JPS63109651A - Original reader - Google Patents

Abstract

PURPOSE:To simplify the constitution of an original reader equipped with a mirror and to make the weight light by constituting an original reader main body by a resin and plating a wall face in the main body of the mirror. CONSTITUTION:The original reader main body 1 is made of a resin to reduce the weight and the cross section of the whole shape is formed nearly hexagonal. A plastic plating processing with high reflection is applied to each face (original reader main body inner wall face) of bent faces 1a-1c to form a mirror part playing a role of a mirror provided in a conventional original reader main body. The inside of the original reader 1 is provided with a reflector 3, a lamp 4, a lens 5 and a CCD sensor 6. Thus, the reader is constituted with light weight simply and the original reader is driven sufficiently even with a small drive power from the drive source at scanning and the entire power consumption of the copying machine is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Al Industrial Field of Application) This invention relates to an original image mirror and a lens.
The present invention relates to a document reading device that reads an original using a CCD sensor.

(b) Prior Art Some small-sized copying machines read an image of a document using a document capture device equipped with a CCD sensor that scans the surface of the document. This document reading device condenses light reflected from the document surface by a light source that illuminates the document surface through a mirror and a lens, and reads the condensed reflected light from the document surface using a CCD sensor.

2. Description of the Related Art Conventionally, there is a document reading device having a configuration as shown in FIG.

FIG. 2 shows a schematic cross-sectional view of a document reading device provided in a small-sized digital copying machine with a fixed document table.

The document reading device is disposed at the upper part of the main body of the copying machine (not shown), and is placed on the document table 29 as shown in FIG.
It is possible to scan in the direction of arrow P at a position below the original 30 placed on R.

This document reading device has a reflector 22. Lamp 23. Mirror 24, 25.
26. It is equipped with a lens 27 and a CCD sensor 28. The document reading device main body 21 has an opening 21a on its box-shaped upper surface, and from this opening 21a, the light of the lamp 23 is directed onto the document surface. The lamp 23 is located at the other focal point and has a cross-sectional shape that is a part of an ellipse, and the light from the lamp 23 is focused on the upper surface of the document table.The light reflected from the lamp 23 from the document surface is reflected from the opening. 21a and is reflected by mirrors 24, 25, and 26 in this order.

Further, the light passes through a lens 27 and is focused on a CCD sensor 28 . The lens 27 is arranged at a position where the light reflected from the document surface of the lamp 23 emitted from the opening 21a is focused on the light receiving surface of the CCD sensor.

Further, when the document reading device scans the lower side of the document surface in the direction of arrow P, the opening 21a moves along the document surface, and the image of the entire document surface is read by the light receiving surface of the CCD sensor 28.

(C) Problems to be Solved by the Invention However, the conventional document reading device described above is constructed by disposing a mirror at a predetermined position within the main body of the document reading device, and it takes time and effort to attach this mirror during manufacturing. There is an inconvenience that it takes. In addition, when a document reading device scans, such as a copying machine with a fixed document table, as in the example above, if a mirror or the like is installed inside the reading device, the weight of the document reading device increases, and the copying machine The disadvantage was that the power consumption was large.

In view of the above-mentioned conventional drawbacks, an object of the present invention is to reduce the weight of the document reading device by configuring the mirror of the document reading device by plating the resin surface, and to reduce the weight of the document reading device when it is attached to a copying machine or the like for scanning. It is an object of the present invention to provide an inexpensive document reading device with a simple configuration while preventing an increase in the power consumption of the device.

The apparatus is characterized in that the original reading apparatus main body is made of resin, and the mirror is formed by plating a wall surface inside the original reading apparatus main body.

(e) Function In the document reading device according to the present invention, the main body of the document reading device is made of resin, and the mirror is formed by plating the wall surface inside the main body of the document reading device, thereby reducing the weight of the entire document reading device. Ru. In addition, since it is light in weight, the document reading device can scan the document surface with low driving force.

(r), Embodiment FIG. 1 is a schematic cross-sectional view of a main part of a copying machine with a fixed document table equipped with an original fi% reading device, which is an embodiment of the present invention.

Reference numeral 2 denotes a document table, which is made of transparent glass. A document 7 is placed on the document table 2 at a predetermined position. A document reading device is arranged below this original fΔ table 2.

This document reading device differs from the conventional document reading device shown in FIG. 2 in terms of its configuration. In the document reading device of this embodiment, the document reading device main body 1 is made of resin to reduce weight, and as shown in FIG. Each surface (the inner wall surface of the document reading device main body) is plated with highly reflective plastic to form a portion of the mirror that functions as a mirror provided inside the conventional document reading device main body. The document reading apparatus main body 1 includes a reflector 3, a lamp 4, a lens 5, and a CCD sensor 6 as in the prior art.

With this configuration, in the document reading device of this embodiment, the reflected light from the document surface is directed to the document reading device main body 1.
The bent surface 1a passes through the opening 1d and forms a part of the mirror.
, 1b, and IC in this order, and further passes through the lens 5 to be focused on the CCD sensor 6. This reflected light is read by the light receiving surface of the CCD sensor 6 as an original image. Further, as this document reading device is scanned in the direction of arrow P by a drive source (not shown), images of the entire document surface are sequentially read by the CCD sensor 6.

In this way, in the document reading device of this embodiment, the main body of the document reading device is made of resin, and a portion of the mirror, which plays the same role as a conventional mirror, is plated with highly reflective plastic on the curved surface with a roughly hexagonal cross section. Because of this, part of the mirror can guide the reflected light from the original to the lens as described above. In addition, since the main body of the document reading device is made of resin, and only a portion of the mirror is formed with plastic plating on the surface of this resin, the document reading device can be lightweight and have a simple structure, making it possible to read documents easily. Even if the driving force from the driving source during scanning of the apparatus is small, the apparatus can be driven sufficiently, which has the advantage of reducing the power consumption of the entire copying machine.

(g) Effects of the Invention As described above, according to the present invention, the main body of the document reading device is made of resin, and the mirror is formed by plating the inner wall surface of the main body, so that the structure of the document reading device including this mirror is improved. It has the effect of being simple, inexpensive, and lightweight. Furthermore, when the document reading device is driven to scan the surface of the document, since the document reading device is lightweight, scanning can be performed with low driving force, which has the effect of reducing power consumption.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a copying machine with a fixed document table, which is equipped with a document reading device according to an embodiment of the present invention. FIG. 2 is a sectional view of a main part of a copying machine with a fixed original table plate equipped with a conventional original reading device. 1-Document reading device main body, LA, LB, LC-plated surface (mirror part), 5-lens.

Claims (1)

[Claims] (1) In an apparatus in which an original image is read by a CCD sensor through a mirror and a lens, and these are stored in a main body of the original reading apparatus, the main body of the original reading apparatus is made of resin, and the mirror is attached to a wall surface inside the main body of the original reading apparatus. A document reading device characterized by being configured by plating.