JPH0738709A - Original reader - Google Patents

Abstract

PURPOSE:To provide the original reader which can switch between the still original reading and moving original reading without moving an optical unit and can moniaturize the entire device. CONSTITUTION:This device is provided with a first optical unit 10 equipped with a lamp 4 for irradiating a still original face 5 with light and a mirror 1 for reflecting out the information of the original face 5 and a second optical unit 11 for feeding the output information from this first optical unit 10 into a CCD sensor 8. The second optical unit 11 is equipped with a repeating reflection mirror 2, repeating output mirror 3 for feeding reflected light from the repeating reflection mirror 2 into the CCD sensor 8, and incidental light optical path switching mechanism for variably setting an optical path 6 for light incidence relative to the reflecting plane of this repeating output mirror 3. Orthogonally to this new incident light optical path 16 to be variably set, an original face 14 of the moving original is set at the light emitting plane side part of the incident light optical path 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document reading device, and more particularly, to a document reading device suitable for both facsimiles and copying machines for both stationary and moving documents.

[0002]

2. Description of the Related Art As shown in FIG. 3, a conventional still original reading apparatus outputs information of a still original irradiation lamp 54 for irradiating an original surface 55 of a stationary original and information of the original surface 55 irradiated by the still original irradiation lamp 54. And a reflecting mirror 51 for reflecting and outputting,
In addition, the first equipped to be able to reciprocate along the document surface 55
The optical unit 60 of FIG. In addition, the output information from the first optical unit 60, which is moved in response to the movement of the first optical unit 60, is transferred to the CC via the lens 57.
And a second optical unit 61 which is fed to the D sensor 58.

This second optical unit 61 receives the output information from the first optical unit 60 and relays it to reflect it, and relays the reflected light from the relay reflective mirror 52 to the CCD sensor. And an output mirror 53. Reference numeral 56 indicates an optical path obtained by folding the reflected light obtained by irradiating the original surface 55 with the stationary original irradiation lamp 54 by the reflection mirror 51, the relay reflection mirror 52, and the relay output mirror 53.

Then, it is read by the CCD 58 through the lens 57. At this time, the force transmitted by the drive shaft 59 causes the first and second optical units 60 and 61 to move back and forth to the positions of the units 62 and 63 for reading the original.

Further, since the reading of the stationary original and the reading of the moving original are performed by the same optical system, the original surface of the moving original must be flush with the original surface 55 of the still original. Above, it is arranged at a position moved to the left or right of the document surface 55 of the stationary document in FIG.

[0006]

In the above-mentioned conventional optical system for reading an original, the first optical system and the second optical system which constitute the optical system in order to use the stationary original reading mechanism and the moving original reading mechanism in the same optical system. The optical units 60 and 61 must be moved from the original reading range of the stationary original reading to the moving original reading position, and the area occupied by the optical system is increased by the moving distance. Becomes
There is a disadvantage that the entire device becomes large.

[0007]

It is an object of the present invention to improve the disadvantages of the conventional example, and in particular, it is possible to easily switch between stationary document reading and moving document reading without moving the entire first and second optical units. At the same time, it is an object of the present invention to provide a document reading apparatus which is downsized in its entirety.

[0008]

SUMMARY OF THE INVENTION According to the present invention, a stationary document irradiating lamp for irradiating a stationary document and a mirror for reflecting and outputting information on the surface of the stationary document irradiated by the stationary document irradiation lamp are provided. First equipped to be able to move back and forth along
Optical unit and a second optical unit that moves corresponding to the movement of the first optical unit and sends the output information from the first optical unit to the CCD sensor.

The second optical unit includes a relay reflection mirror that receives and reflects the output information from the first optical unit,
The relay output mirror is configured to send the reflected light from the relay reflection mirror to the CCD sensor, and the light incident light path switching mechanism that variably sets the light incident light path of the reflection surface of the relay output mirror.

Then, the original surface of the moving original is set at the light emitting surface side portion of the light incident optical path, which is orthogonal to the new light incident optical path variably set by the light incident optical path switching mechanism. Is taking. This aims to achieve the above-mentioned object.

[0011]

[Operation] Reflected light on the original surface 5 obtained by irradiation with the stationary original irradiation lamp 4 is reflected by the reflection output mirror 1, the relay reflection mirror 2, and the relay output mirror 3 to set the optical path 6. The reflected light output through this optical path 6 is read by the CCD 8. At this time, the force transmitted by the drive shaft 9 causes the first and second optical units 10 and 11 to move the positions of the units 12 and 13 in FIG. Move back and forth.

On the other hand, in order to read the moving original as well, as described above, the optical path 16 is provided by folding the light emitted from the moving original irradiation lamp 15 onto the original surface 14 of the moving original by the relay output mirror 3. , Scan in the same way as when scanning a static document. In this case, the optical path is selected and switched by moving the relay output mirror 3 during the reading of the stationary document and the reading of the moving document. This selective switching of the optical path is performed by the light incident optical path switching mechanism.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the embodiment shown in FIGS. 1 and 2, a stationary document irradiation lamp 4 for irradiating a document surface 5 of a stationary document and a document surface 5 of a stationary document irradiated by the stationary document irradiation lamp 4 are used.
And a reflection output mirror 1 for reflecting and outputting the information of 1., and a first optical unit 10 provided so as to be capable of reciprocating along a stationary document. In addition, the first optical unit 1 moves in response to the movement of the first optical unit 10.
A second optical unit 11 for sending output information from 0 to the CCD sensor 8 is provided.

The second optical unit 11 receives and reflects the output information from the first optical unit 10 and a relay reflection mirror 2 and a relay output mirror which sends the reflected light from the relay reflection mirror 2 to the CCD sensor 8. 3 and a light incident optical path switching mechanism 11A that variably sets the light incident optical path 6 on the reflecting surface of the relay output mirror 3.

A document surface 14 of a moving document is set at a light emitting surface side portion of the light incident light path 16 orthogonal to a new light incident light path 16 which is variably set by the light incident light path switching mechanism 11A. Reference numeral 15 denotes a moving original irradiation lamp that irradiates the original surface 14 of the moving original.

The light incident light path switching mechanism 11A rotates a cam portion 9 which variably sets the light incident light path of the reflection surface of the relay output mirror 3 described above and the cam portion 9 through a one-way clutch 9B within a predetermined range. A drive shaft 9A to be driven and a tension spring 1 for pulling the cam portion 9 into a fixed position when the drive shaft 9A is rotated in the reverse direction.
It has a configuration including 9 and.

This will be described in more detail. The reflected light of the document surface 5 obtained by irradiation with the stationary document irradiation lamp 4 is returned by the reflection output mirror 1, the relay reflection mirror 2, and the relay output mirror 3 to set the optical path 6. The reflected light output through this optical path 6 is read by the CCD 8 through the lens 7. At this time, the force transmitted by the drive shaft 9 causes the first and second optical units 1 to pass through a conveying unit (not shown).
0 and 11 are units 1 in FIG. 1 for reading a document.
2. It moves back and forth to the position of the unit 13.

On the other hand, since the reading is also performed by the moving original feeding mechanism, as described above, the original surface 1 of the moving original is used.
The light radiated by the moving original irradiation lamp 15 is returned to the mirror 4 by the mirror 3 to provide an optical path 16, and the light is read in the same manner as when reading the still original. In this case, the optical path is selected and divided by moving the relay output mirror 3 at the time of reading the still document and at the time of reading the automatic document.

A method of switching the relay output mirror 3 will be described with reference to FIG. The cam portion 9 to which power is transmitted from the drive shaft 9A through the one-way clutch 9B is separated from the mirror holder 18 by removing the watermelon at the same time when the driving is started, and the relay output mirror 3 and the mirror holder 18 are rotated by the tension spring 19. While forming the optical path 6 for reading the static original,
The second optical unit 11 is sent. During this feeding, the cam portion 9 rotates in synchronization with the drive shaft 9A.

Due to the reciprocating motion of the second optical unit 11, the drive shaft 9A is converted into the reverse motion. In this case, the cam portion 9 reversely hooks the watermelon on the mirror holder 18 of the second optical unit 11 that has returned, and the tension spring 1
Against the force of 9, the relay output mirror 3 and the mirror holder 18
Is rotated in the direction of arrow A to form the optical path 16 for automatic document feeding and reading. Cam part 9 is completely mirror holder 1
When connected to 8, the one-way clutch 9B idles between itself and the drive shaft 9A, so that the relay output mirror 3 is accurately set at a fixed position.

[0021]

Since the present invention is constructed and functions as described above, according to the present invention, the optical paths of the stationary original reading system and the moving original reading system are automatically switched by switching the relay output mirror without moving the entire optical system. It is possible to switch to this mode, and this switching operation can be performed quickly and easily by the light incident optical path switching mechanism, and as described above, the space of the optical system for reading the moving original is not particularly required. It is possible to provide an original document reading apparatus which is not conventional and can be downsized.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an optical system according to an embodiment of the present invention.

FIG. 2 is a configuration diagram showing an example of a light incident optical path switching mechanism in FIG.

FIG. 3 is a configuration diagram of an optical system showing a conventional example.

[Explanation of symbols]

 1 Reflection Output Mirror 2 Relay Reflection Mirror 3 Relay Output Mirror 4 Still Original Document Irradiation Lamp 5 Original Document Surface 6 Light Incident Optical Path 8 CCD Sensor 9 Cam 9A Drive Axis 9B One-way Clutch 10 First Optical Unit 11 Second Optical unit 11A Light incident light path switching mechanism 12 Moving end of first optical unit 13 Moving end of second optical unit 14 Original document surface of moving document 15 Moving original irradiation lamp lamp 16 Light incident optical path 18 Mirror holder 19 Tension spring

Claims (2)

[Claims] 1. A stationary manuscript irradiation lamp for irradiating a stationary manuscript, and a mirror for reflecting and outputting information on the surface of the stationary manuscript irradiated by the stationary manuscript irradiation lamp, which is reciprocally movable along the stationary manuscript. Document reading apparatus including a first optical unit that has been read and a second optical unit that moves in response to the movement of the first optical unit and sends output information from the first optical unit to a CCD sensor In the second optical unit, a relay reflection mirror that receives and reflects the output information from the first optical unit, a relay output mirror that sends the reflected light from the relay reflection mirror to a CCD sensor, and the relay A light incident light path switching mechanism that variably sets the light incident light path with respect to the reflecting surface of the output mirror, and is variably set by this light incident light path switching mechanism. At a light emitting surface side portion of the light incident light path orthogonal to the new light incident light path,
An original reading device characterized in that the original surface of a moving original is set. 2. A cam unit for variably setting a light incident light path of a reflection surface of the relay output mirror, and a drive for rotationally driving the cam unit within a predetermined range via a one-way clutch, wherein the light incident light path switching mechanism is variably set. 2. The document reading apparatus according to claim 1, further comprising a shaft and a tension spring that pulls the cam portion into a fixed position when the drive shaft rotates in the reverse direction.