JP2785764B2 - Hand scanner device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reading apparatus for reading an original image by photoelectric conversion, and more particularly to a hand scanner apparatus connected or integrated with a facsimile, a copying machine, a word processor, a computer, and the like.

[0001]

2. Description of the Related Art Conventionally, a hand scanner of this type is excellent in that it can read a book or cardboard, can be reduced in size, and can read an arbitrary portion of a document, and has recently been widely used. .

FIG. 2 is a longitudinal sectional view showing an example of the conventional hand scanner. In the figure, a conventional hand scanner device includes a light source 1 for irradiating an original, a mirror 21
an optical system 2 comprising a, 21b, 21c and a lens 22;
A line message sensor 3 for receiving reflected light from the original through the optical system 2, a rotatable roller 4 in contact with the original, a light source 1, an optical system 2, and a frame 5 for holding the line image sensor 3; It is composed of exterior covers 6 and 7.

The light source 1 is composed of a plurality of light emitting diodes arranged in a reading line direction (main scanning direction) of a document, and emits light toward a reading position of the document. The reflected light from the reading position is reflected by the mirror 21 a, is then multiple-reflected between the mirrors 21 b and 21 c, and enters the lens 22. The lens 22 focuses incident light on the line image sensor 3. As a result, the density information of the document at the reading position is read by the line image sensor 3.

[0004] The exterior cover 6 is provided with rollers 4 for facilitating the movement of the hand scanner.

[0005]

The problem with the conventional hand scanner device is that when the document is read, if the device is grasped by the hand, the frame 5 is bent, which has a significant adverse effect on operability, or the frame 5 and the outer cover. Unusual noise due to the bending occurs between 6, 7 and 7, or the bending itself gives an uncomfortable feeling to the operator.

[0006] The reason is that in order to read an original having a full width in the main scanning direction, a space inside the frame 5 for allowing reflected light to pass when the original is irradiated, that is, a space having at least the full width of the original in the main scanning direction is required. This is because the reading start side 5a and the reading end side 5b of the frame 5 are connected only by the left and right side flesh, and the strength of the frame 5 against bending when an external force is applied is insufficient.

In use, the reading position of the document must be as close as possible to the end face of the frame 5, so that the strength of the frame 5 is further reduced.

[0008] An object of the present invention is to read a document,
An object of the present invention is to provide a hand scanner device that prevents bending caused by grasping the device frame with a hand.

[0009]

According to the present invention, there is provided a light source for irradiating a document with light, a line image sensor, a lens for forming reflected light from the document on the line image sensor, the light source and a line image. A frame that holds the sensor and the lens, and a reinforcing glass disposed at a position in the vicinity of the reading position of the document so as to straddle the optical path of the reflected light from the document, and both side surfaces in the longitudinal direction of the reinforcing glass are in contact with the frame. A hand scanner device characterized by being supported is obtained.

[0010]

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a longitudinal sectional view showing an embodiment of the hand scanning device of the present invention. In the figure, a hand scanner device includes a light source 1 for irradiating a document, a mirror 21a,
An optical system 2 composed of lenses 21b and 21c and a lens 22, a line message sensor 3 for receiving reflected light from the original through the optical system 2, and a rotatable roller 4 in contact with the original
, A light source 1, an optical system 2, a frame 5 for holding the line image sensor 3, exterior covers 6 and 7, and a reinforcing glass 8.

The frame 5 is fixed between the outer covers 7 and 6, and most of the frame 5 enters the space between the outer covers 6 and 7 and cannot be seen from the outside, but a part thereof (a part indicated by an arrow direction F). Is on the outside. The reinforcing glass 8 is sandwiched between the reinforcing glass supporting portions 5a and 5b of the frame 5, and the reinforcing glass 8
Is the direction of the reading position. Exterior cover 6
Is provided with a roller 4 for facilitating the movement of the hand scanner device.

The light source 1 includes a plurality of light emitting diodes arranged in a reading line direction (main scanning direction) of a document, and emits light toward a reading position of the document. Light reflected from the reading position passes through the reinforcing glass 8 and is reflected by the mirror 21a. After the reflection, the mirror 21b
The light is multiply reflected between the lenses 21 c and enters the lens 22. The lens 22 focuses incident light on the line image sensor 3.
As a result, the density information of the document at the reading position is read by the line image sensor 3.

According to the embodiment of the present invention, the reinforcing glass 8 is arranged near the original reading position and at a position across the reflected light from the original. There is an advantage that the frame 5 is not bent even when a force is applied from the outside, because the space of the fixed reflected light path is closed.

[0015]

As described above, according to the present invention,
It is possible to prevent the frame from bending when reading a document while holding the hand scanner device with the hand. As a result, the operability is improved, the abnormal noise generated between the frame and the outer cover is eliminated, and the discomfort and anxiety caused by the bending of the frame given to the operator are eliminated.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a conventional hand scanner device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Light source 3 Line image scanner 4 Roller 5 Frame 6 Exterior cover 7 Exterior cover 8 Reinforcement glass

Claims (2)

(57) [Claims] 1. A light source for irradiating a document with light, a line image sensor, a lens for imaging reflected light from the document on the line image sensor, and the light source, the line image sensor, and the lens are held. Frame and
A reinforcing glass disposed near a reading position of the document and across a light path of reflected light from the document, wherein both side surfaces in a longitudinal direction of the reinforcing glass are supported in contact with the frame. Hand scanner device. 2. The hand scanner device according to claim 1, wherein the frame is arranged and supported between a pair of exterior covers.