KR910003020Y1 - Blackboard transfor equipemnt - Google Patents

Abstract

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Description

Screen transfer device for electronic blackboard

Figure 1a is a front view of the conventional electronic screen transfer device.

Figure 1b is a side cross-sectional view taken along the line AA 'of Figure 1a.

Figure 2a is a front view of the screen transfer apparatus according to the present invention.

FIG. 2B is a partial detailed cross-sectional view of the drive roller and driven roller of FIG. 2A of FIG. 2C;

3 is a front view of the drive roller according to the present invention.

* Explanation of symbols for main parts of the drawings

1 and 11: driving roller 2 and 12: driven roller

3: screen 4: motor

5 belt 6 driving pulley

6 ': driven pulley 7: connection bar

8 and 18: shafts 11A and 12B: bush

11C: rubber coating 11B and 12B: protrusion

The present invention relates to a screen transfer device for an electronic blackboard, and in particular, a rubber coating having a high coefficient of friction, such as silicone rubber, is provided at both ends of a driving roller connected to a motor, and the screen is caused by friction between the driving roller and the screen according to the rotation of the motor. It relates to a screen transfer apparatus for electronic blackboard configured to transfer the.

The copyboard is to write the information determined at the meeting, seminar, and meeting progress on the screen transferred by the roller using a writing instrument such as a water-based pen, and to reduce the number of copies necessary for the spot and obtain a copy. The conveying device is a valve type screen conveying device. The pulleys are installed at both ends of the driving rollers and the driven rollers with the screens tightly connected, the pulleys connected to the belts are connected, and the connecting bar in the screen direction is attached to the inner surface of the screen. Both ends are fixed to the belt. Accordingly, the rotational force of the motor is transmitted to the pulley and the driving roller through the shaft, and the rotational force of the driving roller is transmitted to the driven roller through the belts connected to each pulley so that the screen is transferred by the driving roller, the driven roller, and the connecting bar. It is structured.

If the screen transfer device of such a structure does not maintain parallelism between the driving roller and the driven roller, the belt will be derailed during use, and if the belt frame is relaxed, the difference between the rotation between the driving roller and the driven roller will occur, and the accurate screen transfer will not be achieved. Will not. In addition, since the fixing bar is fixed through both ends of the connecting bar longer than the width of the screen attached to the inner surface of the screen, when the screen rotates, the driven and driving rollers make noise when contacting the connecting bar fixing part of the belt. It often occurred when the ship was derailed, and the screen part where the connection bar was attached occurred due to distortion. In addition, due to assembly tolerances between the pulley and the shaft, there is also a disadvantage that the noise is accompanied.

Accordingly, the present invention solves the disadvantages of the existing belt type screen transfer apparatus described above, and can transfer the screen more precisely without unnecessary members such as belts or connecting bars, and is configured to remove the noise generated by the screen for the electronic blackboard. The object is to provide a conveying device.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1A is a schematic front view of a conventional electronic screen transfer device, wherein both end pulleys 6 'of the upper follower roller 2 are connected as both end pulleys 6 and a belt 5 of the driving roller 1. The pulley 6 and the motor 4 of the drive roller 1 are connected to the shaft 8 which is a power transmission device.

In addition, both ends of the connecting bar 7 attached to the screen 3 in the width direction across the screen 3 are in contact with and fixed to the left and right belt 5 surfaces, respectively. Thus, the motor 4 is driven to rotate the belt 5 connected to each of the pulleys 6 and 6 'of the driving and driven rollers 1 and 2, and the connecting bar 7 is transferred. It is intended to be transported in the direction.

FIG. 1B is a cross-sectional view taken along the line A-A 'of FIG. 1A, and includes a driven roller 2, a driving roller 1, its pulleys 6 and 6', a screen 3, and a connecting bar ( 7), the screen is moved in the direction of the arrow in accordance with the driving of the motor to read the information written on the screen by the optical unit shown by the dotted line.

As described in the introduction, the rotational force of the motor 4 is transmitted to the drive roller 1 through the shaft 8, and the driven roller 2 is driven by the pulley 6 and the driven roller 2 at both ends of the drive roller 1. The rotation force is transmitted through the belt 5 on the pulley 6 'installed at both ends. At this time, both ends of the connecting bar 7 attached across the inside of the screen 3 are attached to the surface of the belt 5 so that the screen 3 is moved in the direction of the arrow together with the driving roller 1 and the driven roller 2. Play a role of In the conventional screen transfer apparatus configured as described above, the connecting bar 7 attached to the inside of the screen 3 and the surface of the belt 5 passes through the driving roller 1 and the driven roller 2, and the driven pulley 6 And 6 '), the transfer of the screen 3 becomes incomplete, and when the parallel between the driving roller 1 and the driven roller 2 is not maintained, the belt 5 is released during use.

In addition, since the connection bar 7 is attached to the screen 3 to transmit the rotational force, the distortion of the screen generated at the attachment portion cannot be avoided.

2a is a front view according to the present invention. In the present invention, the belt 5, the upper and lower pulleys 6 and 6 ', the connecting bar 7, and the like as described in FIG. 1A are not required, and the driving roller 11, the driven roller 12, It consists of the shaft 18A which transmits the rotational force of the motor 14 to the drive roller 11.

Both ends of the driving roller 11 are treated with a rubber coating part 11C having a high friction coefficient rubber such as silicone rubber, so that the friction occurs when the driving roller 11 contacts the screen 3 due to the rotation of the driving roller 11. The screen 3 is configured to be transported without slipping between the driving roller 11 and the screen 3.

In detail, Figure 2b is a partial detailed cross-sectional view of the drive roller of the present invention, for convenience, only the left side is shown, the right portion is symmetrical with the second b. On both end surfaces of the drive roller 11 which receives the shaft 18A receiving the rotational force of the motor 4 in the center, it is cut to a certain length and depth to form the rubber coating 11C, and then the drive roller ( The rubber is attached and fixed to the cutting part with the surface of 11) coinciding (horizontal) or slightly protruding.

In addition, the bush 11A is inserted into the inner diameter of the driving roller 11 such that the outer projection 11B is in close contact with the rubber coating 11C and the side ends of the driving roller 11, and at the same time the inner diameter of the bush 11A. Install through 18A).

2A and 2B, the present invention will be described together. As described above, the rotation of the shaft 18A is driven by closely attaching and installing the bush 11a between the shaft 18A and the cylindrical driving roller 11. And the rubber coating 11C attached to the surface of the driving roller 11 and the plane in the process of transferring the screen 3 while being in close contact with the surface of the driving roller 11. The friction between the screens 3 allows the screen 3 to be transported without slipping. In addition, the end of the screen 3 is in close contact with the inner surface of the projection 11B of the outer end of each bush 11A inserted between the drive roller 11 and the shaft 18A. The departure can be prevented.

Figure 2c is a detailed cross-sectional view of the left part of the driven roller of the present invention, the right part is symmetrical with the second c.

In the space between the shaft 18A and the cylindrical driven roller 12, the bush 12A is cylindrically driven roller 12 such that both end portions of the driven roller 12 and the inner surface of the protruding portion 12B of the outer side of the angular bush 12A come into close contact with each other. ) Into the Due to the projection 26 of the bush 12A in close contact with both end portions of the driven roller 12, it is possible to prevent the detachment of the screen 3 that is brought into close contact with the surface of the driven roller 12. The driven roller 12 is rotated by the screen 3 which is transported by the frictional force generated between the rubber coating 11C at both ends of the driving roller 11 and the screen 3, and passes through the driven roller 12. Both ends of the shaft 18A are fixed to the support in a state capable of free rotation due to the bearing. 3 is a front view of the drive roller 11 according to the present invention, and shows a state in which rubber coating portions 11C are formed at both ends thereof.

The present invention configured as described above can transfer the screen due to the friction between the rubber coating part and the screen provided at both ends of the driving roller without the pulley or the belt and the connecting bar, and can remove the noise during rotation due to the use of the pulley and the belt. By using the bush, it is effective to prevent the screen from falling off.

In addition, since the driving force of the motor is transmitted directly to the driving rollers and the driven rollers without passing through the pulleys and belts, the power loss and noise can be minimized. Since the curvature of the is eliminated, there is an effect that can maintain a better screen state.

Claims (2)

The pulleys 6 and 6 'at both ends of the driving and driven rollers 1 and 2 are connected as belts 5 so that the screen 3 can be conveyed, and the connecting bar 7 in its width direction is formed on the inner surface of the screen 3. And both ends are fixed to the surface of the belt 5 so that the rotational force is applied to the belt 5 connecting the pulleys 6 and 6 'between the driving and driven rollers 1 and 2 according to the driving of the motor 4. In the screen transfer apparatus for an electronic blackboard configured to transfer the screen 3 by the connecting bar 7 while being transmitted, both ends of the drive roller 11 receiving the rotational force of the motor 4 through the shaft 18A. After cutting the surface to a predetermined length and depth to form a rubber coating (11C) coated with a rubber with a high coefficient of friction, the screen (3) to be transported at both ends of the drive roller (11) and driven roller (12) The screen transfer device for electronic blackboard, characterized in that the insertion preventing bush (11A and 12A) of each inserted. According to claim 1, wherein the bushing (11a and 12a) is a hollow cylinder, the inner diameter of the drive roller 11 and the driven roller 12 is inserted, respectively, each shaft (18A and 18B) penetrates through the inner space And a protruding portion (11a and 12b) having a predetermined height at one side end thereof so as to be in close contact with an end portion of the screen (3) to be transferred to the inner side thereof.