one after another. .

[Problem that the invention seeks to solve]

With this conventional document-feeding type image reading device, not only the size of the document is limited, but also the thickness and shape of the document.Furthermore, if the paper is of poor quality, it may not be possible to feed it smoothly. The problem was that the manuscript itself had major limitations.

In addition, although the operability of flatbed image reading devices has been considerably improved, the devices are expensive because parts that require precision, such as the optical system, must be moved, and miniaturization is difficult. have.

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an image input device that has a simple configuration and can handle a variety of originals.

[Means for solving problems]

In order to solve the above problems, the present invention provides an image input device that converts a document such as an image into an electrical signal, which includes a photoelectric conversion element and an imaging means for forming an image of the document on the photoelectric conversion element. In addition to integrating them, a drive source for driving them is also built in, so that they can be self-propelled.

[Effect]

As a result, the image input device itself can be freely run over various documents of various sizes and read images, so that it can be used as an image input device for a wide variety of documents.

〔Example〕

The attached drawings show an embodiment of the present invention. In the figure, 5 is a photoelectric conversion element, for example, a CCD or the like is used. For this photoelectric conversion element 5, an imaging means consisting of a lens 6, a mirror 9.9, etc. is provided. This may be any device for focusing the image of the reading point A of the original 12 on the photoelectric conversion element, and is not limited to a lens or a mirror.

A light source 10.10 for illuminating the original, such as a fluorescent lamp, is provided adjacent to the original 120 point A. This light source is an LED
It goes without saying that various light sources such as arrays, incandescent lamps, etc. can be used. These photoelectric conversion elements, image forming means, and light source for document illumination are placed in a box-shaped machine frame 20 and have an integral structure. A drive source 1 consisting of a pulse motor etc. is further integrally attached to the machine frame 20, and this is used for timing and
The pulley 7 drives a conveyance roller 11 fixed to the machine frame 20 via a timing belt 8. Note that 2 is a substrate to which the photoelectric conversion element is fixed, and in addition, a driver for the photoelectric conversion element, an amplifier, a pulse motor driver, a driver for a light source such as an LED, an interface circuit, etc. are provided. The output from the photoelectric conversion element 5 is supplied to the image processing device 21 via the connector 3 and the cable 4.

Now, when the pulse motor 1 is driven, the conveyance roller °11 fixed to the machine frame 20 is driven by the timing pulley 7 and the timing belt 8. The photoelectric conversion elements move together on the document 12 by themselves.

Therefore, the reading point A moves on the original 12, and the entire image of the original 12 is read.

The original 12 may be large, such as a full-sheet size, or may be small.

When the size of the original 12 is larger than the image input device, the image input device is moved while dividing the original 12 into a large number of parts. When the document 12 is small and its width is smaller than the reading width of the image input device, the input operation is completed by moving - times. The reading width of the image input device can be designed in various ways, for example, 200 mm.
Tsuru level is often used.

Note that the same effect can be obtained by using a contact type image sensor such as α-8i (amorphous silicon), a selfoc lens, etc. in place of the lens, mirror, or CCD.

〔Effect of the invention〕

As described above, according to the present invention, since the image input device is made self-propelled, it is very easy to manually image various documents, and the structure is very simple and therefore inexpensive.

[Brief explanation of the drawing]

The drawing is a configuration diagram of an embodiment of the present invention. 1-Pulse motor 5-Photoelectric conversion element 6- Lens 7-Timing pulley 8-
Timing belt 9 - Mirror 10 - Light source for illumination 11 - Conveyance roller 12 - Original 20 - Machine frame

Claims (1)

[Scope of Claims] An image input device that reads an image by changing its relative positional relationship with a document, converts it into an electrical signal, and outputs it, comprising: a drive source, a light source for illuminating the document, and a photoelectric conversion device. 1. An image input device characterized in that an element and an image forming means for forming an image of a document on a photoelectric conversion element are integrated, and the device is configured to read the document while being self-propelled by the drive source.