JPH06233071A - Image reader - Google Patents

Abstract

PURPOSE:To provide the image reader which is small-sized and has the number of constituting parts reduced. CONSTITUTION:This device consists of a read glass plate 14 of a document 11, an LED 16 which illuminates the document surface, a first reflection face 13a which makes the light from the document surface transmitted through the read glass plate 14 incident on a rod lens array 15, and a second reflection face 13b which reflects the light emitted from the rod lens array 15 toward a photoelectric transducer substrate 17 arranged in a position close to the read glass plate 14, and the first reflection face 13a, the second reflection face 13b, and a main body housing 13 are integrated into one body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reading device.

[0002]

2. Description of the Related Art In recent years, various methods have been proposed for reducing the size of an image reading apparatus used for a facsimile or the like as an image reading apparatus unit as the size of the entire facsimile apparatus decreases.

FIG. 4 shows a schematic structure of a conventional image reading apparatus, which is an image reading apparatus in which a rod lens array of a contact image sensor unit is arranged so that its optical axis is parallel to the original conveying direction. is there.

In the figure, 1 is a document, 2 is a platen roller for pressing and conveying the document 1, 3 is a main body housing, 4 is a reading glass plate, 5 is a first reflecting surface, 6 is a second reflecting surface, 7
Is a rod lens array in which the optical axis is arranged parallel to the document surface,
8 is an LED for illuminating the original surface, 9 is a photoelectric conversion element substrate,
Reference numeral 10 is a light shielding member for cutting off the light directly entering the photoelectric conversion element substrate 9 from the LED 8 without passing through the regular optical path.

Next, the operation of this conventional image reading apparatus will be described. The original 1 set by the user of the apparatus is pressed and conveyed on the reading line by the platen roller 2.
The image on the original 1 on the reading line is illuminated by the LED 8 on the reading glass plate 4, and the optical path of the first reflecting surface 5, the rod lens array 7, and the second reflecting surface 6 is taken, and the photoelectric conversion element substrate 9 is magnified. The image is formed as an erect image and the image is read. At this time, the light directly entering from the LED 8 is cut by the light shielding member 10.

[0006]

As described above, the conventional image reading apparatus has a problem that the apparatus can be downsized but the number of constituent parts is increased.

SUMMARY OF THE INVENTION The present invention solves the above problems, and an object of the present invention is to provide an image reading apparatus capable of reducing the number of components while reducing the size of the apparatus.

[0008]

In order to achieve the above object, the present invention arranges a photoelectric conversion element substrate in the vicinity of a reading glass plate, and a second reflecting surface reflects light toward the reading glass plate, Moreover, the first reflecting surface, the second reflecting surface, and the main body housing are integrally formed.

[0009]

According to the present invention, the document surface is illuminated by the LED, and the light on the document surface is reflected in the direction of the reading glass plate through the reading glass plate, the first reflecting surface, the rod lens array and the second reflecting surface. The light is received by the photoelectric conversion element substrate arranged near the reading glass plate. Since the photoelectric conversion element substrate is provided in the vicinity of the reading glass plate, there is no need to provide a space for accommodating the photoelectric conversion element substrate below the main body housing, and no light shielding member is required. Further, since the first reflecting surface and the second reflecting surface are integrally formed on the main body housing, no special mirror member is required.
Therefore, the structure is simplified and the number of constituent parts can be reduced.

[0010]

Embodiments of the image reading apparatus according to the present invention shown in FIGS. 1, 2 and 3 will be described below with reference to the drawings.

(First Embodiment: See FIG. 1) FIG. 1 is a structural explanatory view of an image reading apparatus according to a first embodiment of the present invention. In the first embodiment shown in FIG. 1, 11 is a document, 12 is a platen roller for pressing and conveying the document 11 on a reading line, 13
Is a main body housing, 13a is a first reflecting surface provided on the main body housing 13 and located on the incident side of the rod lens array 15 and inclined by about 45 degrees with respect to the optical axis of the rod lens array 15, and 13b is provided on the main body housing 13. The second reflecting surface is located on the exit side of the rod lens array 15 and is substantially orthogonal to the first reflecting surface 13a, and reflects the light reflected from the document by the light source above the optical axis of the rod lens array 15. .

Reference numeral 14 is a reading glass plate, 15 is a rod lens array in which the optical axis is arranged in parallel with the original conveying surface, and 1
6 is an LED for illuminating the original surface, 17 is a photoelectric conversion element mounted on the flexible substrate 19 or the like and joined to the bottom surface of the reading glass plate 14, and 18 is a recess provided in the rear portion of the first reflecting surface 13a. .

(Second Embodiment: See FIG. 2) FIG. 2 is a structural explanatory view of an image reading apparatus according to a second embodiment of the present invention. In Example 2 shown in FIG. 2, 19 is a flexible substrate, and 19
a is a photoelectric conversion element mounted on the bottom surface of the flexible substrate 19, 19b is an LED mounted on the upper surface of the flexible substrate 19, and 20 is a recess for accommodating the LED 19b provided on the reading glass plate 14. Other symbols are the same as those in the first embodiment.

(Third Embodiment: See FIG. 3) FIG. 3 is a structural explanatory view of an image reading apparatus according to a third embodiment of the present invention. In the third embodiment shown in FIG. 3, reference numeral 21 denotes a concave curved surface on which the LED 19b provided on the reading glass plate 14 collects light to reliably illuminate the original 11. Other symbols are the same as those in the first embodiment.

Next, the operation of the image reading apparatus of the first embodiment shown in FIG. 1 will be described. The original 11 set by the user of the apparatus is pressed and conveyed on the reading line by the platen roller 12. On the reading line, the image on the original 11 is illuminated by the LED 16 arranged in the recess 18 provided in the rear surface of the first reflecting surface 13a, and the first reflecting surface 13a,
An optical path of the rod lens array 15 and the second reflecting surface 13b is taken, and an image is formed on the photoelectric conversion element 17 as an equal-magnification erect image for image reading (FIG. 1).

In the case of the second embodiment shown in FIG. 2, the photoelectric conversion element 19a and the LED 1 are provided on the same flexible substrate 19.
By forming 9b, the number of constituent parts can be further reduced. Others are the same effects as the first embodiment.

In the case of the third embodiment shown in FIG. 3, the LED 1 is provided by forming the concave curved surface 21 on the reading glass plate 14.
9b can illuminate the document 11 more reliably. Others are the same effects as the first embodiment.

[0018]

As described above, according to the present invention, the photoelectric conversion element substrate is arranged near the reading glass plate, and the light on the original surface is reflected by the two reflecting surfaces toward the reading glass plate and projected onto the photoelectric conversion element substrate. Since the configuration is such that light is emitted and the first reflection surface, the second reflection surface, and the main body housing are integrated, or the photoelectric conversion element and the LED are formed on the same flexible substrate, the rod lens array It is easier to dispose the optical axis in parallel with the document reading surface, and thus the apparatus can be downsized and the number of constituent parts can be reduced as much as possible.

[Brief description of drawings]

FIG. 1 is a structural explanatory diagram of an image reading apparatus according to a first embodiment of the present invention.

FIG. 2 is a structural explanatory diagram of an image reading apparatus according to a second embodiment of the present invention.

FIG. 3 is a structural explanatory view of an image reading apparatus according to a third embodiment of the present invention.

FIG. 4 is a structural explanatory view of a conventional image reading device.

[Explanation of symbols]

 Reference numeral 11 original document 12 platen roller 13 main body housing 13a first reflecting surface 13b second reflecting surface 14 reading glass plate 15 rod lens array 16 LED 17 photoelectric conversion element 18 recess 19 flexible substrate 19a photoelectric conversion element 19b LED 20 recess 21 concave curved surface

Claims (3)

[Claims] 1. A reading glass plate through which a document passes along the front surface, and L for illuminating the surface of the document through the reading glass plate.
ED, a rod lens array having an optical axis arranged in parallel with the document surface, a first reflecting surface for reflecting light from the document surface that has passed through the reading glass plate and making it enter the rod lens array, and the rod. A second reflection surface that reflects light emitted from the lens array and a photoelectric conversion element substrate that receives the reflected light from the second reflection surface are provided in the main body housing, and the photoelectric conversion element substrate is read. It is arranged near a glass plate, the second reflecting surface reflects light in the direction of the reading glass plate, and the first reflecting surface, the second reflecting surface and the main body housing are integrally formed. An image reading device characterized by the above. 2. The image reading apparatus according to claim 1, wherein the LED and the photoelectric conversion element are provided on the same flexible substrate. 3. The image reading apparatus according to claim 1, wherein the inside of the reading glass plate receiving the irradiation light from the LED is depressed in a concave curved surface.