JP2008005453A - Reading apparatus for electronic blackboard - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image reading apparatus used for an electronic blackboard apparatus wherein when the reading apparatus is positioned and fixed to the electronic blackboard apparatus, the position is simply adjusted. <P>SOLUTION: The lighting apparatus used for the electronic blackboard apparatus is characterized by including: a base; an image capturing lens arranged on the base; a lens support member for supporting the lens and fixed to the base in a way capable of adjusting the position of the lens in the optical axis direction; an imaging element for imaging an image made incident onto the lens as electronic data; and an imaging element support member for supporting the imaging element and fixed to the base in a way adjustable in the position of the lens in a direction perpendicular to the optical axis. The position of the lens can be adjusted only in the optical axis direction, and the imaging element is fixed to the base in the optical axis direction and the position of the imaging element can be adjusted only in the direction perpendicular to the optical axis. Further, the position of the lens support member and the position of the imaging element support member are adjusted by using an extraction/contraction force of springs respectively with respect to the base, the adjustment is facilitated. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to an electronic blackboard, and more particularly to an electronic blackboard reader that can be easily adjusted when a reading device for reading an image written on a writing sheet is attached to the main body of the electronic blackboard.

The electronic blackboard writes characters and figures with a marker on a white writing sheet, reads the written surface as image information with an optical sensor, reduces the read image information, prints it on paper, or records it. It is characterized by having a function.

Japanese Patent Application Laid-Open No. 2001-309120 shows an example of an optical reading device used for a facsimile or the like.
This optical reading device has a screw hole for attaching a lens casing and a CCD casing to a flat base material, and each casing can be horizontally adjusted and arranged and fixed with respect to the substrate surface.

JP 2001-309120 A

In the above Patent Document 1, the lens casing and the CCD casing can be moved and adjusted two-dimensionally horizontally with respect to the substrate surface, and can be positioned and fixed. Therefore, the position can be adjusted with high accuracy. There is, but adjustment is troublesome.

In order to solve the above-described problems, the present invention provides a base, a lens for capturing an image arranged on the base, and the lens in the optical axis direction while holding the lens. A lens holding member fixed to the base, the position of which can be adjusted, an image pickup device for picking up an image incident on the lens as electronic data, and holding the image pickup device and a lens perpendicular to the optical axis. And an image sensor holding member fixed to the base so that the position thereof can be adjusted.

According to a second, third, and fourth aspect of the present invention, a spring that expands and contracts in the optical axis direction is provided between the lens holding member and the base.
Further, a plurality of springs that extend and contract in a direction perpendicular to the optical axis are provided between the imaging element holding member and the base.
In addition, the lens holding member is provided in a direction perpendicular to the optical axis and holds the lens, and is provided in the optical axis direction to hold a fixed position on the base in an adjustable manner. The second plate having a plurality of screw holes is configured in an approximately elbow shape.

According to the electronic blackboard of the present invention, the position of the lens can be adjusted only in the optical axis direction, and the position of the image sensor can be adjusted only in the direction perpendicular to the optical axis while the optical axis direction is fixed with respect to the base. Yes.
In addition, since the lens holding member and the image sensor holding member are adjusted in position by using the force of the springs to expand and contract with respect to the base, adjustment work is facilitated.
For this reason, it is possible to easily perform position adjustment for image reading in the electronic blackboard device.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

In FIG. 2, the conceptual diagram which shows the structure of the main body back surface of the electronic blackboard apparatus with which the apparatus of one Example of this invention is used is shown.
1 is an electronic blackboard body frame, 2 is a writing sheet for writing on a surface (not shown) of the body, and 3 is a surface of the writing sheet 3 so that characters and pictures written on the writing sheet can be read on the back surface of the body 1. A light source unit 4 for illuminating the reading sheet 4 is a reading device (image scanner) constituted by a lens and an image pickup device for reading the description content of the writing sheet 2.
The writing sheet 2 is transferred by a motor (not shown) when reading an image.
In conjunction with the transfer operation, the writing sheet is illuminated by the light source unit 3 in the vicinity of the light source unit 3, and an image is captured by the reading device 4.
In this embodiment, a CCD is used as the image sensor.
In the light source unit 3, a plurality of semiconductor light emitting elements (LEDs) are used.

FIG. 3 is a diagram for explaining the reading operation, and is a conceptual view of the vicinity of the reading device 4 from above the electronic blackboard body.
The reading device 4 includes a lens 8 and an image sensor 12, and the light source unit 3 includes an LED light source 5 and a mirror 6.
The LED light source 5 is composed of a plurality of semiconductor light emitting elements arranged in a line in the vertical direction in the light source unit 3 shown in FIG. 1, and illuminates the writing sheet 2 in a rectangular shape with the vertical direction as the long side, The illuminated portion is read by the reading device 4 through the lens 8 as a reflected image of the mirror 6.

On the surface (not shown) of the electronic blackboard device shown in FIG. 2, for example, when the agenda of the meeting and the contents of the meeting are written with a marker on the writing surface of the writing sheet 2 and the print button is pressed by an operating means (not shown), control (not shown) The motor is driven by the apparatus, and the written surface is transferred to the back side of the main body, and the image reading operation described above is performed.
The read image is printed out by a printer (not shown).
The read image is recorded on a storage medium as digital image information.

FIG. 1 is a perspective view of the reading device 4 of this embodiment.
Reference numeral 7 denotes a base, 8 denotes a lens for capturing an image written on the writing sheet, 9 denotes a lens holding member, and 10 denotes a fixing screw for fixing the lens holding member 9 to the base 7.
Reference numeral 11 denotes a spring that stretches and holds the lens holding member 9, 12 denotes an image pickup device that picks up an image incident through the lens 8, 13 denotes an image pickup device holding member, and 14 denotes the image pickup device 12 relative to the base surface. A height adjusting screw for adjusting the height and inclination of the image sensor, 15 is a spring for extending and holding the image sensor holding member 13, and 16 is a fixing screw for fixing the image sensor holding member 13 to the base 7.

Although the base 7 has a first projecting portion X for fixing the lens holding member 9, an opening is formed on the wall surface for guiding the captured image to the image sensor 12 (not shown). ing.
In addition, the end portion of the base 7 has a second overhanging portion Y for fixing the image sensor holding member 13.

The lens holding member 9 has a substantially L-shaped plate structure. A lens is attached to one of the plates, and an opening long in the optical axis direction of the lens 8 is formed on the other plate. Two screw holes are provided.
The lens holding member 9 is fixed to the end of the first projecting portion X of the base 7 with the fixing screw 10 through the screw hole.
At this time, the position of the lens holding member 9 is adjusted in the optical axis direction indicated by the arrow A by the opening long in the optical axis direction, and the lens is positioned at an appropriate position by a predetermined image reading inspection device (not shown). If considered, the lens holding member 9 is fixed to the first projecting portion of the base 7 by the fixing screw 10.

When the position of the image sensor holding member 13 is adjusted in the directions of arrows B and C by the height adjusting screw 14 and the position of the image sensor is considered to be disposed at an appropriate position by a predetermined image reading inspection device (not shown), The image sensor holding member 13 is fixed to the second projecting portion Y of the base 7 by a fixing screw 16.

The present invention is not limited to the above-described one embodiment, and the structure of the base, the structure of the lens holding member and the image sensor holding member can be changed.
For example, the spring 11 may be disposed between the base 7 and the lens holding member 9 so as to enclose the lens barrel of the lens 8 inside.

The present invention can be used as a reading device for an electronic blackboard device used for meetings, presentations, and the like.

It is a conceptual diagram which shows the main structures which concern on the form of the Example of this invention. It is a reverse view of the electronic blackboard in which the reading apparatus of this invention is used. It is a top view for showing the reader operation of an electronic blackboard in which the reader of the present invention is used.

Explanation of symbols

4: Reading device 7: Base 8: Lens 9: Lens holding member 12: Image sensor 13: Image sensor holding member

Claims (4)

A base, a lens for capturing an image disposed on the base, a lens holding member that holds the lens and is fixed to the base so that the position of the lens can be adjusted in the optical axis direction, and the lens And an image sensor holding member that holds the image sensor and is fixed to the base so that the position of the lens can be adjusted in a direction perpendicular to the optical axis. An electronic blackboard reader. 2. The electronic blackboard reader according to claim 1, wherein a spring that expands and contracts in the optical axis direction is provided between the lens holding member and the base. 2. The electronic blackboard reader according to claim 1, wherein a plurality of springs extending and contracting in a direction perpendicular to the optical axis are provided between the imaging element holding member and the base. The lens holding member is provided in a direction perpendicular to the optical axis to hold the lens, and a plurality of lenses are provided in the optical axis direction to hold a fixed position on the base in an adjustable manner. The electronic blackboard reader according to claim 1, wherein the electronic blackboard reader is formed in a substantially elbow shape by a second plate having a screw hole.

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