JPH0312557B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electronic blackboard that optically reads a written image written on a blackboard or whiteboard and obtains a reproduced image thereof.

BACKGROUND TECHNOLOGY Several electronic blackboards have been proposed in the past that automatically read the image of writing written on the blackboard and obtain a reproduced image in order to improve the efficiency of meetings.

FIG. 5 is a schematic perspective view of the electronic blackboard proposed in Japanese Utility Model Application Publication No. 57-176767, and FIG. 6 is a schematic sectional view showing the reading section thereof. In FIGS. 5 and 6, 100 is a blackboard, 102 is a rail, 104 is a reading head that moves on the rail 102, and 106 is a recording unit for obtaining reproduced images. Further, 107 is a stopper for preventing the reading head 104 from falling off the rail 102. On the other hand, in FIG. 6, 108 is a fluorescent lamp, 110-1 to 110-5 are spherical lenses, and 112-1 to 112-6 are image sensors. Then, the light from the fluorescent lamp 108 is irradiated onto the blackboard 100 on which the written image is recorded, and the reflected light is guided to the image sensor 112 via the lens 110, and the image sensor 112 performs photoelectric conversion. The image signal obtained by the image sensor 112 is subjected to appropriate electrical processing and then input to the recording section 106, where it is recorded. Below, the reading head section 104
is moved in the longitudinal direction of the blackboard 100 using a motor or the like, and the recording paper of the recording unit 106 is moved in synchronization with the movement, and the above reading and recording operations are repeated, thereby automatically recording the written image on the blackboard 100. It is possible to obtain a reproduced image of a predetermined size. Of course, it is also possible to obtain a plurality of reproduced images by storing the image signal in a memory or the like.

Problems to be Solved by the Invention However, according to the above-mentioned conventional electronic blackboard,
A major drawback was that the workability of attaching and detaching the reading head 104 and replacing the fluorescent lamp 108 was extremely poor. That is, in FIG. 5, the reading head 104 and the rail 102 are coupled so as to eliminate degrees of freedom other than the direction of movement of the reading head 104 in order to perform the reading operation with high precision. Therefore, when attaching or removing the reading head 104 from the rail 102, it is necessary to remove the stopper 107 and attach the reading head 104 to the rail 102.
04 was separated from the rail 102. Furthermore, each time the fluorescent lamp 108 is replaced, the reading head must be removed from the rail 102, which is difficult for ordinary users to carry out.

As described above, in conventional electronic whiteboards, there is no degree of freedom between the reading head and the rail other than the direction of movement of the reading head, so the workability of attaching and removing the reading head is poor, especially when using a fluorescent lamp. The problem was that the reading head had to be removed every time it was replaced.

In view of the above-mentioned problems, the present invention provides an electronic blackboard in which the reading head can be easily attached and removed, and in particular, the fluorescent lamp can be easily replaced.

Means for Solving the Problems In order to solve the above problems, an electronic blackboard according to the present invention includes a blackboard, an arm extending in a direction perpendicular to the longitudinal direction of the blackboard, and an arm extending in the longitudinal direction of the blackboard. A recording device that performs recording based on a rail, a movable table that moves on the rail, an optical reading device that includes a light source, a lens, and a photoelectric conversion element attached to the arm, and an image signal output from the optical reading device. and a drive means for moving the movable table in the longitudinal direction of the blackboard, one end of the arm is rotatably connected to the movable table, and the other end of the arm is provided with a drive means for moving the movable table in the longitudinal direction of the blackboard. Rotating means is provided which is rotatable in the direction of movement and abuts against the blackboard or a frame extending in the longitudinal direction of the blackboard.

Effects According to the present invention, with the above-described configuration, the movable table and the arm are rotatably coupled, so when replacing the fluorescent lamp or cleaning the lens, the work can be easily carried out by simply lifting the arm. When removing or attaching the moving platform and arm from the rail, simply lift the arm until it does not engage with the stop member, and then move the moving platform in that state to remove the moving platform and arm from the rail. be able to.

Embodiment Hereinafter, an electronic blackboard according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a schematic perspective view of an electronic blackboard in one embodiment of the present invention. In FIG. 1, 10 is a blackboard, 12 is a frame of the blackboard 10, 14 is a rail attached to the upper side of the frame 12, 16 is a moving table that moves on the rail 14, 1
8 is an arm, and 20 is a shaft rotatably connecting the movable table 16 and the arm 18. Reference numeral 22 is a stop member that prevents the movable table 16 and arm 18 from falling off the rail 16, and 24 is a box in which recording means and control means (not shown) are housed. Note that the movable table 16, arm 18, and box 24 are connected by a cable not shown in FIG.

On the other hand, FIG. 2 shows a schematic longitudinal cross-sectional view of the moving table 16 and the arm 18, and FIG. 3 similarly shows a schematic cross-sectional view. In FIGS. 2 and 3, reference numeral 26 denotes an equal-magnification lens array that is attached to the arm 18, has approximately the same length as the short side length of the blackboard 10, and has a small aperture angle, and 28 denotes an equal-magnification lens array 26. This is an image sensor in which photoelectric conversion elements (not shown) are arranged in a line at a predetermined density along the line.
On the other hand, in FIG. 2, 30 is a cable connecting the moving table 16 and the box 24;
34 is a pinion provided on the rotating shaft of the pulse motor 32; 36 is provided on the arm 18 and is in contact with the frame 12;
It is a roller that can rotate in the long side direction of 0. Note that the rail 14 is a rail portion 14a for the movable table 16.
and a rail portion 14b for the cable 30, and the cable 30 freely moves within the rail 14b. Further, a rack is provided on the rail 14a and meshes with the pinion 34. Furthermore, in FIG. 3, 38 is a fluorescent lamp.

The operation of the electronic blackboard having the above configuration will be explained below. During start-up, the arms 18 are positioned at either end of the blackboard 10, and upon receiving a start instruction, the fluorescent lights are illuminated. Next, the pulse motor 32 rotates, thereby moving the moving table 16 and the arm 18 to the first position.
Move in the direction of arrow A in the diagram or in the opposite direction. at the same time,
The image sensor 28 is driven, and the fluorescent light 38 converts the reflected light from the blackboard 10 illuminated by the same-magnification lens array 26 into an electrical signal.
Output as an image signal. After this image signal has been appropriately processed, it is sent to the box 2 through the cable 30.
4, and is reproduced and recorded by the recording means in the box 24. Thereafter, by driving the image sensor 28 in synchronization with the driving of the pulse motor 32, a reduced reproduction image of the writing image on the blackboard 10 can be obtained in the box 24.

The above is the general operation of the electronic whiteboard according to this embodiment. Next, the replacement work of the fluorescent lamp 38 and the removal and installation work of the movable table 16 from the rail 14 will be explained using FIG. 4. FIG. 4 is a schematic side view of the electronic blackboard showing a state in which the arm 18 is lifted, and the same members as in FIGS. 1 and 2 are given the same reference numerals. When replacing the fluorescent lamp 38, the arm 18 and the moving table 16 are connected to the shaft 2.
Since the arms 18 are rotatably connected as shown by the arrow A at 0, the arm 18 can be lifted up as shown in FIG. Therefore, replacing the fluorescent lamp 38 is as follows:
It can be carried out in the state shown in Fig. 4. in this way,
The fluorescent lamp 38 can be replaced by simply lifting the arm 18.

Further, the operation of removing the movable table 16 and the arm 18 from the rail 14 will be explained. First, as shown in FIG. 4, lift the arm 18 so that the arm 18 and the stop member 22 provided on the frame 12 of the blackboard 10 do not engage with each other.
0, the moving table 16 and arm 18 are separated from the rail 14 by simply moving the moving table 16 and the arm 18 in the long side direction. Conversely, when attaching the arm 18 and the movable base 16 to the rail 14, the procedure for removing the arm 18 and the moving table 16 described above may be reversed. In this way, according to this embodiment, the arm 18 and the moving table 16 can be attached to the rail 14,
The work of removing it from the rail 14 can be much easier than in the past.

Note that when the arm 18 and the movable table 16 are rotatable about the shaft 20, the equal-magnification lens array 26 and image sensor 28 in the arm 18 and the blackboard 10
There is a concern that the distance between the arm 1 and the
The blackboard 10 is rotatable in the moving direction of the blackboard 10.
Since the roller 36 is provided in contact with the frame 12, the distance between the blackboard 10, the lens array 26, and the image sensor 28 is always constant, and a normal reading operation is performed without blurring.

Further, in this embodiment, the roller 36 is brought into contact with the frame 12, but it may be brought into direct contact with the blackboard 10.

Effects of the Invention As described above, according to the present invention, a blackboard, a fluorescent lamp that illuminates the blackboard, an arm extending in a direction perpendicular to the longitudinal direction of the blackboard, and a rail extending in the longitudinal direction of the blackboard, A movable table that moves on a rail, an optical reading means that is attached to an arm and includes a light source, a lens, and a photoelectric conversion element, a recording means that performs recording based on an image signal output by the optical reading means, and a movable table. A driving means for moving the blackboard in the longitudinal direction, one end of the arm is rotatably connected to the moving table, and the other end of the arm is rotatable in the moving direction of the arm and is provided with a drive means that is rotatable in the longitudinal direction of the blackboard. By providing a rotating means that comes into contact with the extended frame, it is possible to easily perform the necessary work to replace the fluorescent lamp, and also to easily remove the arm and moving platform from the rail and attach it to the rail. Can be done.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of an electronic blackboard according to an embodiment of the present invention, FIG. 2 is a schematic longitudinal cross-sectional view of the main parts, FIG. 3 is a schematic cross-sectional view of the main parts, and FIG. 4 is an arm FIG. 5 is a schematic perspective view of a conventional electronic whiteboard, and FIG. 6 is a schematic cross-sectional view of the reading head of the same main part. 10...Blackboard, 12...Frame, 14...Rail,
16...Moving table, 18...Arm, 20...Axis,
22...stop member, 26...lens array, 28
...Image sensor, 32...Pulse motor, 3
6...Roller.

Claims (1)

[Claims] 1. A blackboard, a frame for holding the blackboard, and a rail provided along the upper side of the frame.
a movable platform movably provided on the rail; a driving means for moving the movable platform in the longitudinal direction of the blackboard; an arm extending in a direction perpendicular to the longitudinal direction of the blackboard; arm connecting means rotatably connected to the movable table around the stand; arm supporting means rotatably provided at the other end of the arm and abutting the frame; and arm supporting means detachably provided to the arm and connected to the blackboard. a fluorescent lamp for illuminating the blackboard, a reading means provided on the arm for reading image information on the blackboard, and a recording means for recording the image information read by the reading means,
An electronic whiteboard characterized in that the arm is rotatably held around the movable base to facilitate replacement of the fluorescent lamp.