CN107458121A

CN107458121A - A kind of stable English teaching system for being advantageous to teachers and students' health

Info

Publication number: CN107458121A
Application number: CN201710647516.9A
Authority: CN
Inventors: 陈晓霞
Original assignee: Nanyang Institute of Technology
Current assignee: Nanyang Institute of Technology
Priority date: 2016-04-25
Filing date: 2016-04-25
Publication date: 2017-12-12
Anticipated expiration: 2036-04-25
Also published as: CN105691065A; CN107471876B; CN107458121B; CN107471876A; CN105691065B

Abstract

The invention discloses a kind of stable English teaching system for being advantageous to teachers and students' health, including several magnet strips being arranged in blackboard and the slide rail for being arranged on blackboard left and right ends, slide plate with roller is set in the slide rail, scraper plate is provided with the upside of the slide plate, bottom plate is provided with the downside of the slide plate, one end that the bottom plate contacts with blackboard is provided with fur, the slide plate both ends are provided with baffle plate, the baffle plate, bottom plate, scraper plate forms iron particle accommodating chamber after being contacted with blackboard, the iron particle of white coating is scribbled in iron particle accommodating chamber provided with several peripheries, the blackboard top, which is provided with, to be used to drive the drive mechanism that slide plate moves up and down, blackboard-cleaning mechanism on the slide plate, the blackboard-cleaning mechanism connection vibration dust-collection mechanism, the vibration dust-collection mechanism is provided with dust non-proliferation mechanism.Teacher can carry out setting-out at a distance, draw four line lattice specifications, while setting-out can blackboard wiping, and dust can absorb, and dust descends slowly and lightly seldom, and plant running will not stably damage blackboard.

Description

A kind of stable English teaching system for being advantageous to teachers and students' health

Technical field

The present invention relates to English-teaching aid technical field, more particularly to a kind of stable English for being advantageous to teachers and students' health Language tutoring system.

Background technology

At present, traditional blackboard handwriting in English is imparted knowledge to students still in the highest flight.In basic writing training and writing and teaching is carried out, The specification writing on the blackboard of English is applied than wide, and for normalized written, teacher needs to draw corresponding English four line lattice on blackboard, Remove to draw four line lattice with long ruler a line a line during frame, also someone invented four line lattice devices, English three ruling chalkers, The teaching equipment such as parallel lines line assistor, the blackboard with ruler and English, blackboard for teaching music, although can so reach picture Go out the purpose of grid, but carry utensil at any time and lost time very much with its frame.

The ruling drawing tool of English teaching four of the prior art, a kind of teaching is black as disclosed in CN201320144764.9 Plate also includes longitudinal coordinate chi, two sliding blocks and two guide rails, and one is respectively provided with along its length on the upper and lower side of blackboard main body Individual guide rail, a sliding block is set with each guide rail, longitudinal coordinate chi is slidably connected by two sliding blocks and two guide rails, longitudinal direction At least four through holes are uniformly machined with coordinatometer along its length, each through hole of coordinatometer, which is machined with to fix with chalk, to be led to The orthogonal fixing hole in hole, a steady pin is provided with each fixing hole, steady pin is threadedly coupled with fixing hole.It is not Foot part is：Such a blackboard eraser needs people's gripping sliding block to enter line slip, and people is relatively painstaking in drawing process, and automaticity is not Height, need left hand that equipment is pressed against on blackboard during use, right hand sliding skateboard, because teaching equipment volume is big, during operating cost Arduously, the lines of picture are inconsistent, unintelligible；What is more important, manually operated carry out setting-out, in drawing process, due to Power is uneven, it is not easy to which control dynamics and balance, the lines drawn out are not straight, unsightly, greatly influence quality of instruction.

The Chinese invention patent that and for example number of patent application is 201020655323.1 discloses a kind of simple blackboard eraser, including The slide rail of blackboard upper and lower ends is arranged on, is provided with roller in slide rail, swipe is connected with the roller being arranged on slide rail, the bottom of swipe Face is provided with bristle, and the back side of swipe is provided with handle.The length of the swipe is suitable with the width of blackboard, grips the handle edge in swipe Blackboard slip swipe can be wiped.This blackboard eraser solves the problems, such as to wipe monoblock blackboard difficulty, simultaneously erased speed Degree also increases.But the handle that such a blackboard eraser needs people to grip in swipe swipes, people is relatively painstaking during handle is pulled, Automaticity is not high.

CN202448577U discloses a kind of hygienic blackboard, including support, washing trough and motor, motor Output shaft connection rotating shaft one, belt wheel one is installed in rotating shaft one, and one end of rotating shaft one through support and is extend into washing trough, rotating shaft one It is rotatablely connected with support and washing trough, the top of rotating shaft one sets rotating shaft two, and one end of rotating shaft two passes support and connection belt wheel two, Belt wheel one and belt wheel two are connected by transmission belt one, and belt wheel three and belt wheel four are set in rotating shaft two, and the top of rotating shaft two, which is set, to be turned Axle three, belt wheel five and belt wheel six, belt wheel three and belt wheel five is set to be connected by transmission belt two in rotating shaft three, belt wheel four and belt wheel six Connected by transmission belt three, blackboard cloth is installed on transmission belt two and transmission belt three, the bottom of blackboard cloth is extend into washing trough, washing trough Cell body including being loaded with washing lotion, rotating shaft one extend into the installation of the part in washing trough hairbrush.The hygienic blackboard is simple in construction, Using will not threaten to the health of people, more hygienic.But still there is problems with it：1st, the writing on blackboard cloth Cleaned by washing lotion, blackboard cloth need to be totally immersed in washing lotion, and blackboard cloth is wetted, it is necessary to every a period of time after cleaning It could continue to write after blackboard cloth is dry, be unsuitable for writing frequently classroom；2nd, the word that washing lotion can not completely on erasing blackboard cloth Mark, made troubles to writing next time；3rd, blackboard cloth is vacantly set, and in writing, blackboard cloth, which is pressurized, inwardly concaves, and writing is not It is convenient.It is above-mentioned it is of the prior art problems be present, blackboard dust during wiping descends slowly and lightly ubiquitous, Jiao Shiji Student's Long-term absorption chalk powder, majority are delayed in alveolar, and by a series of stimulation, chemistry and immune effect can make Lost into lung, including inflammation in respiratory system and pulmonary ventilation function decline, and cause chronic, acute pneumonia, lung cancer, pneumoconiosis etc. （Contain silica in chalk dust, be inhaled into lung, in the free dioxide-containing silica of lung shape more than 1 percent Into the dust of pulmonary fibrosis, so that alveolar fibrosis, causes lung's respiratory function to decline）.Secondly chalk dust enters lung Approach is to include nose, pharynx, bronchus by the upper respiratory tract, and in this course, part dust can stay in the upper respiratory tract, to viscous Film epithelial cell produces mechanical stimulus and damage, works in such a case for a long time, can cause a series of lesion, wherein to nose Influence most commonly induce rhinitis sicca, next to that hypertrophic rhinitis, symptom is mycteroxerosis, nasal obstruction, nasal membrane Congested, secretion increases；Influence to pharynx mainly induces chronic pharyngitis, makes pharyngeal drying, and not well, pharyngalgia pharynx of coughing up phlegm is itched； Chronic bronchitis is mainly induced on bronchial influence, can also trigger asthma sometimes, in addition it is also possible to causing nasopharynx, branch The canceration of the parts such as tracheae.Eyes are one of organs most accurate, most easily damaged in human organ, the Main Ingredients and Appearance of chalk dust Calcium carbonate, calcium oxide etc. are a kind of water-soluble substanceses, are dissolved easily in water, and produce alkaline matter, if teacher is in teaching process In, chalk dust is fallen into eye, stimulates lacrimal secretion, and tears hydrolyze calcium carbonate and produce alkaline matter, will seriously stimulate eye Portion's mucous membrane, mucosa injury is caused, form chronic inflammation, it is also possible to induce the generation of myopia.Teacher is in teaching process, chalk Dust inevitably sticks on hand, while the granule dust floated in air can also fall in teacher student's hair, on the face On neck, there is stimulation to skin membrane, if hot summer days meet sweat solution, produce alkaline matter, to mucocutaneous stimulation just It is bigger, because the environment that human body skin is survived is weak acid environment, the base of skin is so destroyed under dust alkalescence effect This living environment, chalk dust makes skin become dry, coarse, and feels with itching, makes human body uncomfortable, severe patient can cause Acne, epifolliculitis, pyoderma, chapped skin and a large amount of trichomadesis, influence and disturb teacher's normal work and life.Chalk Dust enters external auditory meatus, is mixed in sebum, can form ceruminal plug, if long-term in this way, can cause the generation of ear inflammation.Induce Among the composition of the current market chalk of Other diseases, in addition to relatively low containing metallic element, lead manganese, barium equal size, cadmium metal contains Measure higher, after cadmium is sucked by human body, major storage is obvious to these histologic lesions in liver, kidney, bone tissue, Long Term Contact cadmium Major lesions caused by compound are pulmonary emphysema and kidney damage, and the state of an illness can be in carry out sexual development, and Early manifestation is powerless, thin, head Dizzy, insomnia and dreamful sleep, anorexia and neurasthenia symptom, and have nosebleed, chronic pharyngitis, Atrophic nasal mucosas and ulcer etc. existing As.Pulmonary emphysema are slowly in progress, and patient has progressive expiratory dyspnea, and activity aggravates, with palpitaition.Cadmium is also most to be easily caused cancer simultaneously One of metallic element of disease.Influence chalk dust to air quality has stronger adsorption capacity, and many harmful levels of pathogens can Absorption is brought into student lung on fine dust, so as to facilitate the generation of acute and chronic inflammation, so as to cause student group Body group contagion respiratory tract and other epidemic diseases.Student during listening to the teacher, gradually dislike by the sanitary index such as indoor and total number of bacteria Change, can be interacted with fine chalk dust, harm of the aggravation chalk dust to teachers and students' health.Shadow of the chalk to myopia of student Ring for a long time, our teaching appliance continues to use the green plate of blackboard, metal and chalk mode, and student often uses books in black and white Deng because the vision of people is to identify font and its color by photosensitive, sense color, and the contrast of black and white is excessively strong, easily Cause the fatigue of vision, so as to cause the generation of student's large area myopia incidence of disease.

The content of the invention

In view of this, the purpose of the present invention is in view of the shortcomings of the prior art, there is provided one kind is stable to be advantageous to teachers and students The English teaching system of health, teacher can carry out setting-out at a distance, draw four line lattice specifications, can be wiped while setting-out black Plate, and dust can absorb, dust descends slowly and lightly seldom, and plant running will not stably damage blackboard.

To reach above-mentioned purpose, the present invention uses following technical scheme：A kind of stable English for being advantageous to teachers and students' health Language tutoring system, including several magnet strips being arranged in blackboard and the slide rail for being arranged on blackboard left and right ends, the slide rail It is interior that the slide plate with roller is set, scraper plate is provided with the upside of the slide plate, bottom plate, the bottom plate and blackboard are provided with the downside of the slide plate One end of contact is provided with fur, and the slide plate both ends are provided with baffle plate, and the baffle plate, bottom plate, scraper plate form iron after being contacted with blackboard Particle accommodating chamber, the interior iron particle that white coating is scribbled provided with several peripheries of iron particle accommodating chamber, the blackboard top is provided with For the drive mechanism for driving slide plate to move up and down, the slide plate is provided with blackboard-cleaning mechanism, and the blackboard-cleaning mechanism connects Vibration dust-collection mechanism is met, the vibration dust-collection mechanism is provided with dust non-proliferation mechanism.

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

Further, the blackboard-cleaning mechanism includes being arranged on slide plate top electromagnetism push rod and positioned at electromagnetism push rod freedom The blackboard brush at end, several guiding mechanisms are provided between the blackboard brush and slide plate.

Further, the guiding mechanism includes the guide cylinder being arranged on slide plate and is arranged on blackboard brush to stretch into guiding The guide rod of cylinder.

Further, the vibration dust-collection mechanism includes being arranged on vibrating motor on blackboard brush, the slide plate, scraper plate, The baffle plate of slide plate both sides, which is formed, stores up grey chamber, and the slide plate is provided with the air exhauster connected with storing up grey chamber, the air-out of the air exhauster Muzzle fills the cloth bag for collecting dust.

Further, the dust non-proliferation mechanism includes the cover plate being inclined on slide plate, and the cover plate upper end is set There is the sealing fur that grey chamber is stored up for sealing.

Further, electric expansion bar, vibrating motor, air exhauster are connected with programmable controller.

Further, the scraper plate end is provided with the abrasive rubber layer for being used for scraping iron particle.

Further, the suction after the iron particle is adsorbed is more than the bent radial power of fur, and iron particle is placed on iron After grain accommodating chamber, the bent radial power of fur is more than pressure of the iron particle to fur.

Further, the slide plate both ends are respectively provided with least two rollers.

Further, the abrasive rubber layer is made up of the raw material of following parts by weight, 50~70 parts of neoprene, butylbenzene rubber 20~25 parts of glue, 6~8 parts of magnesia, 8~10 parts of carbon black, 7~11 parts of paraffin, 3~6 parts of stearic acid, m-xylene diamine 6~8 Part.

A kind of control method of the stable English teaching system for being advantageous to teachers and students' health, comprises the following steps：

1）The iron particle for scribbling white coating is placed on iron particle accommodating chamber, Controlled by Programmable Controller electromagnetism push rod works, Blackboard brush is pressed on blackboard, now Controlled by Programmable Controller electric expansion bar works, and drives slide plate and blackboard brush to moving up Dynamic, blackboard brush is clean by blackboard-cleaning, and when iron particle runs into the magnet strip in blackboard, magnet strip adsorbs iron particle in blackboard Surface, electric expansion bar continue to drive slide plate and blackboard brush to move up, because the suction after iron particle is adsorbed is more than fur Bent radial power, fur is after moving up, it is impossible to brushes off the iron particle on blackboard, blackboard eraser is moved to blackboard top Afterwards, electric expansion bar power supply is disconnected by programmable controller, 4 magnet strips absorption iron particle in blackboard forms four standards Four line lattice；

2）When not needing four line lattice, the work of Controlled by Programmable Controller electromagnetism push rod, blackboard brush is pressed on blackboard, Ran Houke Programmable controller control electric expansion bar work, drives slide plate and blackboard brush to move down, and fur first contacts with iron particle, due to Suction after iron particle is adsorbed is more than the bent radial power of fur, and fur is after moving down, it is impossible to by the iron on blackboard Grain brushes off, and after scraper plate contacts with iron particle, scraper plate scrapes iron particle from blackboard, and iron particle falls in iron particle accommodating chamber, It is easy to draw next time to use, blackboard eraser is clean by blackboard-cleaning during moving down；

3）After blackboard eraser is moved to bottom, electric expansion bar power supply, programmable controller control are disconnected by programmable controller Electromagnetism push rod deenergization processed, the spring in electromagnetism push rod, which retracts blackboard eraser, makes blackboard brush not contacted with blackboard, programmable control Device control vibrating motor work processed, the dust on blackboard brush is shaken off and is storing up grey intracavitary, Controlled by Programmable Controller air exhauster work Make the ash for storing up grey intracavitary being transported to dust settling pocket.

Compared with prior art, the beneficial effects of the invention are as follows：The slide plate of the present invention uses high intensity Q420 steel steel plates, electricity Magnetic push rod is connected with the thrust that slide rheostat can control electromagnetism push rod, and the thrust of electromagnetism push rod is not more than the deformation power of steel plate, Deformed so as to anti-limited slip plate, just face slide plate and blackboard contact gap are big, and iron particle is spilt or scraper plate can not scrape iron particle Under；The iron particle for scribbling white coating is placed on iron particle accommodating chamber, the work of Controlled by Programmable Controller electromagnetism push rod will be black Scrubbing brush is pressed on blackboard, and now Controlled by Programmable Controller electric expansion bar works, and drives slide plate and blackboard brush to move up, black Scrubbing brush is clean by blackboard-cleaning, and when iron particle runs into the magnet strip in blackboard, magnet strip adsorbs iron particle on blackboard surface, Electric expansion bar continues to drive slide plate and blackboard brush to move up, and the suction after being adsorbed due to iron particle is more than the radial direction of fur Folding force, fur is after moving up, it is impossible to brushes off the iron particle on blackboard, after blackboard eraser is moved to blackboard top, passes through Programmable controller disconnects electric expansion bar power supply, and 4 magnet strips absorption iron particle in blackboard forms four lines of four standards Lattice；When not needing four line lattice, the work of Controlled by Programmable Controller electromagnetism push rod, blackboard brush is pressed on blackboard, then can be compiled Range controller control electric expansion bar work, drives slide plate and blackboard brush to move down, fur first contacts with iron particle, due to iron Suction after particle is adsorbed is more than the bent radial power of fur, and fur is after moving down, it is impossible to by the iron particle on blackboard Brush off, after scraper plate contacts with iron particle, scraper plate scrapes iron particle from blackboard, and iron particle falls in iron particle accommodating chamber, just Draw and use next time, blackboard eraser is clean by blackboard-cleaning during moving down；After blackboard eraser is moved to bottom, pass through Programmable controller disconnects electric expansion bar power supply, Controlled by Programmable Controller electromagnetism push rod deenergization, in electromagnetism push rod Spring, which retracts blackboard eraser, makes blackboard brush not contacted with blackboard, Controlled by Programmable Controller vibrating motor work, by blackboard brush Dust shake off and storing up grey intracavitary, the ash for storing up grey intracavitary is transported to dust settling pocket by the work of Controlled by Programmable Controller air exhauster.

Brief description of the drawings

The present invention is further detailed explanation with reference to the accompanying drawings and detailed description：

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

Fig. 2 is the cross section structure diagram of the present invention；

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

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.

Embodiment

Embodiment 1：As shown in Fig. 1,2,3,4,5,6, a kind of stable English teaching system for being advantageous to teachers and students' health, Including several magnet strips 9 being arranged in blackboard and the slide rail 1 for being arranged on the left and right ends of blackboard 3, tool is set in the slide rail There is the slide plate 7 of roller 2, the upside of slide plate 7 is provided with scraper plate, and the downside of slide plate 7 is provided with bottom plate 24, the bottom plate 24 and blackboard One end of contact is provided with fur 25, and the both ends of slide plate 7 are provided with baffle plate, after the baffle plate, bottom plate 24, scraper plate 18 contact with blackboard Iron particle accommodating chamber 19 is formed, scribbles the iron particle 20 of white coating in iron particle accommodating chamber provided with several peripheries, it is described black Plate top, which is provided with, to be used to drive the drive mechanism that slide plate moves up and down, and the slide plate is provided with blackboard-cleaning mechanism, the blackboard Wiping mechanism connection vibration dust-collection mechanism, the vibration dust-collection mechanism are provided with dust non-proliferation mechanism.

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

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

The guiding mechanism 8 includes the guide cylinder 23 being arranged on slide plate 7 and is arranged on blackboard brush to stretch into guide cylinder Guide rod 22.Play a part of righting-oriented blackboard brush, prevent blackboard brush from tilting, so as to ensure that it is stable that blackboard brush wipes.

The vibration dust-collection mechanism includes the vibrating motor 11 being arranged on blackboard brush, the slide plate 7, scraper plate 18, slide plate The baffle plate of both sides, which is formed, stores up grey chamber 13, and the slide plate is provided with the air exhauster 16 connected with storing up grey chamber, and the air exhauster 16 goes out Air port is set with the cloth bag 17 for collecting dust.

The dust non-proliferation mechanism includes the cover plate 26 being inclined on slide plate, and the cover plate upper end is provided with for close Envelope stores up the sealing fur 27 of grey chamber.

Electric expansion bar, vibrating motor, air exhauster are connected with programmable controller, can be grasped at a distance by controller Make.

The end of scraper plate 18 is provided with the abrasive rubber layer 15 for being used for scraping iron particle, and rubber layer soft wear resistant will not Blackboard is scratched.

The slide plate both ends are respectively provided with two rollers.

The distance on the magnet strip surface and blackboard surface is 1mm.

The difference of embodiment 2 and embodiment 1 is：Suction after the iron particle 20 is adsorbed is more than the radial direction of fur 25 Folding force, after iron particle is placed on iron particle accommodating chamber, the bent radial power of fur 25 is more than pressure of the iron particle to fur 25.

The abrasive rubber layer is made up of the raw material of following parts by weight, 50 parts of neoprene, 20 parts of butadiene-styrene rubber, magnesia 6 parts, 8 parts of carbon black, 7 parts of paraffin, 3 parts of stearic acid, 6 parts of m-xylene diamine.

The difference of embodiment 3 and embodiment 1 is：The blackboard has collecting tank 10, for preventing chalk or collection The iron particle fallen individually.The abrasive rubber layer is made up of the raw material of following parts by weight, 70 parts of neoprene, butadiene-styrene rubber 25 Part, 8 parts of magnesia, 10 parts of carbon black, 11 parts of paraffin, 6 parts of stearic acid, 8 parts of m-xylene diamine.

The difference of embodiment 4 and embodiment 1 is：The bottom plate 24 is provided with sloping baffle 21, be easy to iron particle with it is black Plate contacts.The abrasive rubber layer is made up of the raw material of following parts by weight, 60 parts of neoprene, 23 parts of butadiene-styrene rubber, magnesia 7 Part, 9 parts of carbon black, 10 parts of paraffin, 4.5 parts of stearic acid, 7 parts of m-xylene diamine.

Embodiment 2,3,4 is using the Special wear-resistant rubber of the present invention, and its pliability is good, and wear-resisting, pliability and wearability It can complement each other, reach good state, one side abrasive rubber can scrape iron particle, the work of another aspect rubber layer When surface ooze out silicone oil, help frictional contact surface lubrication, so as to extend the service life of rubber layer, what is more important will not be ground Damage blackboard.Tested by invention, the abrasive rubber service life using the present invention is 2 times of prior art, and is used 6 months Afterwards, using the rubber layer of the present invention a little all without abrasion blackboard, and rubber layer is also without damage, and uses the rubber of prior art Layer has worn substantially, and blackboard scratch is serious.

Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, this area is common Other modifications or equivalent substitution that technical staff is made to technical scheme, without departing from technical solution of the present invention Spirit and scope, all should cover among scope of the presently claimed invention.

Claims

A kind of 1. stable English teaching system for being advantageous to teachers and students' health, it is characterised in that：Including being arranged in blackboard Several magnet strips and the slide rail for being arranged on blackboard left and right ends, the slide rail is interior to set the slide plate with roller, the slide plate Upside is provided with scraper plate, is provided with bottom plate on the downside of the slide plate, one end that the bottom plate contacts with blackboard is provided with fur, the slide plate two End is provided with baffle plate, and the baffle plate, bottom plate, scraper plate form iron particle accommodating chamber, be provided with iron particle accommodating chamber after being contacted with blackboard Several peripheries scribble the iron particle of white coating, and the blackboard top, which is provided with, to be used to drive the driving machine that slide plate moves up and down Structure, the slide plate are provided with blackboard-cleaning mechanism, the blackboard-cleaning mechanism connection vibration dust-collection mechanism, the vibration dust-collection machine Structure is provided with dust non-proliferation mechanism, and the drive mechanism includes the electric expansion bar for being arranged on blackboard top, described electronic to stretch The free end of contracting bar is connected with slide plate, and the blackboard-cleaning mechanism includes being arranged on slide plate top electromagnetism push rod and pushing away positioned at electromagnetism The blackboard brush of bar free end, is provided with several guiding mechanisms between the blackboard brush and slide plate, the guiding mechanism includes being arranged on Guide cylinder on slide plate and the guide rod that guide cylinder is stretched on blackboard brush is arranged on, the vibration dust-collection mechanism includes being arranged on black Vibrating motor on scrubbing brush, the slide plate, scraper plate, the baffle plate of slide plate both sides, which are formed, stores up grey chamber, and the slide plate is provided with and storage ash The air exhauster of chamber connection, the air outlet of the air exhauster are set with the cloth bag for collecting dust, and the bottom plate is provided with to tilt and kept off Plate, the slide plate both ends are respectively provided with two rollers.
2. the stable English teaching system for being advantageous to teachers and students' health as claimed in claim 1, it is characterised in that：The powder Dirt non-proliferation mechanism includes the cover plate being inclined on slide plate, and it is soft that the cover plate upper end is provided with the sealing for being used to seal the grey chamber of storage Hair.
3. the stable English teaching system for being advantageous to teachers and students' health as claimed in claim 2, it is characterised in that：It is electronic to stretch Contracting bar, vibrating motor, air exhauster are connected with programmable controller.
4. the stable English teaching system for being advantageous to teachers and students' health as claimed in claim 3, it is characterised in that：It is described to scrape Plate end is provided with the abrasive rubber layer for being used for scraping iron particle.
5. the stable English teaching system for being advantageous to teachers and students' health as claimed in claim 4, it is characterised in that：It is described resistance to Rubber milling layer is made up of the raw material of following parts by weight, 50~70 parts of neoprene, 20~25 parts of butadiene-styrene rubber, magnesia 6~8 Part, 8~10 parts of carbon black, 7~11 parts of paraffin, 3~6 parts of stearic acid, 6~8 parts of m-xylene diamine.
A kind of 6. control of stable English teaching system for being advantageous to teachers and students' health as any one of claim 1-5 Method processed, it is characterised in that：

1）The iron particle for scribbling white coating is placed on iron particle accommodating chamber, Controlled by Programmable Controller electromagnetism push rod works, Blackboard brush is pressed on blackboard, now Controlled by Programmable Controller electric expansion bar works, and drives slide plate and blackboard brush to moving up Dynamic, blackboard brush is clean by blackboard-cleaning, and when iron particle runs into the magnet strip in blackboard, magnet strip adsorbs iron particle in blackboard Surface, electric expansion bar continue to drive slide plate and blackboard brush to move up, because the suction after iron particle is adsorbed is more than fur Bent radial power, fur is after moving up, it is impossible to brushes off the iron particle on blackboard, blackboard eraser is moved to blackboard top Afterwards, electric expansion bar power supply is disconnected by programmable controller, 4 magnet strips absorption iron particle in blackboard forms four standards Four line lattice；

2）When not needing four line lattice, the work of Controlled by Programmable Controller electromagnetism push rod, blackboard brush is pressed on blackboard, Ran Houke Programmable controller control electric expansion bar work, drives slide plate and blackboard brush to move down, and fur first contacts with iron particle, due to Suction after iron particle is adsorbed is more than the bent radial power of fur, and fur is after moving down, it is impossible to by the iron on blackboard Grain brushes off, and after scraper plate contacts with iron particle, scraper plate scrapes iron particle from blackboard, and iron particle falls in iron particle accommodating chamber, It is easy to draw next time to use, blackboard eraser is clean by blackboard-cleaning during moving down；

3）After blackboard eraser is moved to bottom, electric expansion bar power supply, programmable controller control are disconnected by programmable controller Electromagnetism push rod deenergization processed, the spring in electromagnetism push rod, which retracts blackboard eraser, makes blackboard brush not contacted with blackboard, programmable control Device control vibrating motor work processed, the dust on blackboard brush is shaken off and is storing up grey intracavitary, Controlled by Programmable Controller air exhauster work Make the ash for storing up grey intracavitary being transported to dust settling pocket.