JPS63292761A - Hand scanner device - Google Patents

Abstract

PURPOSE:To decrease the distance from the end face of a scanner main body up to the read position by aligning an optical axis of an optical system member with a center axis of a detection roller for detecting moving quantity of the scanner main body. CONSTITUTION:The central axis of the moving quantity detection roller 8 of a scanner main body 15 in pairs to the left and right provided corresponding to the read width of an original 1 is arranged so as to be aligned to the read optical axis of the optical system member comprising a light source 2, a rod lens array 3 and a solid-state image pickup element 4 and a retainer 18 preventing floating of the original is provided in front of the read position. Thus, the distance from the end face of the scanner main body till the read position is decreased and the floating of the original is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] This invention optically reads image information of a document or the like by one person while moving over the surface of the document.

The present invention relates to an improvement of a hand scanner device for outputting the read failure signal to the outside.

[Conventional technology]

FIG. 5 is a diagram showing the internal configuration of a conventional hand scanner device disclosed in Japanese Patent Application Laid-Open No. 16431/1988.
In the above, (l) is a document, (2) is a light source that illuminates this document (1), and (31 is a device that images the reflected light from the document (1) on the surface of a solid-state image sensor (4), which will be described later). (4I is the above-mentioned solid-state imaging system for converting the original signal into an electrical signal, and (C) is the solid-state imaging device (drive circuit and signal conversion circuit for driving 4j). (8) is a detection roller for detecting the reading movement amount, (9) is an auxiliary roller provided in front of this detection roller, and α fathom is the detection roller (81).
An encoder rotates in synchronization with the rotation angle and detects the moving lid as a rotational angle variable, a is the main body of the scanner, and αη is a storage unit for storing read signals.

Next, the operation will be explained. The scanner itself costs $$ and the manuscript (
1) Install the scanner on the tt and turn on the power.
When S is moved, the detection roller (8) rotates, and the encoder α also rotates in synchronization with this detection roller.
The rotation angle of the detection roller (81) is detected.

A pulse is output to the control unit (C) and the light source (2) is turned on.

The light reflected from the original (1) irradiated by the rod lens array (31) is imaged onto the solid-state imaging element (41) and read, and an analog signal is output to the control unit (C). In this control unit CC), the input analog signal is A/D converted and stored as a digital signal in the storage unit (
171 and stored. This operation is performed in conjunction with the movement of the scanner main body α5, and the document (1) is threaded.

[Problem to be solved by the invention] Since the conventional hand scanner device is configured as described above, the distance from the end face of the scanner body aS to the reading position is relatively long. There were other problems in that it was not possible to read the edge of the document, and the object-to-image distance of the optical system member changed due to the lifting of the document, causing the read image to become distorted.This invention solves the above problems. The purpose is to shorten the distance from the end surface of the scanner body to the reading position so as to solve this problem, and to keep the object-image distance of the optical system member constant.

[Means for solving problems]

The hand scanner device according to the present invention includes a pair of left and right moving member detection rollers (81) provided corresponding to the reading width of a document (1), a central axis of a scanner body α9, a light source (2), a rod lens, and a central axis of the scanner body α9. The optical system member consisting of the array (3) and the solid-state imaging probe +41 is arranged so as to coincide with the reading optical axis thereof, and a holding plate ttaf for preventing the document from floating is provided in front of the reading position.

[Effect]

In the case of this invention, the distance from the end surface of the scanner body to the reading position is short (as well as the lifting of the original is prevented).

〔Example〕

An embodiment of this invention will be described below. That is, in FIGS. 1 to 4, (l) is the manuscript.

(21 is a light source that irradiates this original (1), (3) is a rod lens array for imaging the reflected light from the surface of the original (1) on the surface of a solid-state imaging probe (41), (4I (51 is the drive circuit board for driving this solid-state imaging device (41), (6+, (71 is the solid-state imaging device) A conversion circuit board for converting the read signal from the imaging probe (41), (81 is in contact with the surface of the original (1) at the reading position, and its central axis is above ":ye@+21. Rod lens array (3) and a solid-state imaging cord (41), and were provided in correspondence with the reading width of the original (1) so as to coincide with the optical axis of the optical system member consisting of the solid-state imaging cord (41). ) are the auxiliary rollers located in front of these detection rollers (81, which keep the scanner body 15 perpendicular to the original @ (1) surface and press the original (1); μG in FIG. 2 is the above-mentioned state detection roller. (Gears installed at 81, αn, a
7J is a gear for connecting gear 1) (l) to gear 0 attached to the rotating shaft of encoder a4, and the SS output of the detection roller (8) is detected as the rotation angle by the encoder α4. a9 is the scanner body, αe in Fig. 3 is an extension extending forward from the central axis of the gear αD to connect the left and right detection rollers (8), and n is the axis of the auxiliary roller (9). The holding plate 3 shown in Fig. 1, which is attached as its rotating shaft to prevent the original (1) from lifting up, is wound around the shaft of the auxiliary roller (9), and the rear free end of the holding plate αa is This is a spring that constantly presses the lower blade.

Next, the operation will be explained. Place the scanner body (15) on the document (1) and press the start switch an.
2) lights up. Then, when the scanner main body 4 is moved with the start switch αD pressed, the detection roller (8) and auxiliary roller (9) are pressed down on the original (1) by the presser plate and the spring 0. Rotate and move along. At this time, the left and right detection rollers (8) are rotated simultaneously on the left and right sides by a shaft tte attached to a gear U that is connected via a gear aG. - The rotation of the gear QG is transmitted to the gear a3 through the gear wheel υ and α2, and the encoder I connected to this gear αj is rotated to rotate the amount of movement of the detection roller (8). The solid-state imaging probe (41), which is a reading sensor, or the drive circuit board (5) synchronizes with the pulse from this encoder A4
1, and the light reflected from the surface of the document (1) illuminated by the light source (21) is read as an optical signal imaged by the rod lens array (31) onto the solid-state imager (41). A circuit board (6
(After being A/D converted by 71, the digital signal is output to the outside.

The above operation is carried out while the scanner body is being moved while the start switch αD is being pressed.

Then, release the push of the start switch to turn it off.
The light source goes out and the reading operation is stopped.

In the above embodiment, reading is performed while the start switch αη is pressed, or a start switch is provided on the scanner body (1) that automatically turns on. good.

Further, in the above embodiment, the gears αG to 03 are used as a means for transmitting the rotational motion of the detection roller (8) to the encoder I, or a belt-based transmission means may be adopted. As described above, in the scanner device, the optical axis of the optical system member and the central axis of the detection roller for detecting the amount of movement of the scanner body are aligned.

The distance from the front surface of the scanner body to the reading position can be shortened, and since the original is held down by a presser plate during scanning, the distance between the object and image of the optical system components at the reading position is always constant. In addition, it is possible to prevent the light from passing through the optical axis from the light source due to the raised camphor tree.

[Brief explanation of drawings]

FIG. 1 is a sectional side view of a main part of a reading section in an embodiment of the hand scanner 1tic of the present invention. FIG. 2 is a side sectional view of the main part showing the power transmission means, the third factor is an enlarged plan view showing the drive section, the fourth factor is a front view showing the internal configuration of an embodiment of the present invention, and the fifth factor is a side sectional view of the main part showing the power transmission means. The reason is that this is a side sectional view of the main parts of a conventional hand scanner device. In the figure, 6(l) is the original, (2) is the light source, (3) is the rod lens array, (4I is the solid-state imaging probe, +81) 1
detection roller. a3 is the scanner body, (Ls&l presser plate, +19
It is a spring.

Claims (3)

[Claims] (1) The reflected light from the document surface irradiated by the light source,
an optical system member for forming an image on the solid-state image sensor surface through a rod lens array; and a pair of left and right optical system members arranged such that the central axis thereof coincides with the reading optical axis of the optical system member and corresponds to the reading width of the document; A hand scanner device comprising a roller for detecting the amount of movement of a scanner body. (2) From the central axis of the movement detection roller of the scanner body,
2. The hand scanner device according to claim 1, further comprising a holding plate for holding down the document, which is extended to a predetermined length in the reading movement direction. (3) The hand scanner device according to claim 2, wherein the free end of the document holding plate is held down by a spring so as to be able to move up and down.