JPS61172176A - Copying machine having function of copying additional information - Google Patents

Abstract

PURPOSE:To enable additional information to be coped without causing developer fogging in a portion of a liquid crystal of the copy by irradiation from the back of a transmission type liquid crystal display by the light from an exposure lamp by an optical system. CONSTITUTION:The optical system 18 of the additional information copying device 3 provided laterally of an original platen glass 2 is enclosed by a cover 6 and composed of four reflective mirrors 19, 20, 21 and 22. At the initial stage of exposure, the exposure lamp 14 irradiates a lighting window 7 and the light taken there is sequentially reflected by the mirrors 19 to 22 of the optical system 18 so as to fall on the liquid crystal 5 from directly above so that the additional information is copied by a scanning optical system 8 onto a photosensitive drum 15. A manuscript 24 placed with positioning at an end reference position 23 on the tray glass 2 is scanned in the direction a by the exposure lamp 21 so that the original image is copied to the drum 15 by an image forming optical system 8.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a copying machine, and more particularly, the present invention relates to a copying machine, and more particularly, the present invention relates to a copying machine. There is a copying machine that has an additional information imprinting function that records additional information such as the number of pages, copy magnification, and number of pages on a recording medium in the same way as the original image, and copies the original image onto the same copy.

As this type of copying machine, for example,
As shown in Publication No. 5, a liquid crystal display is provided on the document platen glass, a document is stacked on top of it, and the liquid crystal display and the document are simultaneously exposed to light so that the information displayed on the liquid crystal display is imprinted. There was something I did. However, in this method, due to the surface characteristics of the liquid crystal display, most of the light emitted from the exposure lamp and irradiating the liquid crystal display is specularly reflected in the direction of the arrow (m), as shown in Figure 9. As a result, the amount of light reaching the photoreceptor decreases, causing problems such as increased fogging in the area where the liquid crystal display is placed on the copy. Also,
There was also the disadvantage that the liquid crystal display was located close to the exposure lamp, which accelerated the deterioration of the liquid crystal.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a copying machine equipped with an additional information imprinting function that does not cause fogging on the area where the liquid crystal display is placed on the copy and suppresses deterioration of the liquid crystal display. purpose.

In order to solve the above problems, a transmissive liquid crystal display is provided on the top surface of the copying machine main body at a position where it can be projected onto the recording medium by the above-mentioned imaging optical system, and the liquid crystal display is placed on the top surface of the document platen glass. a light guiding means for guiding the light so as to irradiate the light from the exposure lamp; and a light guiding means for guiding the light so as to irradiate the light from the exposure lamp, and for forming an image of the light irradiated by the light guiding means and transmitted through the liquid crystal display on the recording medium by the above-mentioned imaging optical system. It is characterized by the following.

The exposure lamp is used to illuminate the transmissive liquid crystal display mounted on the top of the copier body from the top side using a separately provided light guiding means, and the light that has passed through the non-image area of the liquid crystal display is sent to the imaging optics. The system forms an image onto the recording medium and imprints additional information.

Embodiment FIG. 2 is a perspective view of the upper part of a copying machine (1) equipped with an additional information imprinting device (3) according to the present invention. At the top of the main body of the copying machine (1), there is a document table glass (2).
An additional information imprinting device (3) for imprinting additional information is provided on the side thereof. In addition, the front part of the copying machine (1) is provided with an operation section (4), and this operation section (4) also includes a print start key (4a) that can be operated to set the information to be imprinted and the number of copies. numeric keypad (4
b) A display device (4C) for displaying the number of copies, etc., a paper selection switch (4d) for selecting paper size, etc. are provided.

FIG. 1 is a sectional view showing the imaging optical system (8) at the bottom of the document table glass (2) and the optical system (18) of the additional information imprinting device (3). The imaging optical system (8) includes four reflecting mirrors (9), (10), (11>, (12)), and a projection lens (
13) and an exposure lamp (14), and the exposure lamp (14) is integrated with the reflector (9) in the direction of the arrow (
Move in the a) direction while irradiating the document surface. In addition, the optical system (18) of the additional information imprinting device (3) installed on the side of the document table glass (2) is covered by a cover (6), and the four sheets as shown in Fig. 3 are covered. Reflector (19)
, (20), (21), and (22). With the above configuration, in the initial stage of exposure, the exposure lamp (14) illuminates the lighting window (7), which will be described later, and the light taken in from here is transmitted to the reflecting mirrors (19) and (20) of the optical system (18). , (21), and (22) and irradiates the liquid crystal display (5) from vertically above, and additional information is imprinted onto the photoreceptor drum (15) by the scanning optical system (8). After that, the original (
24) is scanned in the direction of arrow fa1 by the exposure lamp (21), and the image of the document is imprinted onto the photosensitive drum (15) by the imaging optical system (8).

FIG. 4 is a diagram showing the arrangement of the above-mentioned lighting window (7) and liquid crystal display (5) in the cover (6) of the additional information imprinting device (3). Inside the cover (6), there is a transmissive liquid crystal display (5) that displays information to be imprinted, and a light window (7) that has the same shape as the liquid crystal display (5) in the main body of the copier (1). is provided.

In the above configuration, the exposure lamp (14) illuminates the lighting window (7) at the exposure start position. At this time, the lighting window (7
) The light incident from the optical system (18) illuminates the liquid crystal display (5) displaying additional information from vertically above, passes through the non-image area of the liquid crystal display (5), and passes through the reflecting mirror ( 9)
reach. After that, reflectors (10), (11), (1
2) and the photosensitive drum (15) via the projection lens (13).
) is imprinted with the information displayed on the liquid crystal display (5). Next, the exposure lamp 0 scans the document surface in the direction of the arrow (a) integrally with the reflecting mirror (9), thereby imprinting the document image onto the photoreceptor drum (15).

Note that it is desirable that the lower surface of the cover (6) other than the lighting window (7) be masked with a photosensitive color such as white so as not to create a shadow on the photoreceptor drum (15).

FIG. 5 and FIG. 6 are diagrams of another embodiment according to the present invention. A transmissive liquid crystal display (105) is provided at one end of the document table glass (102) in the sub-scanning direction, and a transmissive liquid crystal display (105) is provided on the side of the display to capture the light from the exposure lamp (+14). A lighting window (+07) is provided along the document table glass (102). This lighting window (107) and the liquid crystal display (10
A cover (106) is provided to cover 5),
Inside this cover (106), two reflective mirrors (120),
(121) is included. Furthermore, the main body of the multi-shooter (1
01) At the bottom of the internal lighting window (107) is a reflective mirror (l1
9) is provided, and these three reflecting mirrors (119)
, (120), and (121) constitute an optical system (118) of the additional information imprinting device (103).

Further, the exposure lamp (114) is configured to move integrally with the reflecting mirror (109) of the scanning optical system in the direction of the arrow (b) as in the embodiment shown in FIG. It is rotatably held so that its irradiation direction can be changed.

In the above configuration, in the initial stage of exposure, as shown in FIG.
0) and (121) and passes through the non-image area of the liquid crystal display (105) displaying additional information, and an image of the additional information is formed on the photoreceptor drum by an imaging optical system (not shown).

Figure 7 shows the reflecting mirrors (19) and (20) of the embodiment shown in Figure 1.
.

FIG. 3 is a diagram of another embodiment in which a bundle of optical fibers (218) is used in place of the optical system (18) in (21) and (22). Light taken in from the daylight window (207) passes through the fiber bundle (218) and enters the liquid crystal display (205) from vertically above. In this case, as shown in FIG. 8, the incident position and irradiation position of the light to each fiber (218a) must be at the same position in the sub-scanning direction (arrow (b) direction).

Furthermore, by using a bundle of optical fibers in this way, even when adopting the optical path as in the embodiment shown in FIG. 120), (
It is possible to irradiate the liquid crystal display (105) with light from the exposure lamp (114) from vertically above without using the exposure lamp (121).

By using the above-mentioned structure, it is possible to prevent development fog from occurring on the LCD display part of the copy, and to prevent the LCD display from being directly irradiated with light at the start of exposure. It is now possible to install a light-shielding plate between the lamps, which prevents deterioration of the liquid crystal display.Additionally, the additional information is imprinted on the photoreceptor drum via the imaging optical system in the same way as on the document surface, so it is possible to The information image is clear.

Effects of the Invention As is clear from the above explanation, since the light from the exposure lamp is irradiated from the back of the transmissive liquid crystal display using a separately provided optical system, there is no development fog on the liquid crystal display part of the copy. Additional information can be imprinted without causing any problems.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the imaging optical system and scanning optical system of the first embodiment, FIG. 2 is a perspective view of the upper part of the copying machine, and FIG.
The figure is a perspective view of the optical system of the additional information imprinting device, FIG. 4 is a diagram showing the positional relationship between the lighting window and the liquid crystal display, and FIGS. 5 and 6 are diagrams showing the second embodiment. FIGS. 7 and 8 are diagrams showing the light guiding means of the third embodiment, and FIG. 9 is a diagram showing a conventional additional information imprinting device. (2), (102)...Original table glass, (3), (1
03)...Additional information imprinting device, (5), (1
05), (205)...transmissive liquid crystal display, (7)
, (107), (207)...lighting window, (8)...
Imaging optical system, (15)...photosensitive drum, (18),
(118)...Optical system, (218)...Bundle of optical fibers. Source: Minolta Camera Co., Ltd. Figure 6 Figure 7 2θ7 '$8 @ /b Figure q

Claims (1)

[Scope of Claims] A copying machine in which a document placed on a document table glass is irradiated with an exposure lamp from the lower surface of the document table glass, and an image of the document is formed on a recording medium via an imaging optical system. a transmissive liquid crystal display provided on the top surface of the copying machine body at a position where it can be projected onto a recording medium by the imaging optical system;
a light guiding means for guiding light so that the liquid crystal display is irradiated with light from an exposure lamp from the upper surface side of the document glass; A copying machine equipped with an additional information imprinting function, characterized in that an image is formed on a recording medium by a system.