JPS62209517A - Copying device - Google Patents

Abstract

PURPOSE:To eliminate the assembling work of an auxiliary illuminating reflective mirror by providing a reflective mirror and a device body as one body. CONSTITUTION:A reflective tape is stuck or a reflective paint is applied to a depressed base 10 extended as one body from the upper edge of a frame 7' facing a frame 7, which is provided with a lens 5, on the side of a light source 3 to form a reflective surface 11, thereby obtaining a reflective mirror 9 which faces the light source 3 with the lens 5 between them and reflects a part of the light beams from the light source 3 toward an original 4 to attain auxiliary illumination. A light distribution control plate 12 which uniforms the light beams going from the light source 3 to the reflective mirror 9 is extended as one body from the upper edge of the light source-side frame 7 provided with the lens 5. This light distribution control plate 12 is lower in both end parts and is higher toward the center part to control the quantity of light in the center part to both end part sides, because the quantity of light of a fluorescent lamp used as the light source 3 is smaller in both end parts in comparison with the center part.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a copying apparatus in which the shadow of a document can be erased during pasting.

[Scene of invention]

If the document placed on the platen glass is original paper with paper strips pasted on it, there will be a step between the original paper and the pasted paper strips, so if the light source only applies light unilaterally, the light will not be There is a risk that a shadow will be formed on the step that is not hit, resulting in an insufficient amount of light, resulting in a black line being copied. Therefore, in order to ensure that the light rays hit the stepped portions that are far from the light source, conventionally, the exposure light source is equipped with a reflector that reflects the light rays from the light source toward the original document across the lens optical axis. It was used as an auxiliary illumination means to illuminate the original. The ratio of light from the auxiliary illumination (reflector) to the main illumination (light source) is said to be preferably 6:4 to 7:3, although it depends on the angle of the optical axis.

However, in the conventional case, the reflector was formed separately from the main body and fixed to the main body frame using many attachment parts, which made the 1Mi assembly work inefficient and hindered the reduction in price and compactness of the device. It had become.

[Purpose of the invention]

This invention is intended to solve the above problems, and therefore eliminates the work required to assemble a reflector that reflects a portion of the light rays from the light source toward the document from the opposite side of the light source, thereby reducing the cost and compactness of the device. It is an object of the present invention to provide a copying apparatus that can achieve the following.

[Structure of the invention]

In order to achieve the above object, the present invention provides a copying apparatus including a reflecting mirror in an exposure light source that reflects the light beam from the light source toward the document across the optical axis of the lens, in which the reflecting mirror is provided integrally with the frame. It is composed of

〔Example〕

Next, the present invention will be described based on embodiments shown in the accompanying drawings.

FIG. 1 shows a sectional view of the copying apparatus of the present invention.

In the figure, 1 is a main body, 2 is an original platen glass that moves on the main body 1, and 3 is an exposure light source consisting of a fluorescent lamp that irradiates the original 4 on the original platen glass 2.

The exposure light source 3 is installed between the side frames of the main body 1 together with a reflection plate 3a. 5 is a document 4 irradiated by the exposure light source 3;
The lens 5 is a lens (Selfoc) that focuses the reflected light from the photoreceptor drum 6 on the photoreceptor drum 6, and the lens 5 has a light shielding member 8, 8'
It is installed through. Reference numeral 9 denotes a reflecting mirror that sandwiches the lens 5 and reflects a portion of the light beam from the light source 3 toward the document 4 to obtain auxiliary illumination.
A reflective surface 11 is formed by pasting reflective tape or applying reflective paint on a concave curved table 10 integrally extended from the upper edge of the frame 7' opposite to the frame 7 of the light source in which the light source is installed. .

Reference numeral 12 denotes a light distribution regulating plate that equalizes the light rays traveling from the light source 3 to the reflecting mirror 9. The light distribution regulating plate 12 is integrally extended from the upper edge of the frame 7 on the light source side in which the lens 5 is installed. has been done. The light distribution regulating plate 12 is configured such that both ends thereof are low and as it goes toward the center, the light quantity becomes high. This is because the amount of light at both ends of the fluorescent lamp used as the light source 3 is less than that at the center.

Reference numeral 13 denotes a sensor provided on the back side of the reflector 9. The sensor 13 detects the amount of light from the light source 3 obtained through the groove 12' of the light distribution regulating plate 12 and the hole 9' of the reflector 9. The input voltage to the light source 3 can be adjusted based on the detection signal.

Reference numeral 14 denotes a shutter provided between the lens 5 and the photosensitive drum 6. When not exposed, the shutter 14 is closed as shown by the two-dot chain line in FIG. The external light that enters when the photoreceptor drum 6 is exposed is prevented from hitting the photoreceptor drum 6. This is to prevent the photosensitive drum 6 from becoming fatigued by the light rays when the light source 3 is turned on continuously during non-exposure to stabilize the amount of light.

In the above embodiment, the light beam from the light source 3 directly irradiates the original 4, while the light beam from the opposite side illuminates the original 4 through the reflecting mirror 9.
can be irradiated, and even if the original placed on the platen glass is a piece of paper pasted onto the original paper, there will be no shadows from the stepped parts of the paper piece, and there is no risk of black lines being copied. In this case, the light beams reflected by the nine reflecting mirrors 9 are regulated by the light distribution regulating plate 12, so that the amount of light at each part on the scanning line is constant.

〔Effect of the invention〕

As described above, the present invention is a copying apparatus including a reflecting mirror in an exposure light source that reflects a light beam from the light source toward a document across a lens optical axis, characterized in that the reflecting mirror is provided integrally with the main body. Therefore, the assembly work of the reflector for auxiliary illumination is omitted, and the excellent effect of reducing the cost and compactness of the device can be achieved.

[Brief explanation of drawings]

The figures show an embodiment of the invention, with Figure 1 being an overall sectional view and Figure 2 being an overall sectional view.
The figure is an enlarged sectional view of the main part, and FIG. 3 is a perspective view thereof. - Main body 2 - Original table glass 3 - Exposure light source (main illumination) 4 - Original 5 - Lens 7.7' - Opposing frame 9 for installing the lens - Reflector 10 - Concave table 11-・Reflective surface patent Applicant: Konishiroku Photo Industry Co., Ltd. Figure 3

Claims (2)

[Claims] (1) A copying apparatus including a reflecting mirror in an exposure light source that reflects light from the light source toward a document across a lens optical axis, wherein the reflecting mirror is provided integrally with a main body. (2) The copying apparatus according to claim 1, wherein the reflecting mirror has a reflecting surface formed on a concave curved table extending from the upper edge of the installation frame of the SELFOC lens.