JP2669201B2 - Image reading device - Google Patents

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 using a line sensor, and more particularly to an image reading apparatus which moves an original manually to photoelectrically read the image of the original.

[0002]

2. Description of the Related Art A handy image scanner, which is a manual scanning type image reading device that photoelectrically reads an image on a document by manually moving the document on the document, has an operation button and an LED, which is an indicator lamp, on an upper case. Is provided. Further, the lower case is provided with a reading window for reading a document, a fluorescent lamp for irradiating the document through the reading window, and an optical unit for guiding the reflected light from the illuminated document to the line sensor. Further, the switch pressed by the operation button and the LE
D is mounted on the operation board. Conventionally, this operation board is screwed to the upper surface of the holder of the optical unit.

[0003]

However, according to the conventional image reading apparatus configured as described above, when the switch is pressed by the operation button, a pressing force is applied to the optical unit via the operation board, and the optical system is operated. There was a problem that the image quality deteriorates due to distortion.

In order to solve this problem, if the operation board is screwed to the upper case, it becomes difficult to connect the wiring between the main board provided in the lower case and the operation board, resulting in a drawback that the number of assembling steps increases.

The present invention has been made in view of the above circumstances, and the image reading does not deteriorate the image quality because the pressing force of the operation button is not applied to the optical unit, and the number of assembling steps can be reduced. The purpose is to provide a device.

[0006]

The image reading apparatus of the present invention comprises:
It has an optical holder to which a mirror, a lens and a light receiving element are attached, a lower case in which the optical holder is housed, an upper case in which operation buttons are provided, and an operation board in which a switch pressed by the operation buttons is mounted. In the manual scanning type image reading device, the operation board is optically
It is characterized in that it is attached to the lower case so as not to contact the holder .

[0007]

In the image reading apparatus having the above structure, since the operation board is supported by the lower case so as not to come into contact with the optical holder through the support column, even if the switch on the operation board is pressed by the operation button, the operation board is pushed. No pressure is applied to the optical unit and the image quality does not degrade. Further, since the wiring between the operation board and the main board can be performed before the upper case is attached, the number of assembly steps can be reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the image reading apparatus of the present invention will be described below with reference to the drawings.

1 to 3 show the configuration of an embodiment of the present invention. In FIG. 1, a main roller 2 is provided on a lower surface of a lower case 1.
And the auxiliary roller 3 are rotatably attached. A reading window 4 is provided on the lower surface of the lower case 1 near the main roller 2, and a reading cover 5 formed of a transparent member is attached to the reading window 4. Further, a fluorescent lamp 6 is provided inside the reading cover 5 so as to irradiate a document 8 placed under the handy image scanner 7.

An optical holder 10 for accommodating the optical unit 9 is provided in the lower case 1, and a mirror 11 and a lens 12 constituting the optical unit 9 are provided in the optical holder 10.
The line sensor 13 (light receiving element) is arranged on the same optical axis. The main substrate 1 is provided below the optical holder 10.
The auxiliary substrate 15 is mounted on the main substrate 14 at right angles to the main substrate 14, and the line sensor 13 is mounted on the auxiliary substrate 15. The image on the original 8 illuminated by the fluorescent lamp 6 is reflected by the mirror 11, reduced by the lens 12 and formed on the line sensor 13.

A first gear 16 is coaxially fixed to the main roller 2, and the rotation of the main roller 2 is controlled by the first gear 1.
6, the second gear 17, and the third gear 18 are transmitted to the rotary encoder 19. The travel distance of the handy image scanner 7 is measured by detecting a large number of holes (not shown) concentrically formed in the rotary encoder 19 with a photo interrupter (not shown).

An operation button 21 and an LED 22 are provided at the center of the upper surface of the upper case 20, and the LED 22 is mounted on an operation board 23. Further, the operation board 23 is provided with a switch 24 which is pressed by the operation button 21. The operation board 23 includes a support column 25 and a rib 2 which are erected on the lower case 1 as shown in FIGS.
It is supported by 6 so as not to contact the optical holder 10 of the optical unit 9. In the figure, reference numeral 27 is a cable for transmitting the image signal read by the line sensor 13 to an external device.

According to the present embodiment, the operation board 23 includes the support 2
5 is supported by the lower case 1 through the ribs 26 and the ribs 26, the pressing force is not applied to the optical unit 9 when the switch 24 is pressed by the operation button 21, the optical system is not distorted, and the image quality is deteriorated. There is no. In addition, the upper case 20
Before attaching the lower case 1 to the main board 14 and the operation board 2
3, wiring can be performed, so that the number of assembly steps can be reduced.

In the above embodiment, the case where the operation board 23 is supported by one support column 25 and one rib 26 has been described, but the number of support columns 25 and ribs 26 is not limited to one. The support 25 and the rib 26 may be formed separately and fixed to the lower case 1 or may be formed integrally with the lower case 1.

[0015]

As described above, according to the image reading apparatus of the present invention, the operation board is brought into contact with the optical holder through the support.
Since it is attached to the lower case so as not to touch , the pressing force of the operation button is not applied to the optical unit, so that it is possible to prevent the deterioration of the image quality due to the distortion of the optical system. Also, in the lower case
When the main board is arranged , wiring between the main board and the operation board can be performed before attaching the upper case to the lower case, so that the number of assembling steps can be reduced.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional explanatory view showing a configuration of an embodiment of an image reading apparatus of the present invention.

FIG. 2 is a plan view showing a configuration of a lower case of FIG. 1;

FIG. 3 is a side view of FIG. 2;

[Explanation of symbols]

 1 Lower case 7 Handy image scanner (image reading device) 10 Optical holder 11 Mirror 12 Lens 13 Line sensor (light receiving element) 20 Upper case 21 Operation button 23 Operation board 24 Switch 25 Strut

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masa Sugimoto, 10th Hanazono Todocho, Ukyo-ku, Kyoto Prefecture, Kyoto Prefecture Omron Co., Ltd. In-company (56) References Hikaru 3-28627 (JP, U)

Claims (1)

(57) [Claims] 1. An optical holder to which a mirror, a lens and a light receiving element are attached, a lower case accommodating the optical holder, an upper case provided with operation buttons, and a switch pressed by the operation buttons. In the manual scanning type image reading device having the operated operation board, the operation board is prevented from coming into contact with the optical holder through the support .
Image reading apparatus being characterized in that attached to Uni the lower case.