CN105856916A - Multifunctional blackboard suitable for English teaching - Google Patents

Abstract

The invention discloses a multifunctional blackboard suitable for English teaching. The multifunctional blackboard suitable for English teaching comprises a plurality of magnetic strips arranged in a blackboard and sliding rails arranged at the left and right ends of the blackboard, wherein a sliding plate with rollers is arranged in the sliding rails, a strip electromagnet is arranged on the upper side of the sliding plate; a bottom plate is arranged on the lower side of the sliding plate; furs are arranged at one end, contacted with the blackboard, of the bottom plate; baffles are arranged at the two ends of the sliding plate; the baffles, the bottom plate, the strip electromagnet and the blackboard are contacted with one another to form an iron particle accommodating cavity; a plurality of iron particles coated with white coatings on the peripheries are arranged in the iron particle accommodating cavity; a drive mechanism used for driving the sliding plate to move up and down is arranged at the upper part of the blackboard; a blackboard wiping mechanism is arranged on the sliding plate and is connected with a vibration dust collection mechanism; and a guide sleeve is arranged on a telescopic rod of the drive mechanism. According to the multifunctional blackboard suitable for English teaching, a teacher normatively draws a four-line grid and can wipe the blackboard when drawing lines, in addition, dusts can be absorbed and is very little in falling, and the device is stable in running without damaging the blackboard.

Description

It is applicable to the multi-functional blackboard of English teaching

Technical field

The present invention relates to English-teaching aid technical field, be applicable to the multi-functional black of English teaching particularly to a kind of Plate.

Background technology

At present, traditional blackboard handwriting in English is imparted knowledge to students the most in the highest flight.In carrying out basis writing training and writing and teaching, English specification writing on the blackboard Application comparison is extensive, and for normalized written, teacher needs to draw the most English four line lattice on blackboard, During frame with long ruler a line a line go draw four line lattice, also have Crinis Carbonisatus understand four line lattice devices, English three ruling chalkers, Parallel lines line assistor, the blackboard of band ruler and the teaching equipment such as English, blackboard for teaching music, although so can reach picture Go out the purpose of grid, but carry utensil at any time and lose time very much with its frame.Manual operation carries out setting-out, is drawing Cheng Zhong, due to the most uneven, it is not easy to control dynamics and balance, the lines drawn out are straight, unsightly, greatly affect teaching Quality.

Patent No. 200920011822.4 discloses a kind of health blackboard, including rectangular slab face and base, plate face Ledge for chalk on blackboard, described ledge for chalk on blackboard is inverted triangle structure, and offers opening at low side, and opening part installs refuse receptacle;Along base, plate face Being laterally inward and offer multiple slot, slot diameter is equal to the maximum gauge of chalk.During use, user assigns into chalk chalk In groove, use offer convenient for teachers and students;The ledge for chalk on blackboard on base, plate face can be collected teachers and students and write, in plate face, the powder that letter written with chalk is dropped Pen ash, and these chalk dusts are snapped down to opening part along the ledge for chalk on blackboard of inverted triangle, and finally fall in refuse receptacle, user is only Need periodically refuse receptacle to be cleared up just may be used.And for example disclosed in 201120009275.3, a kind of both sides rotate health blackboard, including Plate face, the most inwardly offers slot on base, plate face, assigns drawer at slot, opens along drawer inner surface long limit symmetry If two slideway, cleaning brush is installed at slideway;On limit, the left and right sides, plate face, folding connects other plate face respectively.But it all depends on So there is problems in that 1, writing on blackboard cloth is carried out by washing liquid, and blackboard cloth need to be totally immersed in washing liquid, cleans Later blackboard cloth is wetted, and needs could continue to write every a period of time after blackboard cloth is dry, is unsuitable for writing classroom frequently； 2, washing liquid can not the writing on erasing blackboard cloth completely, make troubles to writing next time；3, blackboard cloth is unsettled setting, at book When writing, blackboard cloth pressurized inwardly concaves, and writes inconvenience.Above-mentioned of the prior art all there is problems with, blackboard is in the mistake wiped What in journey, dust descended slowly and lightly is ubiquitous, and teacher and student's Long-term absorption chalk powder, majority is delayed in alveolar, through a series of Stimulation, chemistry and immunity effect pulmonary just can be caused lose, including inflammation in respiratory system and pulmonary ventilation function decline, cause Chronic, acute pneumonia, pulmonary carcinoma, pneumoconiosis etc. (i.e. containing silicon dioxide in chalk dust, are inhaled into pulmonary, dissociate in pulmonary Dioxide-containing silica is at the dust of one of percentage pulmonary fibrosis formed above, so that alveolar fibrosis, causes pulmonary's work of breathing Can decline).Secondly chalk dust enters the approach of lung is to include nose, pharynx, bronchus by upper respiratory tract, in this course, Part dust can stay in upper respiratory tract, and mucomembranous epithelial cell is produced mechanical stimulus and damage, work the most in such a case Making, can cause a series of pathological changes, wherein the impact on nose is most commonly that induction rhinitis sicca, next to that hypertrophica nose Inflammation, symptom is dry nasal cavity, nasal obstruction, nasal membrane hyperemia, secretions increase etc.；Impact on pharynx mainly induces chronic pharynx Inflammation, makes pharyngeal being dried, not well, pharyngalgia itching throat of coughing up phlegm；Bronchial impact is mainly induced chronic bronchitis, the most also can Cause asthma, additionally it is also possible to cause the canceration of the part such as nasopharynx, bronchus.Eyes are the most accurate in human organ, the easiest One of impaired organ, the Main Ingredients and Appearance calcium carbonate of chalk dust, calcium oxide etc. are a kind of water-soluble substanceses, are easily dissolved in Water, and produce alkaline matter, if teacher is in teaching process, chalk dust falls in eye, stimulates lacrimal secretion, tear hydrolysis carbon Acid calcium and produce alkaline matter, will seriously stimulate eye mucous membranes, cause mucosa injury, form chronic inflammatory disease, it is also possible to induction The generation of myopia.Teacher is in teaching process, and chalk dust inevitably sticks on hand, floats in air simultaneously Granule dust also can fall at teacher student's hair, on the face with on neck, and skin membrane is had stimulation, if meeting sweat hot summer days Solve, produce alkaline matter, bigger to Mucocutaneous stimulation, because the environment that human body skin is survived is weak acid environment, So destroying the basic living environment of skin under dust alkalescence effect, chalk dust makes skin become to be dried, coarse, and accompanies Scratching where it itches sensation, make human body uncomfortable, severe patient can cause acne, folliculitis, pyoderma, chapped skin and a large amount of alopecia, Affect and disturb teacher and normally work and live.Chalk dust enters external auditory meatus, is mixed in sebum, can form impacted cerumen, If such for a long time, the generation of ear inflammation can be caused.Among the composition of induction Other diseases current market chalk, except containing metal Element, lead manganese, outside barium equal size is on the low side, the content of cadmium metal is higher, and after cadmium is sucked by human body, major storage is in liver, kidney, bone group In knitting, obvious to these histologic lesions, the major lesions that Long Term Contact cadmium compound causes is emphysema and kidney damage, and the state of an illness can Developing in Progressive symmetric erythrokeratodermia, Early manifestation is unable, thin, dizzy, insomnia and dreamful sleep, loss of appetite and neurasthenia symptom, and has nose to go out The phenomenons such as blood, chronic pharyngitis, Atrophic nasal mucosas and ulcer.Emphysema are slowly in progress, and patient has Progressive symmetric erythrokeratodermia dyspnea, and activity adds Weight, with cardiopalmus.Cadmium is also simultaneously one of metallic element being easily caused cancer most.The chalk dust that affects of air quality is had There are stronger absorbability, a lot of harmful levels of pathogens can adsorb on fine dust and are brought into student pulmonary, thus facilitate urgency Property and the generation of chronic inflammatory disease, thus cause student group group contagion respiratory tract and other epidemic diseases.Student is in the process of listening to the teacher In, the sanitary index such as indoor and total number of bacteria runs down, and can interact with fine chalk dust, and aggravation chalk dust is to teacher Raw healthy harm.

Summary of the invention

In view of this, it is an object of the invention to for the deficiencies in the prior art, it is provided that a kind of to be applicable to English teaching many Function blackboard, teacher can carry out setting-out at a distance, draws four line lattice specifications, while setting-out can blackboard wiping, and dust Can absorb, dust descends slowly and lightly seldom, and plant running stably will not damage blackboard.

For reaching above-mentioned purpose, the present invention by the following technical solutions: a kind of multi-functional blackboard being applicable to English teaching, Including arranging in several magnet strips being arranged in blackboard and the slide rail being arranged on two ends, blackboard left and right, described slide rail, there is rolling The slide plate of wheel, is provided with bare electromagnet, is provided with base plate on the downside of described slide plate on the upside of described slide plate, described base plate contacts with blackboard One end is provided with fur, and described slide plate two ends are provided with baffle plate, and described baffle plate, base plate, bare electromagnet form ferrum after contacting with blackboard Granule accommodates chamber, and ferrum granule receiving intracavity is provided with several peripheries and scribbles the ferrum granule of white coating, and described blackboard top is provided with Arranging blackboard-cleaning mechanism in the drive mechanism driving slide plate to move up and down, described slide plate, described blackboard-cleaning mechanism is even Meeting vibration dust-collection mechanism, the expansion link of described drive mechanism is provided with fairlead.

Further, described drive mechanism includes the electric expansion bar being arranged on blackboard top, described electric expansion bar Free end is connected with slide plate.

Further, described blackboard-cleaning mechanism includes being arranged on slide plate top electromagnetism push rod and being positioned at electromagnetism push rod freely The blackboard brush of end, is provided with several guiding mechanisms between described blackboard brush and slide plate.

Further, described guiding mechanism includes the guide cylinder being arranged on slide plate and is arranged on blackboard brush and stretches into guiding The guide post of cylinder.

Further, described vibration dust-collection mechanism includes the vibrating motor being arranged on blackboard brush, described slide plate, bar shaped electricity Magnet, the baffle plate of slide plate both sides constitute storage ash chamber, and described slide plate is provided with and stores up the air exhauster that ash chamber connects, described air exhauster Air outlet suit is for collecting the dust settling pocket of dust.

Further, electric push rod, vibrating motor, air exhauster are all connected with Programmable Logic Controller.

Further, described slide plate is provided with emergency light.

Further, described Programmable Logic Controller connects wireless controller.

Further, the suction after described ferrum granule is adsorbed is more than the bent radial power of fur, and ferrum granule is placed on ferrum After grain accommodates chamber, the bent radial power of fur is more than the ferrum granule pressure to fur.

Further, described slide plate two ends are respectively provided with at least two roller.

Further, described base plate is provided with sloping baffle.

Further, described fur uses abrasive rubber to make, and abrasive rubber is made up of the raw material of following weight portion, neoprene Rubber 50～70 parts, butadiene-styrene rubber 20～25 parts, magnesium oxide 6～8 parts, white carbon black 8～10 parts, paraffin 7～11 parts, stearic acid 3～6 Part, m-xylene diamine 6～8 parts.

The control method of a kind of multi-functional blackboard being applicable to English teaching, comprises the following steps:

1) the ferrum granule scribbling white coating being placed on ferrum granule and accommodates chamber, Controlled by Programmable Controller electromagnetism push rod works, Blackboard brush is pressed on blackboard, now the work of Controlled by Programmable Controller electric push rod, drives slide plate and blackboard brush upwards to move Dynamic, blackboard brush is clean by blackboard-cleaning, when ferrum granule runs into the magnet strip in blackboard, magnet strip by ferrum ferrum granular absorption black Plate surface, electric push rod continues to drive slide plate and blackboard brush to move up, owing to the suction after ferrum granule is adsorbed is more than soft The bent radial power of hair, fur is after moving up, it is impossible to being brushed off by the ferrum granule on blackboard, blackboard eraser moves to blackboard top After, disconnecting electric push rod power supply by Programmable Logic Controller, 4 magnet strip absorption ferrum granules in blackboard form four standards Four line lattice；

2) when need not four line lattice, Controlled by Programmable Controller electromagnetism push rod works, and is pressed on blackboard by blackboard brush, able to programme Controller controls bare electromagnet energising, the then work of Controlled by Programmable Controller electric push rod, drives slide plate and blackboard brush Moving down, fur first contacts with ferrum granule, and the suction after being adsorbed due to ferrum granule is more than the bent radial power of fur, fur After moving down, it is impossible to the ferrum granule on blackboard is brushed off, after bare electromagnet contacts with ferrum granule, the magnetic of bare electromagnet Ferrum granule on blackboard, more than the magnetic force of blackboard internal magnet bar, is attracted to bare electromagnet, when the ferrum granule on blackboard by power After all being adsorbed by bare electromagnet, Controlled by Programmable Controller bare electromagnet deenergization, ferrum granule falls and holds at ferrum granule Receive intracavity, it is simple to next time draws four line lattice and uses, and blackboard eraser is clean by blackboard-cleaning during moving down；

3) after blackboard eraser moves to bottom, electric push rod power supply, Programmable Logic Controller control are disconnected by Programmable Logic Controller Electromagnetism push rod deenergization processed, blackboard eraser is retracted and makes blackboard brush not contact with blackboard by the spring in electromagnetism push rod, programmable control Device processed controls vibrating motor work, is shaken off by the dust on blackboard brush in storage ash intracavity, Controlled by Programmable Controller air exhauster work Make the ash of storage ash intracavity is transported to dust settling pocket.

Compared with prior art, the invention has the beneficial effects as follows: the slide plate of the present invention uses high intensity Q420 steel steel plate, electricity Magnetic push rod connects has slide rheostat can control the thrust of electromagnetism push rod, and the thrust of electromagnetism push rod is not more than the deformation power of steel plate, It is thus possible to the deformation of anti-limited slip plate, just face slide plate is big with blackboard contact gap, and ferrum granule spills or bare electromagnet can not be by ferrum Granule scrapes；The ferrum granule scribbling white coating is placed on ferrum granule and accommodates chamber, Controlled by Programmable Controller electromagnetism push rod work Making, be pressed on blackboard by blackboard brush, now the work of Controlled by Programmable Controller electric push rod, now bare electromagnet is obstructed Electricity, drives slide plate and blackboard brush to move up, and blackboard brush is clean by blackboard-cleaning, when ferrum granule runs into the magnet strip in blackboard Time, magnet strip is by ferrum ferrum granular absorption on blackboard surface, and electric push rod continues to drive slide plate and blackboard brush to move up, due to Suction after ferrum granule is adsorbed is more than the bent radial power of fur, and fur is after moving up, it is impossible to by the ferrum on blackboard Grain brushes off, and after blackboard eraser moves to blackboard top, disconnects electric push rod power supply, 4 in blackboard by Programmable Logic Controller Magnet strip absorption ferrum granule forms four line lattice of four standards；When need not four line lattice, Controlled by Programmable Controller electromagnetism pushes away Bar works, and is pressed on blackboard by blackboard brush, then the work of Controlled by Programmable Controller electric push rod, drives slide plate and blackboard brush Moving down, fur first contacts with ferrum granule, and the suction after being adsorbed due to ferrum granule is more than the bent radial power of fur, fur After moving down, it is impossible to the ferrum granule on blackboard is brushed off, after bare electromagnet contacts with ferrum granule, the magnetic of bare electromagnet Ferrum granule on blackboard, more than the magnetic force of blackboard internal magnet bar, is attracted to bare electromagnet, when the ferrum granule on blackboard by power After all being adsorbed by bare electromagnet, Controlled by Programmable Controller bare electromagnet deenergization, ferrum granule falls and holds at ferrum granule Receive intracavity, it is simple to drawing next time and use, blackboard eraser is clean by blackboard-cleaning during moving down；Treat that blackboard eraser moves to down Behind portion, disconnect electric push rod power supply, Controlled by Programmable Controller electromagnetism push rod deenergization, electromagnetism by Programmable Logic Controller Blackboard eraser is retracted and makes blackboard brush not contact with blackboard by the spring in push rod, and Controlled by Programmable Controller vibrating motor works, will Dust on blackboard brush shakes off at storage ash intracavity, and the ash of storage ash intracavity is transported to remove by the work of Controlled by Programmable Controller air exhauster Dirt bag.

Accompanying drawing explanation

The present invention is further detailed explanation with detailed description of the invention below in conjunction with the accompanying drawings:

Fig. 1 is the main TV structure schematic diagram of the present invention；

Fig. 2 is the sectional structure schematic diagram of the present invention；

Fig. 3 is the structure for amplifying schematic diagram in Fig. 2 at A；

Fig. 4 is the attachment structure schematic diagram of blackboard brush and slide plate；

Fig. 5 is the guiding mechanism structural representation of the present invention；

Fig. 6 is the skateboard schematic diagram of the present invention.

Detailed description of the invention

Embodiment 1: as shown in Fig. 1,2,3,4,5, a kind of multi-functional blackboard being applicable to English teaching is black including being arranged on Several magnet strips 9 in plate and the slide rail 1 being arranged on blackboard about 3 two ends, arrange the slide plate with roller 2 in described slide rail 7, it is provided with bare electromagnet on the upside of described slide plate 7, on the downside of described slide plate 7, is provided with base plate 24, described base plate 24 contacts with blackboard One end is provided with fur 25, and described slide plate 7 two ends are provided with baffle plate, after described baffle plate, base plate 24, bare electromagnet 18 contact with blackboard Forming ferrum granule and accommodate chamber 19, ferrum granule receiving intracavity is provided with several peripheries and scribbles the ferrum granule 20 of white coating, described black Plate top is provided with the drive mechanism for driving slide plate to move up and down, and described slide plate arranges blackboard-cleaning mechanism, described blackboard Wiping mechanism connects vibration dust-collection mechanism, and the expansion link 6 of described drive mechanism is provided with fairlead 5.

Described drive mechanism includes the electric expansion bar 4 being arranged on blackboard top, the free end of described electric expansion bar with Slide plate 7 connects.

Described blackboard-cleaning mechanism includes being arranged on slide plate top electromagnetism push rod 14 and being positioned at the black of electromagnetism push rod free end Scrubbing brush 12, is provided with several guiding mechanisms 8 between described blackboard brush 12 and slide plate 7.

Described guiding mechanism 8 includes that the guide cylinder 23 being arranged on slide plate 8 stretches into guide cylinder with being arranged on blackboard brush Guide post 22.Play the effect of righting-oriented blackboard brush, prevent blackboard brush from tilting, thus ensure that blackboard brush wiping is stable.

Programmable Logic Controller connects wireless controller, it is simple to distant control.

Described vibration dust-collection mechanism includes the vibrating motor 11 being arranged on blackboard brush, described slide plate 7, bare electromagnet 18, the baffle plate of slide plate both sides constitutes storage ash chamber 13, and described slide plate is provided with and stores up the air exhauster 16 that ash chamber connects, described air exhauster The air outlet suit of 16 is for collecting the dust settling pocket 17 of dust.

Electric push rod, vibrating motor, air exhauster are all connected with Programmable Logic Controller, can long distance by Programmable Logic Controller From operation.

Described slide plate two ends are respectively provided with two rollers.

Described magnet strip surface is 1mm with the distance on blackboard surface.

Described bare electromagnet is 1mm with the distance on blackboard surface.

Described slide plate is provided with emergency light 10, is easy to illumination after power failure, and described emergency light is arranged on slide plate Centre, good illumination effect.

Described base plate 24 is provided with sloping baffle 21, it is simple to ferrum granule contacts with blackboard.

Described bare electromagnet connects slide rheostat, it is simple to the magnetic force of regulation bare electromagnet, it is simple to by blackboard table The ferrum granular absorption in face, the length of described bare electromagnet is identical with the magnet strip length in blackboard, and bare electromagnet is with black Magnet strip in plate is corresponding, it is possible to completely by the ferrum granular absorption on blackboard, uses bare electromagnet not connect with blackboard surface Touch, blackboard will not be damaged.

The control method of a kind of multi-functional blackboard being applicable to English teaching, comprises the following steps:

1) the ferrum granule scribbling white coating being placed on ferrum granule and accommodates chamber, Controlled by Programmable Controller electromagnetism push rod works, Blackboard brush is pressed on blackboard, now the work of Controlled by Programmable Controller electric push rod, drives slide plate and blackboard brush upwards to move Dynamic, blackboard brush is clean by blackboard-cleaning, when ferrum granule runs into the magnet strip in blackboard, magnet strip by ferrum ferrum granular absorption black Plate surface, electric push rod continues to drive slide plate and blackboard brush to move up, owing to the suction after ferrum granule is adsorbed is more than soft The bent radial power of hair, fur is after moving up, it is impossible to being brushed off by the ferrum granule on blackboard, blackboard eraser moves to blackboard top After, disconnecting electric push rod power supply by Programmable Logic Controller, 4 magnet strip absorption ferrum granules in blackboard form four standards Four line lattice；

2) when need not four line lattice, Controlled by Programmable Controller electromagnetism push rod works, and is pressed on blackboard by blackboard brush, then may be used Programmable controller controls electric push rod work, drives slide plate and blackboard brush to move down, and fur first contacts with ferrum granule, due to Suction after ferrum granule is adsorbed is more than the bent radial power of fur, and fur is after moving down, it is impossible to by the ferrum on blackboard Grain brushes off, and after bare electromagnet contacts with ferrum granule, the magnetic force of bare electromagnet is more than the magnetic force of blackboard internal magnet bar, by blackboard On ferrum granule be attracted to bare electromagnet, after the ferrum granule on blackboard is all adsorbed by bare electromagnet, programmable control Device processed controls bare electromagnet deenergization, and ferrum granule falls and accommodates intracavity at ferrum granule, it is simple to next time draws four line lattice and uses, black Blackboard eraser is clean by blackboard-cleaning during moving down；

3) after blackboard eraser moves to bottom, electric push rod power supply, Programmable Logic Controller control are disconnected by Programmable Logic Controller Electromagnetism push rod deenergization processed, blackboard eraser is retracted and makes blackboard brush not contact with blackboard by the spring in electromagnetism push rod, programmable control Device processed controls vibrating motor work, is shaken off by the dust on blackboard brush in storage ash intracavity, Controlled by Programmable Controller air exhauster work Make the ash of storage ash intracavity is transported to dust settling pocket.

Embodiment 2 is with the difference of embodiment 1: the suction after described ferrum granule 20 is adsorbed is more than the radial direction of fur 25 Folding force, after ferrum granule is placed on ferrum granule receiving chamber, the bent radial power of fur 25 is more than the ferrum granule pressure to fur 25.

Described fur uses abrasive rubber to make, and abrasive rubber is made up of the raw material of following weight portion, neoprene 50 parts, 20 parts of butadiene-styrene rubber, magnesium oxide 6 parts, white carbon black 8 parts, 7 parts of paraffin, stearic acid 3 parts, m-xylene diamine 6 parts.

Embodiment 3 is with the difference of embodiment 1: described fur uses abrasive rubber to make, and abrasive rubber is by following heavy The raw material composition of amount part, neoprene 70 parts, 25 parts of butadiene-styrene rubber, magnesium oxide 8 parts, white carbon black 10 parts, 11 parts of paraffin, stearic acid 6 Part, m-xylene diamine 8 parts.

Embodiment 4 is with the difference of embodiment 1: described fur uses abrasive rubber to make, and abrasive rubber is by following heavy The raw material composition of amount part, neoprene 60 parts, 23 parts of butadiene-styrene rubber, magnesium oxide 7 parts, white carbon black 9 parts, 10 parts of paraffin, stearic acid 4.5 Part, m-xylene diamine 7 parts.

Embodiment 2,3,4 uses the Special wear-resistant rubber fur of the present invention, fur diameter 2mm length 5mm, its pliability Good and wear-resisting, pliability and anti-wear performance complement each other, and have reached good state, and on the one hand abrasive rubber fur can be prevented Only ferrum particles fall, on the other hand during the work of rubber fur, silicone oil is oozed out on surface, helps frictional contact surface lubrication, thus extends rubber In the service life of glue fur, what is more important will not be worn and torn blackboard.Through invention test, the abrasive rubber of the present invention is used to make It is 3 times of prior art with the life-span, and uses after 6 months, use the rubber fur of the present invention a little the most not wear and tear blackboard, and Rubber fur is also without damaging, and uses the fur of prior art substantially to wear and tear, and blackboard scratch is serious, what is more important Grain drops many, uses after half a year, cavity can ferrum granule can drop half, use the rubber fur ferrum granule of the present invention substantially without Drop.

Finally illustrating, above example is only in order to illustrate technical scheme and unrestricted, and this area is common Other amendment or equivalents that technical scheme is made by technical staff, without departing from technical solution of the present invention Spirit and scope, all should contain in the middle of scope of the presently claimed invention.

Claims (10)

1. the multi-functional blackboard being applicable to English teaching, it is characterised in that: include several Magnet being arranged in blackboard In bar and the slide rail being arranged on two ends, blackboard left and right, described slide rail, the slide plate with roller is set, on the upside of described slide plate, is provided with bar Shape electric magnet, is provided with base plate on the downside of described slide plate, one end that described base plate contacts with blackboard is provided with fur, and described slide plate two ends set Forming ferrum granule after having baffle plate, described baffle plate, base plate, bare electromagnet to contact with blackboard and accommodate chamber, ferrum granule accommodates intracavity and sets Having several peripheries to scribble the ferrum granule of white coating, described blackboard top is provided with the driving machine for driving slide plate to move up and down Structure, described slide plate arranges blackboard-cleaning mechanism, and described blackboard-cleaning mechanism connects vibration dust-collection mechanism, described drive mechanism Expansion link is provided with fairlead.

It is applicable to the multi-functional blackboard of English teaching the most as claimed in claim 1, it is characterised in that: described drive mechanism includes Being arranged on the electric expansion bar on blackboard top, the free end of described electric expansion bar is connected with slide plate.

It is applicable to the multi-functional blackboard of English teaching the most as claimed in claim 1, it is characterised in that: described blackboard-cleaning mechanism Including being arranged on slide plate top electromagnetism push rod and being positioned at the blackboard brush of electromagnetism push rod free end, it is provided with between described blackboard brush and slide plate Several guiding mechanisms.

It is applicable to the multi-functional blackboard of English teaching the most as claimed in claim 1, it is characterised in that: described vibration dust-collection mechanism Including the vibrating motor being arranged on blackboard brush, described slide plate, bare electromagnet, the baffle plate of slide plate both sides constitute storage ash chamber, institute Stating slide plate be provided with and store up the air exhauster that ash chamber connects, the air outlet suit of described air exhauster is for collecting the dust settling pocket of dust.

It is applicable to the multi-functional blackboard of English teaching the most as claimed in claim 4, it is characterised in that: electric push rod, vibration Motor, air exhauster are all connected with Programmable Logic Controller.

It is applicable to the multi-functional blackboard of English teaching the most as claimed in claim 5, it is characterised in that: described slide plate is provided with should Anxious illuminating lamp.

It is applicable to the multi-functional blackboard of English teaching the most as claimed in claim 5, it is characterised in that: described Programmable Logic Controller Connect and have wireless controller.

It is applicable to the multi-functional blackboard of English teaching the most as claimed in claim 1, it is characterised in that: described base plate is provided with and inclines Slanting baffle, it is simple to ferrum granule contacts with blackboard.

It is applicable to the multi-functional blackboard of English teaching the most as claimed in claim 1, it is characterised in that: described fur uses wear-resisting Rubber is made, and abrasive rubber is made up of the raw material of following weight portion, neoprene 50～70 parts, butadiene-styrene rubber 20～25 parts, oxygen Change magnesium 6～8 parts, white carbon black 8～10 parts, paraffin 7～11 parts, stearic acid 3～6 parts, m-xylene diamine 6～8 parts.

10. a control method for the multi-functional blackboard being applicable to English teaching as described in any one of claim 1-9, it is special Levy and be: comprise the following steps:

1) the ferrum granule scribbling white coating being placed on ferrum granule and accommodates chamber, Controlled by Programmable Controller electromagnetism push rod works, Blackboard brush is pressed on blackboard, now the work of Controlled by Programmable Controller electric push rod, drives slide plate and blackboard brush upwards to move Dynamic, blackboard brush is clean by blackboard-cleaning, when ferrum granule runs into the magnet strip in blackboard, magnet strip by ferrum ferrum granular absorption black Plate surface, electric push rod continues to drive slide plate and blackboard brush to move up, owing to the suction after ferrum granule is adsorbed is more than soft The bent radial power of hair, fur is after moving up, it is impossible to being brushed off by the ferrum granule on blackboard, blackboard eraser moves to blackboard top After, disconnecting electric push rod power supply by Programmable Logic Controller, 4 magnet strip absorption ferrum granules in blackboard form four standards Four line lattice；

2) when need not four line lattice, Controlled by Programmable Controller electromagnetism push rod works, and is pressed on blackboard by blackboard brush, able to programme Controller controls bare electromagnet energising, the then work of Controlled by Programmable Controller electric push rod, drives slide plate and blackboard brush Moving down, fur first contacts with ferrum granule, and the suction after being adsorbed due to ferrum granule is more than the bent radial power of fur, fur After moving down, it is impossible to the ferrum granule on blackboard is brushed off, after bare electromagnet contacts with ferrum granule, the magnetic of bare electromagnet Ferrum granule on blackboard, more than the magnetic force of blackboard internal magnet bar, is attracted to bare electromagnet, when the ferrum granule on blackboard by power After all being adsorbed by bare electromagnet, Controlled by Programmable Controller bare electromagnet deenergization, ferrum granule falls and holds at ferrum granule Receive intracavity, it is simple to next time draws four line lattice and uses, and blackboard eraser is clean by blackboard-cleaning during moving down；

3) after blackboard eraser moves to bottom, electric push rod power supply, Programmable Logic Controller control are disconnected by Programmable Logic Controller Electromagnetism push rod deenergization processed, blackboard eraser is retracted and makes blackboard brush not contact with blackboard by the spring in electromagnetism push rod, programmable control Device processed controls vibrating motor work, is shaken off by the dust on blackboard brush in storage ash intracavity, Controlled by Programmable Controller air exhauster work Make the ash of storage ash intracavity is transported to dust settling pocket.