JPS63206064A - Hand scanner device - Google Patents

Abstract

PURPOSE:To always and constantly keep the distance between an original surface and a reading means by providing an optical axis of a reading means at a position to pass the central axis of a pair of driving rollers respectively provided in the right and left of a scanning direction front part. CONSTITUTION:First, when a device is placed to the part which copies an original 1 and a starting switch 21 is pushed, a solid-state image pickup element 10, the power source of a driving control means 14, covering storage means 15 and 16 and a rotary encoder 20 is turned on and a light source 8 lights up. The irradiation light from the light source 8 is reflected on the surface of the original 1, image-formed through a rod lens array 9 on the solid-state image pickup element 10 and read. A read signal is synchronized to a pulse from the rotary encoder 20 and outputted to the converting storage means 15 and 16. Here, since the optical axis of the reading means is provided at the position to pass the central axis of the pair of main rollers 3, the information of the original of the part at the position where the main rollers 3 are mounted can be correctly read.

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention optically reads document information such as a document while moving over the surface of the document by nine people.

The present invention relates to a scanner device for outputting read signals to the outside.

[Conventional technology]

FIG. 4 shows a conventional hand scanner device of this type, which is shown in, for example, Japanese Patent Application Laid-open No. 164368/1989.
In Figure 1, (1) is a manuscript containing image information to be read, and (2: is a casing).

(3) is provided at the front in the traveling direction at the bottom of this casing, and is a pair of drive rollers that rotate while contacting the document (11 side); (4) is provided integrally with one of the pair of drive rollers. An encoder (5) is arranged around this encoder to detect the read movement amount, and a sensor (61 is a sensor that generates a pulse corresponding to the read movement amount based on the rotation of the encoder (4)); )
The original document (1
) Auxiliary roller (7) is provided at the forefront of the lower surface of the casing (2) and rotates while contacting the surface of the casing (
A switch (8) that operates when 21 is placed on the original (1) side is disposed approximately in the center of the lower part of the casing (2), perpendicular to the traveling direction, and is activated when the original (1) side is placed. A light source consisting of a straight tube lamp that emits irradiation light, and (9) is a rod lens array that receives reflected light from the original (1) based on the irradiation light from this light source, and is closely opposed to the light source (8). It is arranged at the lower center of the casing (2). (I
G is a solid-state image sensor provided on the surface where the light emitted from the rod lens array is focused;
) constitutes a reading means, which converts the document information on the document (1) side into a color analog electrical signal based on reflected light and outputs the signal. (11) drives the solid-state image sensor ilG, receives an analog electrical signal from the solid-state image sensor αG and a movement pulse signal from the sensor (5), and converts the analog electrical signal into a digital electrical signal. A control means for outputting, Q2Fi, a storage means for storing the digital electric signal from this control means as a read signal, and α3 a connector for sending the read signal stored in this storage means to an external device 1, such as a personal computer. .

Next, the operation of the hand scanner device configured in this manner will be explained. First, when you place the device on the part of the document (1) that you want to copy, the switch (7) is activated.

The control means I, the storage means aa, and the sensor (5) are powered on. Therefore, when the casing (2) is moved over the document (1) to be read, the drive roller (3) rotates.

At the same time, the encoder (41) also rotates, and the senna (5
) detects the rotation angle and inputs a pulse to the control means αυ. Meanwhile, the light source (8) is turned on at the same time.

The reflected light from the irradiated document (1) is imaged and read by the rod lens array (9) on the solid-state image sensor αω, and an analog electrical signal is output to the control means αD. The control means A/D converts the input analog electric signal and stores it as a digital electric signal.
Output it to Iz and store it.

For example, after completing the operations on the part to be copied in this manner, by connecting the connector α3 to the personal computer via a cable, the read original can be reproduced on the internal computer.

[Problem that the invention seeks to solve]

However, in the scanner device configured as described above, the reading means consisting of the rod lens array (9) and the solid-state image sensor α is disposed approximately in the center of the casing (2). However, when reading a thick object such as a book, the edge part cannot be read.

Further, when the original (1) is on a circular arc, the object-to-image distance between the original and the rod lens array (9) varies.

It also had the problem that the reading quality was poor and it was difficult to obtain clear reading information.

This invention was made in view of the above-mentioned points, and is a hand scanner that can read the edges of thick books such as books, and can obtain clear reading information even when documents are on an arc. The purpose is to obtain a device.

[Means for solving problems]

The hand scanner device according to the present invention includes a pair of main rollers that are provided on the left and right sides of one end in the running direction on the lower surface of the casing, and that rotate while abutting against the document surface, and an optical axis within the casing between the pair of main rollers. is disposed at a position passing through the central axis of the drive roller, and is provided with reading means for receiving reflected light from the document and outputting an electrical signal.

Ru.

[Effect]

In this invention, the optical axis of the reading means 9 is disposed at a position where it passes through the center axis of a pair of drive rollers disposed on the left and right sides of the front part in the running direction, and To read information and always keep the distance between an object and an object image between a document surface and a reading means constant.

[Embodiment] An embodiment of the present invention will be described below with reference to Figs. 1 to 4. In Fig. 1, (3) (3) is a casing (
1) A pair of main rollers are provided on the left and right sides of one end of the lower surface in the running direction, and rotate while contacting the document (11 surface), and are directly connected to gears (3a) (3a), respectively.

(6) is a long-axis auxiliary roller provided at the other end of the lower surface of the casing (2) in the running direction, and is used to move the casing (2) to the document (
1) The yK document (1) is rotated while holding the surface perpendicular to the surface. (8) is disposed at the bottom of the casing (2:) perpendicular to the traveling direction, and
) A light source consisting of a straight tube lamp that emits light onto a surface, (9
) is disposed in the casing (2) whose optical axis conducts electricity through the center axis of the drive roller (3), and receives reflected light from the document (1) based on the irradiation light from the light source (8). The rod lens array aQ is a solid-state imaging device provided on the imaging plane of the light emitted from this rod lens array, and together with the rod lens array (9), constitutes reading means 9,
The document information on the document (1) side is converted into an analog electrical signal based on the reflected light and output. (I41 is the above casing (
2), a drive control means consisting of a circuit board on which the solid-state image sensor (I [l) is attached and a circuit for driving the solid-state image sensor (IG) is installed; It consists of a circuit board disposed above the drive control means I in the casing (2) and incorporating a circuit that temporarily stores the analog electrical signal received from the solid-state image sensor αQ and converted into a digital electrical signal. The conversion/storage means, a?laη, is the gear (5g) (
A pair of first gears meshing with 5a), α8 are these first gears.
The shaft connecting the gears constitutes a first transmission means for simultaneously rotating the pair of main rollers (3) (3) together with the gears. aIc The first of the above pair
A second gear is meshed with one of the gears αη, and together with the first gear αη constitutes a second transmission means. c! l has a gear (20a) that meshes with this second gear, detects the rotation angle which is the amount of movement of the main roller (3), reads the pulse corresponding to the amount of movement, and converts and stores the pulses corresponding to the amount of movement σ5ti.
Rotary encoder outputs to e, c! υ is a start switch for starting reading, and when activated, the solid-state image sensor αQ and drive control means I are activated.

Conversion/storage means aSa/and rotary encoder (to)
Turn on the power.

Next, the operation of the hand scanner device configured in this manner will be explained. First, place the device on the part of the document (1) that you want to copy and press the start switch Qυ.
19 and the rotary encoder blade are turned on, and the light source (8) is turned on. Then, with the start switch QD pressed, the casing (2) is moved over the document (1) to be read.

Along with this, a pair of main rollers (3) and auxiliary rollers (
6) is brought into contact with the surface of the original (1) and is driven to rotate.

At this time, the pair of main rollers (3) are connected to the first transmission means αηα
Because they are virtually connected by barrels, they rotate at the same time and do not meander. Further, the rotational force of one of the main rollers (3) is transmitted to the rotary encoder (7) via the second transmission means shaft, and as the rotary encoder (to) rotates, The amount of movement of the roller (3:) is detected as a movement angle, and a pulse is sent to the drive control means I and the conversion/storage means <156G.

On the other hand, the irradiation light from the light source (8) is irradiated onto the original (11 sides), and one reflected light is reflected by the rod lens array (9) and is imaged onto the solid-state image sensor α and read. The analog electric signal i is output by the drive control means I to the conversion/storage means α!9αe in synchronization with the pulses from the rotary encoder (a).This conversion/storage means a
In Sa., an input analog electrical signal is converted into a digital electrical signal and stored in synchronization with the pulses from the rotary encoder. After completing the operations for the part you want to copy in this way, press the start switch QD.
When you release the button, the power turns off and the light source (8) also clears.
Reading 9 of the original (1) is completed. For example, by connecting a connector (not shown) to a personal computer via a cable, the read original can be reproduced and colored on the personal computer.

In the hand scanner device configured in this way, the optical axis of the reading means consisting of the rod lens array (9) and the solid-state image sensor Q[l] passes through the central axis of the pair of main rollers (3). Since the reading means 9 is disposed at the main roller (3), the document (
1) Information can be read.

Even thick objects such as books can be read to the edge. Moreover, since the distance between the reading means and the part of the main roller (3) in contact with the original +1) is kept constant without being affected by the original +1), even if the original (1) is on an arc, It can be read as a clear image. Moreover, although the reading means is disposed between the pair of main rollers (31), the first transmission means rotates the pair of main rollers (3:) at the same time, so the device itself runs in a meandering manner. Moreover, the drive control means I in which the solid-state image sensor ae is mounted and the circuit elements for driving the solid-state image sensor αe, and the circuit elements such as the raw converter and the storage section, are installed. Both the incorporated conversion control means (15ae) are constructed of circuit boards and are arranged in stages within the casing (21), so that the apparatus itself can be made compact.

Note that in the above embodiment, the start switch clD
It was assumed that the device was activated and deactivated in the 5th
Similar to the conventional example shown in the figure, the casing (2) is
It may also be a switch that operates by setting it to 1.

In addition, the rotational force of the main controller (31) is transferred to the rotary encoder (
Although the second transmission means for transmitting the signal 1) is constructed of a gear mechanism, it may also be a transmission mechanism using a belt.

Further, although the drive control means a3 and the conversion/storage means αη are constructed using separate circuit boards, they may be constructed using a single circuit board.

〔Effect of the invention〕

As described above, this invention has a structure in which the optical axis passes through the central axis of the field 2, in the casing between the pair of rollers provided on the left and right sides of one end in the running direction in the lower part of the casing. Since we have installed a reading device that receives light and outputs it as an electric signal, it is possible to read the document information up to the part where the roller places it on the document, so even if the document is like a book, it can read all the way to the edge. Moreover, the distance between the reading position of the original and the reading means can be kept constant at all times, so that the original information can be read clearly.

[Brief explanation of the drawing]

Figures 1 to 4 show one embodiment of the present invention.
The figure is a cross-sectional side view, and the second figure is a cross-sectional plan view. FIG. 3 is an internal sectional horizontal view, and FIG. 4 is a sectional side view. FIG. 5 is a cross-sectional side view showing a conventional hand scanner device. In the figure, (1) is the ti manuscript, (2) is the casing, (
3) is the main roller, (81 is a light source, (91 (1) is a rod lens array and a solid-state image sensor that constitute a reading means, aηas is a first gear and a shirt that constitutes a first transmission means), a! J is the second transmission means constituting the second transmission means.
gears. (to) is a rotary encoder. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (3)

[Claims] (1) A pair of rollers provided on the left and right sides of one end in the running direction at the bottom of the casing and rotating while in contact with the document surface; a light source provided at the bottom of the casing that emits irradiation light onto the document surface; and the rollers. The roller is disposed in a casing between the rollers at a position where an optical axis passes through the central axis of the roller, receives reflected light from the document based on the irradiation light from the light source, and generates an electrical signal corresponding to the received reflected light. A hand scanner device equipped with a reading means for outputting. (2) The hand scanner device according to claim 1, wherein the pair of rollers are connected to each other by a transmission means. (3) The hand scanner device according to claim 1 or 2, wherein the rotational force of one of the pair of rollers is transmitted to a rotary encoder.