JPH045987B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image recording/copying apparatus having an image input function and a copying function.

[Conventional technology]

(1) Conventionally, this type of image recording/copying apparatus, as shown in FIG. one of them is imaged on the photoreceptor drum 7, the other is read by the image reading element 8, and the signal is stored in a memory (not shown) or the like, or the semiconductor laser 9 and output the laser light from the semiconductor laser 9 to the polygon 10.
The photosensitive drum 7 was scanned through the fθ lens 11. In other words, latent image recording using the image input optical system and latent image recording using the copying optical system are separated by the splitter 6.
The document table, the photoreceptor drum, the developing system arranged around it, the paper, etc. were shared, and they were configured so that they could be switched and used as needed.

(2) In addition to the above conventional technology, an image input lens with a copying lens and an image reading element is provided between the photosensitive drum on the document surface, and the optical axis passing through both lenses is aligned in the main scanning direction. An image recording/copying device (Utility Model Application Publication No. 54-29044), which is offset from each other, and an image input lens consisting of a front group lens and a rear group lens are provided, and the front group lens of the image input lens is used for copying. There was also an image recording/copying device (Japanese Utility Model Application No. 86421/1983) in which an in-mirror was removably inserted between the front group lens and the rear group lens so that it could be used as a shared lens.

(3) Furthermore, as one of the means for switching between multiple lenses, a dark box is provided between the document surface and the photoreceptor drum, which has an entrance hole for the reflected light from the document surface on the front wall and a light exit slit at the rear. A moving board is provided in the dark box that rotates to cut the axis, and a plurality of lenses are provided on the same circle on the moving board (Japanese Patent Application Laid-Open No. 80125/1983).
had been devised.

[Problem to be solved by the invention]

However, in the case of the above-mentioned prior art 1, it is difficult to adjust the positions of the lens 5 and the image reading element 8 provided before and after the splitter 6 in the image input optical system, especially when switching between the image input optical system and the copying optical system. When in use, the image reading element and lens move separately, so their positional relationship can easily become distorted.
There was a problem that position adjustment became even more difficult.

In addition, among the above-mentioned prior art 2,
In the case of No. 29044, when the optical system for copying is not used,
The photoreceptor drum is exposed to the extra light reflected from the document surface by multiple mirrors, which accelerates the deterioration of the photoreceptor drum.
It is necessary to provide a shielding plate to block the light flux to the photoreceptor during image reading, resulting in problems such as mechanical complexity.

Furthermore, in the case of Prior Art 3, when switching lenses, the "length" of the movable substrate itself in the moving direction and the "length" from the rotation center of the movable substrate to the cut point of the light incident axis are required, and the dark box is There was a problem when it became bulky in both directions. For this reason, this technique could not be applied to image recording and copying devices.

[Means to solve the problem]

This invention is intended to solve the above-mentioned problem, and includes a front wall between the document surface and the photoreceptor drum, a front wall that prevents light reflected from the document surface from entering. A dark box having a light hole and a light output slit at the rear thereof through which the light beam passes during copying is provided, and a movable board that moves back and forth in a straight line in a three-dimensional intersection with respect to the light entrance axis is provided in the dark box. A copying lens is provided at a position that coincides with the light entrance axis at the movement stop point, and an image input lens with an image reading element is provided at a position that coincides with the light entrance axis at the backward movement stop point.

〔Example〕

Next, the present invention will be explained based on an embodiment shown in FIG. 2 and subsequent figures.

20 is the main body, 21 is the document table, 22 is the document table 21
This is a light beam that irradiates the upper document surface 23. light source 22
The reflected light from the document surface 23 illuminated by
The light enters the copying lens 27 through the second mirror 25 and the third mirror 26, which are fixed at zero, and then enters the fourth mirror 28.
The image is then formed on the photoreceptor drum 29.

31 has a light entrance hole 30 for the reflected light from the document surface 23 on the front wall provided between the document surface 23 and the photosensitive drum 29, and a light exit slit 47 for passing the light beam at the rear thereof during copying. It's a dark box. Inside the dark box 31, a movable substrate 32 is provided that moves back and forth in a straight line in a three-dimensional intersection with respect to the light incident axis.
As shown in FIGS. 3A and 4A, the moving substrate 3
The copying lens 27 is located at a position where the forward movement stop point on the moving base plate 32 coincides with the light incident axis, and as shown in FIGS. At the position corresponding to the wall plate 34 installed immediately behind
An image input lens 33 to which an image reading element 35 is attached is provided.

The movable board 32 is slidably mounted on a rail 36 laid at the bottom of the dark box 31, and is supported by an endless member 38 extended between two shafts 37, 37', so that the drive motor 39 can be rotated in the forward or reverse direction. By rotation, it is reciprocated in a direction substantially perpendicular to the light incident axis via a worm 40 and a worm gear 41.

In the figure, 42 is an operating switch for the image reading element 35, and 43 is an operating switch for the copying optical system.

FIG. 3B shows a case where the image input lens 33 is facing the light entrance hole 30 of the dark box 31, and the image input lens 33 is facing the original surface 23.
The reflected light enters the image input lens 33, and the extra diffusely reflected light enters the dark box 3.
1 so that it does not reach the photosensitive drum 29 of the copying optical system. The light beam entering the image input lens 33 is read by an image reading element 35 placed immediately behind it, and the signal is stored in a memory (not shown) or the like, or is stored in a semiconductor as shown in FIG. The laser light emitted from the semiconductor laser 44 passes through a polygon 45 and an fθ lens 46 and is scanned onto the photosensitive drum 29.

47 is a light output slit provided at the rear bottom of the dark box 31 so as to face the mirror surface of the fourth mirror 28;
The light beam passing through the copying lens 27 is reflected by the fourth mirror 28 and reaches the photosensitive drum 29 through the light output slit 47.

Incidentally, a latent image recording section for phenomenon, transfer, etc. is arranged around the photosensitive drum 29, so that image recording is performed.

4A and 4B are explanatory diagrams showing the operation of the present invention, and FIG. 4A shows a case where reflected light from the document surface 23 passes through the copying lens 27 and forms an image on the surface of the photosensitive drum 29. . In this case, the image input lens 33 and the image reading element 35 are located outside the light entrance hole 30 on the front wall of the dark box 31 and do not function at all. In the figure B, the moving board 32 is moved in the orthogonal direction with the light entrance axis, and the image input lens 33 is aligned with the light entrance hole 30 of the dark box 31, so that the reflected light from the document surface 23 is reflected from the image input lens 33. This is the case when light is entering the area.

〔Effect of the invention〕

As described above, the present invention provides an entry hole for light reflected from the document surface in the front wall between the photoconductor drum on the document surface, and an entrance hole for the reflected light from the document surface in the front wall during copying. A dark box each having a light output slit through which the light beam passes is provided, and a movable board that moves back and forth in a straight line in a three-dimensional intersection with respect to the light entrance axis is provided in the dark box, and a forward movement stop point on the moving board is connected to the light entrance axis. The feature is that a copying lens is provided at the matching position, and an image input lens with an image reading element is provided at a position that matches the light input axis at the double-movement stop point, so that the reflected light from the document surface can be copied. Forming an image on a photoreceptor drum through a lens for image input, processing the signal with an image reading element through an image input lens and storing it in memory, or outputting it to a semiconductor laser and scanning it on the photoreceptor drum through a polygon or fθ lens. can be done selectively and easily. Furthermore, the image input lens is provided separately from the copying lens, and the position of the image reading element is adjusted in advance with respect to the image input lens, and this positional relationship is determined between the copying optical system and the image input optical system. It does not go awry even when switching. Furthermore, when the copying optical system is not used, that is,
When the image input lens faces the light entrance hole provided on the front wall of the dark box, the copying lens is covered by the blind part of the front wall of the dark box, so the photoreceptor drum is located several times from the original surface. This has various excellent effects such as being able to prevent exposure to extra reflected light that has been diffusely reflected through the mirrors. Moreover, since the moving substrate reciprocates in a straight line in a three-dimensional intersecting manner with respect to the light entrance axis, the dark box that houses it does not become bulky, so that the entire device can be miniaturized, which is a unique effect of the present application.

[Brief explanation of drawings]

FIG. 1 is a schematic side view showing a conventional example, FIG. 2 is a schematic side view showing an embodiment of the present invention, FIGS. 3A and 3B are enlarged perspective views of the main parts, and FIG. Figures A and B are explanatory diagrams showing the operating state. 23... Original surface, 27... Copying lens, 29
... Photosensitive drum, 30 ... Light entrance hole, 31 ... Dark box, 32 ... Moving board, 33 ... Image input lens, 35 ... Image reading element, 47 ... Light output slit.

Claims (1)

[Claims] 1. A dark box is provided between the document surface and the photoreceptor drum, and the front wall has an entrance hole for the reflected light from the document surface, and the rear wall has a light exit slit for passing light during copying. A moving board is provided that moves back and forth in a straight line in a three-dimensionally intersecting manner with respect to the optical axis, and a copying lens is placed at a position on the moving board that coincides with the light incident axis at a forward stop point on the moving board, and coincident with the light incident axis at a backward stop point. An image recording/copying apparatus characterized in that an image input lens is provided with an image reading element attached at a coincident position.