JPH06209399A - Picture reader - Google Patents

Abstract

PURPOSE:To improve productivity and to make a reader small and light in weight by arranging plural partial read means successively in a main scanning direction and supporting an image forming optical system freely movably in the main scanning direction. CONSTITUTION:In a picture reader 6, a fluorescent lamp 13 from the lower part on contact glass 10 and a reflection mirror 14 slender in the main scanning direction with 45 deg. of an inclined angle are arranged to face each other and one lens unit 15 which is the image forming optical system and two CCD sensors 16 are successively arranged on the reflected light path of the reflection mirror 14. Then, by connecting the lens unit 15 to a screw shaft 18 arranged parallelly to the main scanning direction directly connected to a driving motor 17, the lens unit 15 is supported freely movably in the main scanning direction and appropriately faces the two CCD sensors 16 provided successively in the main scanning direction. That is, two dividing lines 22 are image-formed on the two CCD sensors 16 by one lens unit 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reading apparatus used in image scanners, digital copying machines and the like.

[0002]

2. Description of the Related Art Conventionally, in an image reading apparatus used for an image scanner or the like, an image forming optical system and a reading means such as a line sensor are sequentially arranged at a position opposed to a document supporting base which moves in the sub-scanning direction. The main scanning line of the read image relatively moving in the sub-scan is formed by the image forming optical system and sequentially read by the reading means such as a CCD (Charge Coupled Device) sensor.

However, in this case, it is necessary to increase the number of elements of the reading means in order to improve the resolution of the image reading apparatus, and therefore it is impossible to achieve both reading performance and productivity. Therefore, an image reading apparatus proposed by the applicant of the present invention in Japanese Patent Laid-Open No. 4-59671 as an image reading apparatus for solving such a problem is to set a division line obtained by dividing a main scanning line of a read image into a plurality of divided lines. These division lines are individually read by a plurality of partial reading means arranged in series in the main scanning direction.

A conventional example of such an image reading apparatus will be described with reference to FIG. First, in the image reading device 1, a main scanning line 2 of the read image is divided into two, and a division line 3 is set, and two image forming optical systems 4 and 2 are formed at positions sequentially opposed to the division line 3. Partial reading means 5
It has a structure where and are arranged.

In the image reading apparatus 1 having such a configuration, the two division lines 3 obtained by dividing the main scanning line 2 are individually imaged by the two imaging optical systems 4 and then two partial readings are performed. Since the means 5 individually reads, the partial reading means 5
It is possible to read the main scanning line 2 with a resolution twice as many as the number of elements.

[0006]

In the image reading apparatus 1 described above, the main scanning line 2 is divided into two division lines 3.
Are imaged individually by the two imaging optical systems 4 and then individually read by the two partial reading means 5.

However, in the above-mentioned image reading apparatus 1, since it is necessary to use two parts such as the imaging optical system 4 and the partial reading means 5 which are precision parts having extremely low productivity, it is necessary to improve the productivity. It is difficult to achieve, and the reduction in size and weight is hindered.

[0008]

The invention according to claim 1 is
In an image reading apparatus that sequentially reads main scanning lines of a read image that moves relatively in the sub-scan direction, a plurality of divided lines that are obtained by dividing the main scanning line of the read image are set, and a plurality of divided lines that individually read these divided lines are set. The partial reading means are arranged in series in the main scanning direction, and one image forming optical system for appropriately forming an image of the division line of the read image is movably supported on these partial reading means.

According to a second aspect of the present invention, in an image reading apparatus for sequentially reading the main scanning lines of the read image that moves in the sub-scanning direction, the main scanning lines of the read image are divided into a plurality of division lines, One image forming optical system for appropriately forming an image of these division lines and one partial reading means for individually reading are integrated and supported movably in the main scanning direction.

According to a third aspect of the present invention, in an image reading apparatus for sequentially reading the main scanning lines of the read image that moves in the sub-scanning direction, the main scanning line of the read image is divided into a plurality of division lines, A plurality of image-forming optical systems that individually form an image of these division lines are connected in the main scanning direction, and each of the plurality of divided lines that forms an image by these image-forming optical systems is individually read. The means is supported so as to be movable in the main scanning direction.

According to a fourth aspect of the present invention, in an image reading apparatus for sequentially reading the main scanning lines of the read image that moves in the sub-scanning direction, the main scanning line of the read image is divided into a plurality of division lines, One image forming optical system for forming an image of the main scanning line composed of these division lines is fixedly arranged, and the plurality of division lines in the main scanning line for forming an image by the image forming optical system are individually arranged. One partial reading means for reading is supported movably in the main scanning direction.

[0012]

According to the first aspect of the present invention, the divided line obtained by dividing the main scanning line of the read image into a plurality of lines is appropriately imaged by a single image forming optical system which is movably supported in the main scanning direction. Are individually read by a plurality of partial reading means arranged in series.

According to the second aspect of the present invention, one image forming optical system and one partial reading means that integrally support the divided lines obtained by dividing the main scanning line of the read image in the main scanning direction are provided. And form an image as appropriate and read them individually.

According to a third aspect of the present invention, the main scanning line of the read image is divided into a plurality of division lines, and the divided lines are individually formed by a plurality of imaging optical systems arranged in the main scanning direction. The individual partial reading means is movably supported on the individual reading means.

According to a fourth aspect of the present invention, the main scanning line of the read image is imaged by a single imaging optical system fixedly arranged.
A plurality of division lines in the main scanning line imaged by this imaging optical system are individually read by one partial reading unit that is movably supported in the main scanning direction.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. First, the image reading device 6 is formed as a part of the facsimile device 7, as illustrated in FIG. 2, and the facsimile device 7 has the image reading device 6 built in at the top and the image printing device 8 at the bottom. It has a built-in structure. Further, in this facsimile device 7, a part of the upper surface of the flat box-shaped main body housing 9 is a contact glass 10 having transparency,
A document feeding mechanism 12 is formed on the upper surface of the main body housing 9 communicating with the contact glass 10 by a plurality of feed rollers 11.

Therefore, in this image reading device 6, as illustrated in FIG. 3 and FIG. 3, a fluorescent lamp 13 and a slender reflecting mirror 14 in the main scanning direction with an inclination angle of 45 degrees are opposed to the contact glass 10 from below. One lens unit 1 which is arranged and is an imaging optical system on the reflection optical path of the reflection mirror 14.
5 and two CCD sensors 16 which are partial reading means are sequentially arranged. In the image reading device 6, as shown in FIG. 1, the lens unit 15 is connected to the screw shaft 18 which is directly connected to the drive motor 17 and arranged in parallel with the main scanning direction, so that the lens unit 15 is connected. The unit 15 is movably supported in the main scanning direction and appropriately opposes the two CCD sensors 16 connected in the main scanning direction.

With this arrangement, in the image reading device 6, as shown in FIGS. 1 and 3, the main scanning line 21 of the read image 20 of the original 19 is divided into two division lines 22. ing. Therefore, in the image reading device 6, the read image 20 of the document 19 sequentially transported in the sub-scanning direction by the document transport mechanism 12 is illuminated by the fluorescent lamp 13.
The left and right divided lines 22 of the main scanning line 21 of the illuminated read image 20 are appropriately imaged by the lens unit 15 which slides in the main scanning direction to form two CCD sensors 1.
It is designed to be read individually at 6.

By doing so, in the image reading device 6, the two divided lines 22 obtained by dividing the main scanning line 21 are imaged by the lens unit 15 and then two CCDs are formed.
Since each sensor 16 reads it, this CCD sensor 16
It is possible to read the main scanning line 21 with a resolution twice as many as the number of elements. Moreover, in the image reading device 6, as described above, the two division lines 22 are connected to the two CCD sensors 16
Since it is possible to form an image with one lens unit 15 in the above, it is not necessary to use two lens units 15 and the like which are precision parts with extremely low productivity, which contributes to improvement in productivity and reduction in size and weight. can do.

Next, an embodiment of the invention described in claim 2 will be described with reference to FIG. The same parts as those of the image reading device 6 described above as an embodiment of the invention described in claim 1 are denoted by the same names and reference numerals, and description thereof will be omitted. First, in the image reading device 23, one lens unit 15 which is an image forming optical system and one CC which is a partial reading means.
A reading unit 24 that is integrated with the D sensor 16 is movably supported in the main scanning direction.
4 is adapted to face the two dividing lines 22 as appropriate.

In such an arrangement, in the image reading device 23, the left and right division lines 22 of the main scanning line 21.
One reading unit 2 that slides in the main scanning direction
The image is appropriately formed by the lens unit 15 of 4 and the CCD sensor 1
It is designed to be read individually at 6.

By doing so, the image reading device 23 can read the main scanning line 21 with a resolution twice the number of elements of the CCD sensor 16 and, as described above, the two division lines 22. One CCD sensor 16
Since the lens unit 15 and the CCD sensor 16 which are the precision parts having extremely low productivity are not required to be two in number, the productivity is improved and the size and weight are reduced. Can contribute to.

Next, an embodiment of the invention described in claim 3 will be described with reference to FIG. The same parts as those of the image reading device 6 described above as one embodiment of the invention described in claim 1 are denoted by the same names and reference numerals, and description thereof will be omitted. First, in this image reading device 25, two division lines 22
Two lens units 15 which are image forming optical systems are fixedly disposed at positions facing each other, and two CCD sensors 16 which are partial reading means movably supported in the main scanning direction are provided. The lens unit 15 of FIG.

In the image reading device 25 having such a structure, the left and right division lines 22 of the main scanning line 21 are separated.
Is imaged by two lens units 15 and is appropriately read by one CCD sensor 16 that slides in the main scanning direction.

By doing so, the image reading device 25 can read the main scanning line 21 at a resolution twice the number of elements of the CCD sensor 16 and, as described above, the two division lines 22. One CCD sensor 16
The image is formed by two lens units 15 on the CCD sensor 1 which is a precision component with extremely low productivity.
Since it is not necessary to use two 6's, it is possible to contribute to improvement in productivity and reduction in size and weight.

Next, an embodiment of the invention described in claim 4 will be described with reference to FIG. The same parts as those of the image reading device 6 described above as one embodiment of the invention described in claim 1 are denoted by the same names and reference numerals, and description thereof will be omitted. First, in the image reading device 26, one large lens unit 27 as an imaging optical system is fixedly arranged at a position facing the main scanning line 21, and the main scanning in which the lens unit 27 forms an image. One CCD sensor 16 which is a partial reading means is movably supported in the main scanning direction so as to appropriately oppose the divided line 22 of the line 21.

With this arrangement, in the image reading device 26, the main scanning line 21 is collectively imaged by the single lens unit 27 and the division line 22 is formed by the single CCD sensor 16 which slides in the main scanning direction. It can be read as needed.

By doing so, the image reading device 26 can read the main scanning line 21 with a resolution twice the number of elements of the CCD sensor 16 and, as described above, the two dividing lines 22. One CCD sensor 16
An image is formed by one lens unit 27 on the CCD sensor 1 which is a precision component with extremely low productivity.
Since it is not necessary to use two lens units 6 and six lens units 27, it is possible to contribute to improved productivity and reduction in size and weight.

[0029]

According to the first aspect of the present invention, the main scanning line of the read image is divided into a plurality of division lines, and a plurality of partial reading means for individually reading these division lines are connected in the main scanning direction. By disposing one imaging optical system for appropriately forming the division lines of the read image on these partial reading means so as to be movable in the main scanning direction, a plurality of division lines can be divided into a plurality of partial reading means. It is possible to form an image with a single imaging optical system, and it is not necessary to have multiple imaging optical systems that are precision parts with extremely low productivity. It has the effect of being able to

According to a second aspect of the present invention, a main scanning line of the read image is divided into a plurality of divided lines, and one image forming optical system for appropriately forming these divided lines and one portion for individually reading the divided optical lines. Since the reading means is integrated and supported so as to be movable in the main scanning direction, a plurality of division lines can be imaged on one partial reading means by one imaging optical system, and the productivity is extremely low. Since it is not necessary to provide a plurality of the partial reading means and the imaging optical system, which are components, it is possible to contribute to improvement in productivity and reduction in size and weight.

According to the third aspect of the present invention, the main scanning line of the read image is divided into a plurality of division lines, and a plurality of imaging optical systems for individually forming these division lines are provided in the main scanning direction. A plurality of division lines are connected to each other by movably supporting one partial reading means for individually reading a plurality of division lines imaged by these imaging optical systems in the main scanning direction. Since it is possible to form an image on one partial reading means by the image optical system and it is not necessary to provide a plurality of partial reading means which are precision parts with extremely low productivity, it contributes to the improvement of productivity and reduction in size and weight. It has the effect of being able to do so.

According to a fourth aspect of the present invention, a main scanning line of the read image is divided into a plurality of division lines, and one imaging optical system for forming an image of the main scanning line composed of these division lines is fixed. , And the partial scanning means for individually reading a plurality of division lines in the main scanning line imaged by this imaging optical system is movably supported in the main scanning direction. Since it is not necessary to provide a plurality of partial reading means and image forming optical systems, which are precision parts with extremely low productivity, because it is possible to form an image on the partial reading means of No. 1 by one imaging optical system, the productivity can be improved. It has effects such as contribution to improvement and reduction in size and weight.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of an embodiment of an image reading apparatus according to the present invention.

FIG. 2 is a vertical cross-sectional side view showing a facsimile device including an image reading device as a part.

FIG. 3 is a schematic diagram illustrating a main part of the image reading apparatus.

FIG. 4 is a schematic diagram showing a main part of an embodiment of an image reading apparatus according to the present invention.

FIG. 5 is a schematic diagram showing a main part of an embodiment of an image reading apparatus according to the third aspect of the invention.

FIG. 6 is a schematic diagram showing a main part of an embodiment of an image reading apparatus according to the invention of claim 4;

FIG. 7 is a schematic diagram showing an optical structure of a conventional example of an image reading apparatus.

[Explanation of symbols]

 6, 23, 25, 26 Image reading device 15, 27 Imaging optical system 16 Partial reading means 20 Read image 21 Main scanning line 22 Dividing line

Claims (4)

[Claims] 1. An image reading apparatus for sequentially reading main scanning lines of a read image that moves relatively in the sub-scan direction, sets a division line obtained by dividing the main scanning line of the read image into a plurality of division lines, and divides these division lines individually. A plurality of partial reading means for reading in parallel with each other in the main scanning direction, and one imaging optical system for appropriately forming an image of the division line of the read image is supported movably in the main scanning direction on these partial reading means. An image reading device characterized by the above. 2. An image reading apparatus for sequentially reading main scanning lines of a read image that moves relatively in the sub-scan direction, sets division lines obtained by dividing the main scanning lines of the read image into a plurality of lines, and appropriately sets these division lines. An image reading apparatus characterized in that one image forming optical system for forming an image and one partial reading means for individually reading are integrally supported so as to be movable in the main scanning direction. 3. An image reading apparatus for sequentially reading main scanning lines of a read image that moves relatively in the sub-scan direction, sets a division line obtained by dividing the main scanning line of the read image into a plurality of lines, and sets these division lines individually. A plurality of image forming optical systems for forming an image on the main scanning direction are connected in series, and one partial reading unit for individually reading the plurality of division lines imaged by these image forming optical systems is provided in the main scanning direction. An image reading device, which is movably supported. 4. An image reading apparatus for sequentially reading main scanning lines of a read image that moves relatively in the sub-scan direction, sets a division line obtained by dividing the main scanning line of the read image into a plurality of division lines, and includes these division lines. One image reading optical system that forms an image of the main scanning line is fixedly arranged, and one partial reading unit that individually reads the plurality of division lines in the main scanning line formed by the image forming optical system. An image reading device characterized in that the image scanning device is supported so as to be movable in the main scanning direction.