CN208069214U

CN208069214U - A kind of dust absorption blackboard eraser

Info

Publication number: CN208069214U
Application number: CN201721843738.XU
Authority: CN
Inventors: 张文峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-12-25
Filing date: 2017-12-25
Publication date: 2018-11-09
Anticipated expiration: 2027-12-25

Abstract

The utility model discloses a kind of dust absorption blackboard eraser, including shell and wiper, wiper is equipped in shell, and channel, stomata, filtering slot, filter, dust catcher, air inlet and gas outlet are additionally provided in shell, and channel is that hollow ring is set to housing tip；Stomata is equipped with housing side, and channel is connected to from shell bottom end；It filters slot to be set between channel and dust catcher, is equipped with 2-5；Filter is set in filtering slot, is correspondingly provided with 2-5 grades；Dust catcher is set to housing central section, and air inlet is connected with gas outlet in dust catcher.The utility model absorbs chalk dust by classification, and using filter is soaked, absorption is more efficient, and dust-proof effect is more preferable, also allows for cleaning, it is therefore prevented that solid dust dances in the air, and use is extremely convenient, is conducive to promote and apply.

Description

A kind of dust absorption blackboard eraser

Technical field

The utility model is related to teaching equipment field, more particularly to a kind of dust absorption blackboard eraser.

Background technology

Chalk is tool widely used in daily life, is generally used for being written on blackboard.The chalk in ancient times is usually used Natural chalk is made, but is mostly used other substance substitutions now.The ingredient of chalk is a kind of white depositions of calcium sulfate, no It is easy to be decomposed, particle is bigger than dust.Pass through test, a concentration of 1.82~21.7mg/m of classroom chalk dust³, this concentration is higher than work Industry place 10mg/m³Sanitary standard, and teacher's setting and classroom front row concentration are apparently higher than intermediate and heel row.Dispersion degree is surveyed Determine the result shows that chalk dust dispersion degree is higher, particle of the grain size less than 5um accounts for 72 15% at teacher's setting, and preceding ranking is in Chalk dust dispersion degree at ranking is high compared at dais, and the 90% of total grit is nearly reached less than the particle of 5um.

Teacher need to often write and draw on the blackboard to explain.It is necessary to erasable number in 45~50 minutes class Secondary, lower class hour will often all be leaving one layer of white chalk dust on hand, on sleeve or even on hair, shoulder.Every day, Nian Fu 1 year, after working 20~30 years, tens of thousands of chalk have been consumed.Inevitably some chalk dusts are sucked from nostril.It is related Surface is studied, chalk dust is harmful to lung, respiratory tract, eyes, skin, ear.It is most commonly seen with lung, in teaching process, powder Ash is easy to be inhaled into lung, and majority is delayed in alveolar, and by a series of stimulation, chemistry and immune effect can make It is lost at lung, including inflammation in respiratory system and pulmonary ventilation function decline, common pulmonary disease has：Chronic, acute pneumonia, lung Cancer, pneumoconiosis etc. (contain silica in chalk dust, are inhaled into lung, in the dioxide-containing silica that lung dissociates hundred The dust of/mono- pulmonary fibrosis formed above causes lung's respiratory function to decline to make alveolar fibrosis)；Chalk dust It includes nose, pharynx, bronchus that approach into lung, which is by the upper respiratory tract, and in this course, part dust, which can stay in, exhales Road is inhaled, mechanical stimulus and damage are generated to mucomembranous epithelial cell, works in such a case for a long time, a series of disease can be caused Become, wherein the influence to nose most commonly induces rhinitis sicca, followed by hypertrophic rhinitis, symptom is mycteroxerosis, nose Plug, nasal membrane are congested, secretion increases;Influence to pharynx mainly induces chronic pharyngitis, makes pharyngeal drying, coughs up phlegm not Refreshing, pharyngalgia pharynx is itched;Chronic bronchitis is mainly induced on bronchial influence, can also cause asthma sometimes, in addition also having can It can cause the canceration of the parts such as nasopharynx, bronchus；Chalk dust is fallen into eye, stimulate lacrimal secretion, tears hydrolyze calcium carbonate and Alkaline matter is generated, eye mucous membranes will be seriously stimulated, causes mucosa injury, forms chronic inflammation, it is also possible to induce myopia It generates；Chalk dust is inevitably stained on hand, at the same the granule dust floated in air can also fall teacher's hair, On the face on neck, there is stimulation to skin membrane, if hot summer days meet sweat solution, alkaline matter is generated, to mucocutaneous thorn Swash with regard to bigger, because the environment that human skin is survived is weak acid environment, destroys skin under the effect of dust alkalinity in this way Basic living environment, chalk dust makes skin become dry, coarse, and feels with itching, keeps human body uncomfortable, severe patient's meeting Cause acne, epifolliculitis, pyoderma, chapped skin and a large amount of trichomadesis, influences and disturb teacher's normal work and life； Chalk dust enters external auditory canal, is mixed in sebum, can form ceruminal plug, if long-term in this way, can cause the generation of ear inflammation.

Chalk dust not only influences the health of teacher, the health of the student in stage and crisis is being grown up, so reducing powder Dirt becomes very urgent problem to the harm of teacher and student.

Invention content

The technical problem to be solved by the utility model is to provide a kind of dust suction, good dustproof effects, are inhaled using simple Dirt blackboard eraser.

To solve the above problems, the utility model adopts the following technical solution：

A kind of dust absorption blackboard eraser, including shell and wiper, the wiper are equipped in shell, are additionally provided in the shell logical Road, stomata, filtering slot, filter, dust catcher, air inlet and gas outlet, the channel are that hollow ring is set to housing tip；Institute It states stomata and is set to housing side, channel is connected to from shell bottom end；The filtering slot is set between channel and dust catcher, is equipped with 2-5；The filter is set in filtering slot, is correspondingly provided with 2-5 grades；The dust catcher is set to housing central section, the air inlet Mouth is connected with gas outlet in dust catcher.

The filter is made of the different papery in aperture, cloth or extra large pa material.

The filter is the papery soaked, cloth or extra large pa filter.

The side of described gas outlet one end is equipped with button.

The utility model has the beneficial effects that：The utility model absorbs chalk dust by classification, and uses and soak filter, Absorb more efficient, dust-proof effect is more preferable, also allows for cleaning, it is therefore prevented that solid dust dances in the air, and use is extremely convenient, is conducive to promote Using.

Description of the drawings

Fig. 1 is a kind of schematic diagram of dust absorption blackboard eraser of the utility model.

Fig. 2 is a kind of overall structure figure of dust absorption blackboard eraser of the utility model.

Specific implementation mode

Refering to fig. 1 shown in -2, a kind of dust absorption blackboard eraser, including shell 1 and wiper 2, the wiper 2 are equipped in shell 1, institute It states and is additionally provided with channel 11, stomata 12, filtering slot 13, filter 14, dust catcher 15, air inlet 16 and gas outlet 17 in shell 1, The channel 11 is that hollow ring is set to 1 top of shell；The stomata 12 is set to 1 side of shell, and channel is connected to from 1 bottom end of shell 11；The filtering slot 13 is set between channel 11 and dust catcher 15, is equipped with 2-5；The filter 14 is set to filtering slot In 13, it is correspondingly provided with 2-5 grades；The dust catcher 15 is set to 1 middle part of shell, and the air inlet 16 and gas outlet 17 are in dust catcher 15 Connection.

The filter 14 is made of the different papery in aperture, cloth or extra large pa material.

The filter 14 is the papery soaked, cloth or extra large pa filter.

The side of 17 one end of the gas outlet is equipped with button 18.

Before use, being packed into battery in dust catcher 15 or charging.In use, 17 1 sections of gas outlet is preceding, thumb by 18 position of button；When erasing the board, only it need to start dust catcher 15, the chalk dust clashed will be by the stomata 12 of side by lower button 18 It is drawn into through-hole 11, and is filtered by the filter 14 of different pore size, adsorbing powder dust is on the filter 14 soaked so that goes out Gas port 17 excludes clean gas；Periodically filter 14 is removed, is rinsed with water clean；If long-term be not used, needed before use Filter 14 is soaked, it is ensured that adsorb the effect of dust.

Above description is only a specific implementation of the present invention, but the scope of protection of the utility model is not limited to In this, any change or replacement expected without creative work should all be covered subject to scope of protection of the utility model.

Claims

1. a kind of dust absorption blackboard eraser, including shell and wiper, the wiper is equipped in shell, it is characterised in that：In the shell It is additionally provided with channel, stomata, filtering slot, filter, dust catcher, air inlet and gas outlet, the channel is that hollow ring is set to shell Body top；The stomata is set to housing side, and channel is connected to from shell bottom end；The filtering slot is set to channel and dust catcher Between, it is equipped with 2-5；The filter is set in filtering slot, is correspondingly provided with 2-5 grades；The dust catcher is set to housing central section, The air inlet is connected with gas outlet in dust catcher.

2. a kind of dust absorption blackboard eraser according to claim 1, it is characterised in that：The filter is the different paper in aperture Matter, cloth or extra large pa material are made.

3. a kind of dust absorption blackboard eraser according to claim 2, it is characterised in that：The filter is the papery soaked, cloth Matter or extra large pa filter.

4. a kind of dust absorption blackboard eraser according to claim 1, it is characterised in that：The side of described gas outlet one end is equipped with and presses Button.