CN108407501A - A kind of electronic blackboard with automatic erasing function - Google Patents

Abstract

The present invention provides an electronic blackboard with automatic wiping function. When wiping the blackboard, the blackboard eraser of the present invention abandons the movement trajectory of the conventional wiping method, and adopts a similar movement trajectory imitating the front windshield wiper of an automobile, which can quickly At the same time, there are magnets and electromagnets in the blackboard eraser, so that the blackboard eraser can be in close contact with the blackboard body to achieve the best wiping effect. At the end of each class, the water pump and washing pump can also be used to clean the blackboard. Wipe the blackboard body, and the wiping effect is good.

Description

An electronic blackboard with automatic wiping function

technical field

The invention belongs to the technical field of teaching tools, in particular to an electronic blackboard with automatic wiping function.

Background technique

In the traditional teaching mode, the blackboard is the main carrier for teachers to implement teaching. Teachers use chalk to write teaching content on the blackboard, and wipe the blackboard directly with a blackboard eraser after completing the explanation. On the one hand, this method will generate a lot of dust, which will float in the classroom, causing environmental pollution and affecting the health of teachers and students; on the other hand, long-term use will weaken the wiping effect and consume a lot of physical strength. Wiping during the classroom will also waste teaching time. With the development of science and technology, dust-free chalk, whiteboards, movable blackboards, and multimedia instruments have improved the classroom teaching environment, but they still cannot replace the status of blackboard teaching. Creating an environmentally friendly and energy-saving wiping blackboard has certain research value. Therefore, The invention patent with the patent number CN103231604A discloses a blackboard with an automatic dust collecting eraser, which includes a blackboard body, horizontal slide rails are arranged on the upper and lower edges of the blackboard body, between the upper and lower horizontal slide rails An eraser device is arranged between them, and the eraser device includes an electric roller brush, a floating support mechanism and a dust cover set outside the electric roller brush, and the roller brush shaft is slidably connected to the On the upper and lower horizontal slide rails, a deceleration motor is provided on the upper end of the roller brush shaft, a control handle is provided on the dust cover, and a control switch is provided in the control handle. The lower end of the dust-proof cover is also provided with a dust collection box, the lower end of the roller brush shaft is provided with a dust suction blade, and the lower end of the dust collection box is provided with a dust collection bag. This invention is an electric roller brush for erasing blackboard , has the advantages of labor-saving, time-saving and automatic dust collection, but the present invention also has many disadvantages in actual use: first, when the blackboard eraser wipes the blackboard, it not only needs to move left and right but also needs to move up and down, and the wiping speed is relatively slow; Second, the contact between the blackboard eraser and the blackboard is not close enough, and the dust collection effect is not good.

Contents of the invention

The object of the present invention is to provide an electronic blackboard with fast wiping speed, good dust collection effect and automatic wiping function.

In order to achieve the above object, the technical solution adopted by the present invention is: an electronic blackboard with automatic wiping function, including a blackboard body and a blackboard eraser, and the left and right sides of the blackboard body are respectively provided with a blackboard for fixing the blackboard body. The fixed seat on the wall, the longitudinal section of the fixed seat is an isosceles trapezoid as a whole, the bottom edge of the fixed seat is fixed on the wall, and the top edge of the fixed seat is fixedly connected with the blackboard body, so The fixed seat is pierced with a rotating shaft, and the two ends of the rotating shaft are respectively connected to the fixed seat through a bearing. It is hinged with the left flip door, and the two ends of the rotating shaft passing through the fixed seat on the right side of the blackboard body are hinged with the right flip door. The left flip door is provided with a display screen, and the right flip door is A touch screen is provided, the upper and lower sides of the blackboard body are respectively provided with slide rails, and a lead screw is arranged in the slide rails located on the lower side of the blackboard body, and the two slide rails are equipped with a slide trolley sliding on the slide rail, the slide trolley comprises an upper slide plate, a fixed plate hinged to one end of the upper slide plate and a lower plate hinged to an end of the fixed plate away from the upper slide plate, the top end of the upper slide plate and the bottom end of the lower plate are provided with sliding wheels that can slide in the slide rail, and the bottom end of the lower plate is connected to the lead screw, and the lead screw is connected to the servo motor through a coupling, Both the servo motor and the display screen are connected to the output end of the controller, the input end of the controller is connected to the touch screen, and the fixed plate is provided with a blackboard eraser on the side close to the blackboard body. A driving mechanism for wiping the blackboard body, the driving mechanism is connected with the blackboard eraser through a telescopic rod;

The bottom of the blackboard body is provided with a chute, and the bottom end of the chute is provided with a through hole I. A mounting frame that can slide in the chute is installed in the chute, and a mounting frame is installed on the mounting frame. A water pump and a washing pump, the inlets of the water pump and the washing pump are respectively connected with the water tank and the detergent adding box through connecting pipes, and the connecting pipes connected with the inlets of the water pump and the washing pump are connected through the through hole I Through, the outlets of the water pump and the washing pump are respectively connected with the blackboard eraser through connecting pipes.

Preferably, the telescopic rod includes telescopic rod I and telescopic rod II; the drive mechanism includes a drive motor mounted on the fixed plate, the output shaft of the drive motor faces the blackboard body and the drive motor A driving wheel is sleeved on the output shaft of the driving wheel, and the driving wheel meshes with the driven wheel I located directly above the driving wheel. The driven wheel I is pierced with a driven shaft I along the direction of the central axis. The driven shaft The outer peripheral surface of I is covered with a driven wheel II, the driven wheel II is located between the driving wheel and the blackboard body, and only half of the peripheral surface of the driven wheel II is provided with gears, and the driven wheel II The upper and lower sides of II are respectively provided with driven wheel III and driven wheel IV that match the driven wheel II, and the driven wheel II meshes with the driven wheel III and the driven wheel IV successively during rotation. , a driven wheel V meshing with the driven wheel IV is arranged directly under the driven wheel IV, and driven shafts II and V are respectively pierced inside the driven wheel III and the driven wheel V Driven shaft III, telescopic rod I is sleeved on the outer peripheral surface of the driven shaft II, telescopic rod II is sleeved on the outer peripheral surface of the driven shaft III, the telescopic rod I and the telescopic rod The telescopic ends of both rods II are jointly hinged on the blackboard eraser.

Preferably, the blackboard eraser includes a housing, the housing is provided with a through hole II at one end close to the blackboard body, and a water inlet hole and a detergent hole are provided at the end of the housing away from the blackboard body , the connecting pipe connected with the outlet of the water pump is connected with the water inlet hole, and the connecting pipe connected with the outlet of the washing pump is connected with the detergent hole;

A partition board is arranged in the horizontal direction in the housing, and the partition board divides the cavity inside the housing into a dust suction chamber and a dust collection chamber. magnets with opposite polarities, fans are arranged on both sides of the magnets, a dust filter plate is arranged on the side of the magnets close to the through hole II, an armature and a nozzle are arranged on the outside of the dust filter plate, the The outside of the dust filter plate and the nozzle is provided with a wiping cloth, and the casing is provided with an electromagnet on the side of the through hole II, and the armature is arranged correspondingly to the electromagnet and the armature is connected to the electromagnet. A return spring is arranged between the irons, the fan and the electromagnet are connected to the output end of the controller, the nozzle is columnar and the two sides of the nozzle are respectively provided with A water pipe and a washing pipe, the water pipe and the washing pipe communicate with the water inlet hole and the detergent hole respectively.

Preferably, an adjustment shaft is pierced through the magnet, the bottom end of the adjustment shaft is installed at the bottom of the housing, and the top end of the adjustment shaft passes through the top of the housing and is connected with an adjustment knob The facing area between the magnet and the blackboard body can be adjusted by twisting the adjusting knob, so that the adsorption force of the blackboard eraser to the blackboard body can be adjusted.

Preferably, a dust collection box is detachably provided on the outer wall of one side of the blackboard eraser, and the dust collection box communicates with the dust collection chamber.

Preferably, a counterweight is arranged in the dust collecting box.

Preferably, two cameras are arranged symmetrically on the top of the blackboard body, the two cameras are respectively connected to the input ends of the controller, and the camera ends of the two cameras are all facing the central axis of the blackboard body direction.

Preferably, there are two display screens, both of which are connected to the output terminal of the controller.

Preferably, a bulletin board is set on the top of the blackboard body, and an electronic bulletin screen connected to the output end of the controller is set on the bulletin board.

Compared with the prior art, the beneficial effects of the present invention are: when the blackboard eraser of the present invention is wiping the blackboard, the movement track of the conventional wiping method is abandoned, and the similar movement track of the front windshield wiper imitating the car can be used. Wipe the blackboard quickly. At the same time, there are magnets and electromagnets in the blackboard eraser, so that the blackboard eraser can be in close contact with the blackboard body to achieve the best wiping effect. At the end of each class, it can also be cleaned by water pump and washing The pump wipes the blackboard body, and the wiping effect is good.

Description of drawings

Fig. 1 is the overall structural representation of the present invention;

Fig. 2 is a schematic diagram of the left and right reversing doors in the open state in the present invention;

Fig. 3 is a top view of the present invention;

Fig. 4 is the structural representation of fixing seat among the present invention;

Fig. 5 is the structural representation of sliding dolly among the present invention;

Fig. 6 is the structural representation of drive mechanism among the present invention;

Fig. 7 is the structural representation of blackboard eraser among the present invention;

Marks in the figure: 1. blackboard body, 2. blackboard eraser, 201, housing, 202, through hole II, 203, water inlet hole, 204, detergent hole, 205, partition plate, 206, dust suction chamber, 207 , dust collection cavity, 208, magnet, 209, fan, 210, dust filter plate, 211, armature, 212, nozzle, 213, wiping cloth, 214, electromagnet, 215, water pipe, 216, washing pipe, 217, adjustment shaft, 218, adjustment knob, 219, return spring, 220, dust box, 221, counterweight, 3, fixed seat, 4, rotating shaft, 5, rotating shaft, 6, left reversing door, 7, right reversing door, 8, display Screen, 9, touch screen, 10, slide rail, 11, lead screw, 12, sliding car, 1201, upper slide plate, 1202, fixed plate, 1203, lower slide plate, 13, servo motor, 14, controller, 15, through hole Ⅰ, 16, chute, 17, mounting frame, 1701, water pump, 1702, washing pump, 1703, water tank, 1704, detergent adding box, 18, driving motor, 19, driving wheel, 20, driven wheel Ⅰ, 21, Driven wheel Ⅱ, 22, driven wheel Ⅲ, 23, driven wheel Ⅳ, 24, driven shaft Ⅰ, 25, driven shaft Ⅱ, 26, driven shaft Ⅲ, 27, telescopic rod Ⅰ, 28, telescopic rod Ⅱ, 29 , camera, 30, bulletin board, 31, electronic publicity screen, 32, driven wheel V.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are the Some embodiments of the invention are not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

As shown in Fig. 1 and Fig. 2, a kind of electronic blackboard with automatic wiping function comprises blackboard body 1 and blackboard eraser 2, and the left and right sides of described blackboard body 1 are respectively provided with for fixing blackboard body 1 on the wall. The fixed seat 3 on the body, as shown in Figure 4, the longitudinal section of said fixed seat 3 is an isosceles trapezoid as a whole, the bottom edge of said fixed seat 3 is fixed on the body of wall, and the top edge of said fixed seat 3 and The blackboard body 1 is fixedly connected, and the fixed seat 3 is pierced with a rotating shaft 4, and the two ends of the rotating shaft 4 are respectively connected to the fixed seat 3 through a bearing 5. The two ends of the rotating shaft 5 pierced in the fixed seat 3 on the side are hinged with the left flip door 6, and the two ends of the rotating shaft 5 pierced in the fixed seat 3 on the right side of the blackboard body 1 are connected to the right side. The reversing door 7 is hinged, the left reversing door 6 is provided with a display screen 8, the right reversing door 7 is provided with a touch screen 9, and the upper and lower sides of the blackboard body 1 are respectively provided with slide rails 10, located at the The said slide rail 10 on the lower side of the blackboard body 1 is provided with a lead screw 11, and the two slide rails 10 are equipped with a sliding trolley 12 that can slide on the two slide rails 10, as shown in Figure 5 , the sliding trolley 12 includes an upper slide plate 1201, a fixed plate 1202 hinged to one end of the upper slide plate and a lower plate 1203 hinged to an end of the fixed plate away from the upper slide plate, the top end of the upper slide plate 1201 and the lower plate The bottom ends of 1203 are all provided with sliding wheels 1204 that can slide in the slide rail 10 and the bottom ends of the lower slides 1203 are connected to the lead screw 11, and the lead screw 11 is connected to the servo motor 13 through a coupling. connected, the servo motor 13 and the display screen 8 are connected to the output end of the controller 14, the input end of the controller 14 is connected to the touch screen 9, and the fixed plate 1202 is close to the blackboard body 1 One side of the blackboard eraser is provided with a driving mechanism for driving the blackboard eraser 2 to wipe the blackboard body 1, and the driving mechanism is connected with the blackboard eraser 2 through a telescopic rod;

The bottom of the blackboard body 1 is provided with a chute 16, and the bottom end of the chute 16 is provided with a through hole I15, and a mounting bracket 17 that can slide in the chute 16 is installed in the chute 16, so that A water pump 1701 and a washing pump 1702 are installed on the mounting frame 17, and the inlets of the water pump 1701 and the washing pump 1702 are respectively connected with the water tank 1703 and the detergent adding box 1704 through connecting pipes, and connected with the water pump 1701 and the washing machine. The connecting pipe connecting the inlet of the pump 1702 passes through the through hole I 1601 , and the outlets of the water pump 1701 and the washing pump 1702 are respectively connected with the blackboard eraser 2 through connecting pipes.

To further optimize this scheme, the telescopic rod includes a telescopic rod I27 and a telescopic rod II28; as shown in FIG. Facing the blackboard body 1 and the output shaft of the driving motor 18 is covered with a driving wheel 19, the driving wheel 19 meshes with the driven wheel I20 located directly above the driving wheel 19, and the driven wheel I20 A driven shaft I24 is threaded inside along the direction of the central axis, and a driven wheel II21 is sheathed on the outer circumference of the driven shaft I24, and the driven wheel II21 is located between the driving wheel 19 and the blackboard body 1. The driven wheel II 21 is only provided with gears on half of its circumference, and the upper and lower sides of the driven wheel II 21 are respectively provided with a driven wheel III 22 and a driven wheel IV 23 that match the driven wheel II 21. The driven wheel II 21 is rotating During the process, the driven wheel III22 and the driven wheel IV23 are successively meshed, and the driven wheel V32 meshed with the driven wheel IV23 is arranged directly under the driven wheel IV23, and the driven wheel III22 and the The inside of the driven wheel V32 is respectively pierced with a driven shaft II25 and a driven shaft III26 along the direction of the central axis. A telescopic rod I27 is sleeved on the outer circumference of the driven shaft II25. A telescopic rod II 28 is sheathed on the surface, and the telescopic ends of the telescopic rod I 27 and the telescopic rod II 28 are jointly hinged on the blackboard eraser 2 .

Further optimize this solution, as shown in Figure 7, the blackboard eraser 2 includes a housing 201, and the housing 201 is provided with a through hole II 202 at one end close to the blackboard body 1, and the housing 201 is far away from the blackboard body 1. One end of the blackboard body 1 is provided with a water inlet hole 203 and a detergent hole 204, the connecting pipe connected with the outlet of the water pump 1701 is connected with the water inlet hole 203, and the connection pipe connected with the outlet of the washing pump 1702 is The connecting pipe communicates with the detergent hole 204;

The casing 201 is provided with a partition plate 205 along the horizontal direction, and the partition plate 205 divides the cavity inside the casing 201 into a dust suction cavity 206 and a dust collection cavity 207. The dust suction cavity 206 A magnet 208 opposite to the polarity of the blackboard body 1 is arranged inside, fans 209 are respectively arranged on both sides of the magnet 208, and a dust filter plate 210 is arranged on the side of the magnet 208 close to the through hole II 202, An armature 211 and a spray head 212 are provided on the outside of the dust filter plate 210, a wiping cloth 213 is provided on the outside of the dust filter plate 210 and the spray head 212, and the casing 201 is provided with a An electromagnet 214, the armature 211 and the electromagnet 214 are correspondingly arranged and a return spring 219 is arranged between the armature 211 and the electromagnet 214, and the fan 209 and the electromagnet 214 are all connected with the control The output end of the device 14 is connected, the nozzle 212 is cylindrical and the two sides of the nozzle 212 are respectively provided with a water pipe 215 and a washing pipe 216 communicating with the nozzle 212, the water pipe 215 and the washing pipe 216 communicate with the water inlet hole 203 and the detergent hole 204 respectively.

To further optimize this scheme, an adjustment shaft 217 is pierced in the magnet 208, the bottom end of the adjustment shaft 217 is installed on the bottom of the housing 201, and the top end of the adjustment shaft 217 is connected from the top of the housing 201. After passing through, it is connected with an adjustment knob 218. By twisting the adjustment knob 218, the facing area between the magnet 208 and the blackboard body 1 can be adjusted, thereby adjusting the distance between the blackboard eraser 2 and the blackboard body 1. adsorption.

To further optimize this solution, a dust collection box 220 is detachably provided on one side of the outer wall of the blackboard eraser 2 , and the dust collection box 220 communicates with the dust collection chamber 207 .

To further optimize this solution, the dust box 220 is provided with a counterweight 221. The existence of the counterweight makes the side of the blackboard eraser body on which the dust box 220 is located is always relatively lower when in use, achieving the best dust effect.

Further optimize this scheme, as shown in Figure 3, the top of described blackboard body 1 is symmetrically provided with two cameras 29, and two described cameras 29 are connected with the input end of described controller 14 respectively, and two described cameras 29 The camera ends are all facing the central axis direction of the blackboard body 1, and there are two display screens 8, and the two display screens 8 are all connected to the output end of the controller 14. Here, when the teacher writes When writing on the blackboard, the two cameras can take a panoramic video of the blackboard body and upload it to the two display screens in real time, preventing the teacher from covering the body of the blackboard when writing on the blackboard.

To further optimize this scheme, the top of the blackboard body 1 is provided with a publicity column 30, and the publicity column 30 is provided with an electronic publicity screen 31 connected to the output end of the controller 14, and some electronic publicity screens can be uploaded. Inspirational language, such as: "study hard, make progress every day", and a five-star red flag can be loaded between "study hard" and "make progress every day", so as to highly restore the existing classroom layout.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. a kind of electronic blackboard with automatic erasing function, including blackboard body and blackboard eraser, it is characterised in that：The blackboard The arranged on left and right sides of ontology is separately provided for the fixed seat for being fixed on the wall blackboard body, and the vertical of the fixed seat cuts Face is in integrally isosceles trapezoid, and the bottom edge of the fixed seat is fixed on the wall, the top margin of the fixed seat and the blackboard body It is fixedly connected, shaft is equipped in the fixed seat, the both ends of the shaft are turned by a bearing and the fixed seat respectively Dynamic connection, wherein the both ends of the shaft worn in the fixed seat on the left of the blackboard body and left overturning door hinge It connects, the both ends of the shaft worn in the fixed seat on the right side of the blackboard body and right turnover door are hinged, the left side It is provided with display screen on turnover door, touch screen is provided on the right turnover door, the upper and lower both sides of the blackboard body are set respectively It is equipped with sliding rail, leading screw is provided in the sliding rail on the downside of the blackboard body, being equipped on two sliding rails can be The sliding machine slided on two sliding rails, the sliding machine include upper slide, the fixation hinged with one end of upper slide Plate and the lower skateboard hinged with the one end of fixed plate far from the upper slide, the bottom on the top of the upper slide and the lower skateboard End is both provided with the movable pulley that can be slided in the sliding rail and the bottom end of the lower skateboard is connected with the leading screw, the leading screw It is connected with servo motor by shaft coupling, the servo motor and the display screen are connected with the output end of controller, described The input terminal of controller is connected with the touch screen, and the fixed plate is provided in the side close to the blackboard body for driving The driving mechanism that dynamic blackboard eraser wipes blackboard body, the driving mechanism are connected by telescopic rod with blackboard eraser；

The bottom of the blackboard body is provided with sliding slot, and the bottom end of the sliding slot offers through-hole I, and being equipped in the sliding slot can The mounting bracket slided in the sliding slot is equipped with water pump and washing pump, the water pump and the washing pump on the mounting bracket Entrance box added by connecting pipe and water tank and detergent be respectively connected, the entrance phase with the water pump and the washing pump Connecting pipe even is passed through out of the through-hole I, and the outlet of the water pump and the washing pump passes through connecting pipe and institute respectively Blackboard eraser is stated to be connected.

2. a kind of electronic blackboard with automatic erasing function according to claim 1, it is characterised in that：The telescopic rod Including telescopic rod I and telescopic rod II；The driving mechanism includes the driving motor being mounted in the fixed plate, the driving electricity It is arranged with driving wheel, the driving wheel and position in blackboard body and the output shaft of the driving motor described in the output shaft face of machine Driven wheel I right over the driving wheel is meshed, and driven shaft I is equipped with along central axial direction in the driven wheel I, from Driven wheel II is arranged on the outer circumference surface of moving axis I, the driven wheel II between the driving wheel and the blackboard body, The driven wheel II only has is provided with gear on the periphery of half, the upper and lower both sides of the driven wheel II be respectively arranged with Driven wheel III that the driven wheel II matches, driven wheel IV, driven wheel II during rotation successively and the driven wheel III and the driven wheel IV be meshed, the underface of the driven wheel IV is provided with the driven wheel being meshed with the driven wheel IV V, the inside of the driven wheel III and the driven wheel V is equipped with driven shaft II and driven shaft along central axial direction respectively III, telescopic rod I is arranged on the outer circumference surface of the driven shaft II, and telescopic rod is arranged on the outer circumference surface of the driven shaft III II, the telescopic end of II the two of the telescopic rod I and the telescopic rod is hinged on jointly on the blackboard eraser.

3. a kind of electronic blackboard with automatic erasing function according to claim 1, it is characterised in that：The blackboard eraser Including shell, the shell is offering through-hole II close to one end of the blackboard body, and the shell is far from the blackboard One end of ontology offers inlet opening and detergent hole, the connecting pipe being connected with the outlet of the water pump and the inlet opening It is connected, the connecting pipe being connected with the outlet of the washing pump is connected with the detergent hole；

It is horizontally disposed in the shell to have demarcation strip, the demarcation strip that the cavity of the enclosure interior is divided into dust suction Chamber and dust-collecting cavity are provided with the opposite polarity magnet with the blackboard body, the both sides point of the magnet in the vacuum chamber It is not provided with wind turbine, the magnet is being provided with dust-filtering plate, the outside setting of the dust filtration plate close to the side of the through-hole II There are armature and nozzle, wiper is provided on the outside of the dust filtration plate and the nozzle, the shell is positioned at the through-hole II Side is provided with electromagnet, and the armature and the electromagnet are correspondingly arranged and are provided between the armature and the electromagnet Resetting spring, the wind turbine are connected with the output end of the controller with the electromagnet, and the nozzle is in column type and described The both sides of nozzle are respectively arranged with the water pipe and sluicing pipe being connected with the nozzle, the water pipe and the sluicing pipe respectively with The inlet opening is connected with the detergent hole.

4. a kind of electronic blackboard with automatic erasing function according to claim 3, it is characterised in that：In the magnet It is equipped with an adjustment axis, the bottom end of the adjustment axis is mounted on the bottom of the shell, and the top of the adjustment axis is from the shell It is connected with an adjusting knob after being pierced by the top of body, the magnet and the blackboard body can be adjusted by twisting adjusting knob Between facing area, so as to adjust adsorption capacity of the blackboard eraser to the blackboard body.

5. a kind of electronic blackboard with automatic erasing function according to claim 3, it is characterised in that：The blackboard eraser Dust-collecting box is wherein removably provided on the outer wall of side, the dust-collecting box is connected with the dust-collecting cavity.

6. a kind of electronic blackboard with automatic erasing function according to claim 5, it is characterised in that：The dust-collecting box Inside it is provided with clump weight.

7. a kind of electronic blackboard with automatic erasing function according to claim 1, it is characterised in that：The blackboard sheet The top of body is symmetrical arranged there are two camera, and two cameras are connected with the input terminal of the controller respectively, two The central axial direction of blackboard body described in the camera shooting equal face in end of the camera.

8. a kind of electronic blackboard with automatic erasing function according to claim 1, it is characterised in that：The display screen There are two, two display screens are connected with the output end of the controller.

9. a kind of electronic blackboard with automatic erasing function according to claim 1, it is characterised in that：The blackboard sheet The top of body is provided with propaganda board, and the electronics publicity being connected with the output end of the controller is provided on the propaganda board Screen.