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109results about "Board cleaning devices" patented technology
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Blackboard eraser
Owner:王壮一
Electronic paper blackboard device and control method
The application relates to the technical field of electronic paper, in particular to an electronic paper blackboard device and a control method. A controller is electrically connected with the electronic paper blackboard. An electronic chalk is provided with a first magnet, and the first magnet is detachably connected with the electronic chalk. The electronic chalk is used for changing the magnetic pole direction of a magnetic electronic ink material through the first magnet, so that the color of the magnetic electronic ink material is changed to form written content. A passive blackboard eraser is provided with a second magnet, and the second magnet is detachably connected with the passive blackboard eraser. The passive blackboard eraser is used for resetting the magnetic pole direction of the magnetic electronic ink material through the second magnet, so that the corresponding written content is erased, thereby realizing the traditional blackboard function. The electronic paper blackboard can be conveniently written and erased, and the reflection of the electronic paper blackboard does not affect the vision of children, which is beneficial to human health.
Owner:GUANGZHOU OED TECH INC
Changeable display device for mathematical drawing learning and training
The invention discloses a changeable display device for mathematical drawing learning and training, and relates to the technical field of display devices. The blackboard comprises a blackboard body, the blackboard body is slidably connected with a display main body, the blackboard body is slidably connected with a cleaning brush, the cleaning brush is in threaded connection with a reciprocating threaded rod, the reciprocating threaded rod is rotationally installed on the blackboard body, the blackboard body is provided with a dust suction opening, the dust suction opening communicates with a dust suction mechanism, and the dust suction mechanism comprises a dust suction cylinder arranged on the blackboard body; and a first one-way valve is arranged between the dust collection barrel and the dust collection opening, a sealing ring is slidably connected to the interior of the dust collection barrel, the sealing ring is in threaded connection with a threaded rod, and the threaded rod is connected with a reciprocating threaded rod through a transmission mechanism. The reciprocating threaded rod rotates to drive the cleaning brush, the transmission mechanism is in linkage with the dust suction mechanism, a negative pressure dust suction system is formed, dust generated in the wiping process is sucked in real time, and potential threats caused by dust flying to the health of teaching personnel and students are avoided.
Owner:SICHUAN WATER CONSERVANCY VOCATIONAL & TECH COLLEGE
Interactive teaching display device
The utility model discloses an interactive teaching display device, which relates to the technical field of teaching tools, and comprises a mounting box and a display board, the front and top of the mounting box are opened, the two sides of the front of the mounting box are fixedly connected with front baffles, and the two sides in the mounting box are fixedly connected with a plurality of groups of clapboards arranged at equal intervals. A plurality of groups of display boards are arranged, each group of display boards is arranged between two adjacent groups of partition boards in a sliding manner, each group of display boards comprises a white board body, the two sides of the white board body are fixedly connected with side boards in sliding fit with the partition boards on the two sides, and the upper end of the back face of the white board body is fixedly connected with a board wiping pad used for cleaning the white board body. And first fixing holes are formed in each group of partition plates. Due to the fact that the number of the whiteboard bodies is large, the whiteboard bodies recording important knowledge points can be erected at obvious positions such as a wall or a table top in the teaching process, and students with poor understanding ability can think continuously.
Owner:HEBEI VOCATIONAL & TECH UNIV OF SCI & TECH
Data analysis calculation board
The utility model discloses a data analysis calculation board, and relates to the technical field of calculation boards. The device comprises a U-shaped plate, the bottom of the U-shaped plate is provided with a support assembly for assisting the support assembly to move, a soft white board is laid on the front side of the U-shaped plate, the left side and the right side of the interior of the U-shaped plate are respectively provided with a winding assembly used for winding the soft white board, and the front side of the U-shaped plate is provided with a frame assembly used for fixing the soft white board. The frame body assembly is controlled to extrude and fix the soft white board again, at the moment, the surface of the soft white board located on the front side of the U-shaped plate is not written, a user can continue to write, the written part of the soft white board passes through the interior of the corresponding strip-shaped hole before being rolled, and therefore the soft white board is not prone to falling off. Due to the fact that the wiping assembly used for wiping the soft whiteboard is arranged in the strip-shaped hole, handwriting written on the surface of the soft whiteboard can be wiped away so as to facilitate later reuse, a user does not need to wait for a long time and wipe the panel in the process, and the use experience of the user is effectively improved.
Owner:白雪
A contrast learning device for marketing education
The application belongs to the field of teaching aids, and particularly relates to a contrast learning device for marketing teaching, which comprises a support frame, assembly plates fixedly connected to the four corners of the back of the assembly frame, a partition plate fixedly connected to the middle end of the inner wall of the support frame, and inner plates symmetrically installed on the two sides of the partition plate relative to the inner wall of the support frame, wherein the device further comprises a driving assembly, a turnover outer plate, a control assembly, a wiping assembly and a dust suction assembly, the driving assembly is installed on the partition plate, one end of the turnover outer plate is installed on the driving assembly, the outer surface of the turnover outer plate is in contact with the outer surface of the inner plate, the control assembly is installed on the turnover outer plate, the wiping assembly is installed on the support frame, and the dust suction assembly is installed on the back of the support frame. Thus, the problems of frequent manual replacement of display content, low cleaning efficiency and complicated operation of the traditional device are solved, and the problems of dust diffusion and pollution of the teaching environment during manual wiping and harm to the health of teachers and students are solved.
Owner:PUYANG PETROCHEMICAL VOCATIONAL & TECH COLLEGE
Writing display board
The utility model discloses a writing display board, and relates to the technical field of teaching equipment. Comprising a supporting column, a U-shaped frame arranged at the top end of the supporting column, a display board body arranged in the U-shaped frame in a sliding mode, a material collecting groove formed in the bottom end of the display board body and a telescopic assembly arranged between the bottom end of the display board body and the bottom wall of the U-shaped frame. By arranging the U-shaped frame, arranging the display board body in the U-shaped frame in a sliding mode and arranging the telescopic assembly between the U-shaped frame and the bottom wall of the display board body, the display board body can move up and down in the U-shaped frame under the action of the telescopic assembly, and then the height of the display board body is adjusted; the display board is suitable for users with different heights, so that the use flexibility of the display board is improved; and the collecting groove is formed in the bottom end of the display board body, so that the pencil shavings can be collected and prevented from directly falling onto the ground to pollute the ground.
Owner:长春科技学院
An easy-to-clean writing board
ActiveCN224276693Uavoid flyingavoid health hazardsBoard cleaning devicesWriting boardsElectric machineryPhysics
This utility model relates to the field of writing tablet technology and discloses an easy-to-clean writing tablet, including a writing tablet body. A connecting block is fixedly connected to the outer wall of the writing tablet body. A sliding block is fixedly connected to the outer wall of the connecting block. A support block is slidably connected to the outer wall of the sliding block. A support plate is fixedly connected to the lower surface of the support block. A motor is fixedly connected inside the connecting block. A gear is fixedly connected to the output end of the motor. A slide rail is fixedly connected to the inner wall of the connecting block. A sliding assembly is provided on the inner wall of the connecting block. The sliding assembly includes a second sliding block, a rack, and a scraper. The outer wall of the second sliding block is slidably connected to the inner wall of the connecting block. In this utility model, the motor drives the gear to rotate, causing the rack to drive the second sliding block to slide on the slide rail. The second sliding block drives the scraper to slide on the writing tablet body. Symmetrical scrapers are provided on both sides of the writing tablet body.
Owner:JINJIANG HONGSHUN CHILDRENS PROD CO LTD
Multifunctional teaching moving frame
The utility model relates to the technical field of teaching appliances, and discloses a multifunctional teaching moving frame which comprises a moving seat and a blackboard, a supporting mechanism is arranged in the moving seat and used for rapidly fixing the whole device, and a dust collection mechanism is arranged on the right side of the blackboard and used for collecting dust on the blackboard. The dust collection mechanism is used for cleaning generated chalk dust, and an adjusting mechanism is arranged at the top of the moving seat and used for adjusting the height of the blackboard. The supporting mechanism comprises a plurality of sliding wheels, and the tops of the multiple sliding wheels are installed at the four corners of the bottom of the movable base. According to the device, the electric push rod is started to drive the ejector block to be unfolded towards the two sides, the ejector block is inserted between the extrusion blocks, the extension block is driven to be unfolded towards the two sides, and the extension block can press the lifting plate downwards, so that the lifting plate slides downwards on the supporting column, and the device is rapidly supported.
Owner:山东电子职业技术学院
Tactical training board
Owner:GUANGZHOU GAIA SPORTS GOODS CO LTD
Scraping device and scraping assembly
The present application provides a scraping device and a scraping assembly, the scraping device comprising: a scraping member (10) connected to a body (30) of the scraping device; a posture adjustment assembly (20) for adjusting the posture of the scraping member (10), so that when the scraping device reciprocates to scrape the surface to be cleaned, the scraping member (10) is always in an inclined position relative to the moving direction, and the first end (11) of the scraping member (10) is always located at the front side of the moving direction relative to the second end (12); wherein the first end (11) is one end of the scraping member (10) along the length direction, and the second end (12) is the other end of the scraping member (10) along the length direction. The scraping device provided by the present application has higher cleaning efficiency.
Owner:XINGPINGJIABANGSHOU IND CO LTD
Intelligent blackboard eraser
The intelligent blackboard eraser comprises a first shell and a second shell, the second shell is of a hollow square structure, a circular through hole is formed in the top face of the second shell, a fan is arranged at the position of the circular through hole, the inner wall of the circular through hole is detachably connected with a rear cover, and ventilation holes are formed in the side wall of the second shell; the second shell is detachably connected with the first shell, the first shell is of a square structure with an open upper end and a hollow interior, a protective shell is arranged in the first shell, a control module and a vibration motor are arranged in the protective shell, and the protective shell is detachably connected with the first shell; the control module comprises a controller, an attitude sensor, a voice module and a driving circuit; a felt plate is arranged on the bottom surface of the first shell, and the felt plate is detachably connected with the first shell; and a plurality of curved air ducts are arranged between the first shell and the second shell. The dust collection power is adjusted along with the wiping speed, the function of switching on and switching off is achieved according to voice instructions, and use is convenient.
Owner:NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
Intelligent blackboard capable of adjusting angle
The intelligent blackboard capable of adjusting the angle comprises a blackboard body and a bottom plate, the blackboard body is located at the top of the bottom plate, an erasing assembly is installed at the top of the blackboard body, and the same supporting assembly is installed between the blackboard body and the bottom plate; the erasing assembly comprises two mounting plates detachably mounted at the tops of the outer walls of the two sides of the blackboard body, a same lead screw is rotationally connected between the two mounting plates, the lead screw is sleeved with a mounting block in a threaded mode, a horizontally-arranged limiting rod is fixedly connected between the two mounting plates, and the limiting rod is slidably sleeved with the mounting block. According to the blackboard, the erasing assembly is arranged, so that the surface of the blackboard body can be rapidly and comprehensively cleaned when needed, the labor intensity of teachers is greatly reduced, and the teachers do not need to be close to the blackboard and can be prevented from inhaling dust to affect the body health.
Owner:HENAN RUIZHICHUANG ELECTRONIC TECH CO LTD
Multi-color dry-erase marker apparatus and inserts
Devices for writing and dry erase marker(s) with integrated eraser(s), insert(s) associated therewith, and a method for making and / or using the same can be provided. The device can include a body comprising an aperture and a release button, and a plunger cartridge assembly provided in the body. The plunger cartridge assembly can be configured to be deployed through the aperture and retracted by pressing the release button. The plunger cartridge assembly can also be removable from the body by pressing the release button when in a retracted position.
Owner:EMS MINDREADER LLC
Multifunctional blackboard
The utility model provides a multifunctional blackboard which comprises an installation frame, one side of the installation frame is fixedly connected with a display screen and a fixed blackboard, one side of the installation frame is connected with a cleaning assembly in a sliding mode, the middle of the installation frame is fixedly connected with an air suction opening, and the two sides of the air suction opening are fixedly connected between the display screen and the fixed blackboard. The air outlet end of the exhaust inlet is fixedly connected with a ventilation pipe, one end of the ventilation pipe is fixedly connected with an air outlet, the inner side of the air outlet is fixedly connected with a plurality of silent fans, and the air outlet end of the air outlet faces the display screen host end; sliding grooves are formed in the upper side and the lower side of the mounting frame, and movable blackboards are slidably connected to the inner sides of the sliding grooves. Through linkage operation of an air suction opening and a silent fan, floating chalk dust is actively adsorbed when a blackboard is erased, the chalk dust is filtered through a ventilation pipe and then treated in a centralized mode, and meanwhile airflow is used for cooling a host part of a display screen; dust pollution is effectively reduced, electronic components are prevented from being overheated, and teaching environment health and equipment protection are both considered.
Owner:HEBEI HAIBU SPORTING GOODS CO LTD
Multimedia education and teaching device
ActiveCN121505937BBoard cleaning devicesWriting boardsComputer graphics (images)Computer engineering
The application relates to the technical field of teaching aids, and provides a multimedia education and teaching device, which comprises a multimedia display system and a platform control system, wherein the multimedia display system comprises a blackboard unit, a multimedia screen and a first wireless communication module; the first wireless communication module is used for receiving control instructions and image information of the platform control system; the blackboard unit comprises a frame assembly and a plurality of blackboard plates; the frame assembly has a mounting area and a storage area; the multimedia screen is fixedly mounted on the mounting area; the inner frame bottom wall of the frame assembly is fixed with a sliding track; one of all the blackboard plates is arranged as an edge plate; the edge plate is movably arranged in the storage area; and the remaining blackboard plates are respectively slidably mounted on the sliding track. Based on the above, the multimedia screen with a larger size can be mounted by collectively storing the blackboard plates on one side of the blackboard unit, so that students in the back row can clearly see the content displayed on the multimedia screen.
Owner:MINNAN INST OF SCI & TECH
A portable hand-writing communication board
ActiveCN224335366UFlexible useeasy to useBoard cleaning devicesWriting boardsHandwritingSoftware engineering
The utility model discloses a portable handwriting communication board, including the board frame, one side installation of board frame in winding assembly, winding assembly includes the reel, scroll spring, reel and installation cavity, and the reel outside is wound with writing tape, and the free end of writing tape is connected with extension assembly, and extension assembly includes the accommodation cavity, extension pull plate, cross lock bolt and pull handle. Advantageous effect lies in: the utility model discloses a winding assembly and extension assembly are installed on the board frame, so that the handwriting communication board can realize the increase of writing area according to the actual use needs of user when using, so that the language barrier user can express the thought completely in the communication, and the language barrier user and other people's smooth communication are convenient, make the handwriting communication board more flexible, and the use effect is better.
Owner:HUNAN HAIHONG MEDICAL TECH CO LTD
Scrubbing mechanism for intelligent blackboard
The utility model discloses a scrubbing mechanism for an intelligent blackboard, which belongs to the field of teaching and comprises the intelligent blackboard, a scrubbing translation device is arranged above the intelligent blackboard, and a quick-dry scrubbing mechanism is arranged on one side of the scrubbing translation device. Compared with the prior art, the device has the advantages that the dry mirror surface wiping cloth is additionally arranged behind the mirror surface wiping cloth for wiping and humidifying, the water absorption sponge is arranged behind the dry mirror surface wiping cloth, and water stains on a blackboard are absorbed through the water absorption sponge, so that the mirror surface wiping cloth for wiping can be used for a long time; therefore, re-writing of the blackboard is facilitated. And during humidification, the water sealing beads can be separated from the water through holes only by manually pressing the shell cover on the humidification side, so that humidification is completed, after humidification is completed, the water sealing beads complete sealing of the cleaning liquid storage shell again under the action of the pressure spring, and the situation that the mirror surface wiping cloth on the side is too wet is avoided.
Owner:HEBEI HUAFA EDUCATION TECH CORP LTD
Automatic blackboard cleaning machine
The invention belongs to the technical field of teaching, and discloses an automatic blackboard cleaning machine. The device comprises a T-shaped lead screw rail electric sliding rail module, a miniature two-item four-line stroke stepping motor, a screw nut, a PVC foam board, a household push-pull blackboard dust box, a USB electric sprayer water pump, a waterproof adhesive tape, a long-strip high-density foam dish washing sponge, an aluminum alloy h-shaped groove, a plastic square PVC pipe, a household washboard pad and a DM420 digital low-noise low-heat stepping motor driver. And the STM32F103 is used for developing a C8T6 minimum system board in an embedded manner. The system improves the teaching efficiency, improves the teaching environment, stimulates the interest of students in science and technology, promotes the education intelligence, reduces the labor intensity of teachers, and is an important innovation in the education field.
Owner:ZHEJIANG UNIV OF WATER RESOURCES & ELECTRIC POWER
Article classifying and placing device for clinical respiration professional administrative management
The utility model relates to the technical field of article placement, and discloses an article classification placement device for clinical respiration professional administrative management, which comprises a placement cabinet and a storage box arranged above the placement cabinet, and two writing components and a cabinet-side storage component are arranged on one side of the placement cabinet and used for storing articles such as a stethoscope, a flashlight and a tongue depressor; the writing assembly comprises a cabinet door, one side of the cabinet door is fixedly connected with an iron plate and a writing board, the writing board is arranged below the iron plate, one side of the iron plate is provided with a plurality of magnetic buckles, and one side of the writing board is fixedly connected with a fixing rod; the storage assembly comprises a row of storage racks and a plurality of storage boxes, and in addition, through the arrangement of the adjusting assembly, the function of conveniently adjusting transverse partition plates in the storage cabinet for classified placement of articles is added. According to the utility model, writing and storage are facilitated, and space is fully utilized for information display, so that administrative management or clinical information transmission is facilitated, and the communication efficiency of teams in the clinical respiration major is improved.
Owner:THE WEST CHINA SECOND UNIV HOSPITAL OF SICHUAN
Teaching aids
This utility model discloses a teaching aid, including a writing board, a detachable eraser mechanism, and a collection mechanism. The sliding groove is located on the upper and lower front sides of the writing board. A guide rod is fixedly connected between the two sides inside the sliding groove. Sliding blocks are slidably connected inside the sliding groove. The detachable eraser mechanism is disposed between the sliding blocks. A collection mechanism is located at the lower end of the writing board. The advantages of this utility model compared to existing technologies are: With the detachable eraser mechanism, when a large amount of chalk dust adheres to the sponge after multiple erasings of the writing board, pulling the handle forward and rotating the two knobs 90° respectively will engage the two ends of the knobs with the front of the locking block, thus detaching the sponge from the writing board and keeping it stationary. The teacher can then tear the sponge to separate the male and female hook and loop fasteners, allowing for quick removal and easy replacement and cleaning, ensuring effective erasing of the writing board.
Owner:GUANGDONG COLLEGE OF BUSINESS & TECH
Multi-color dry-erase marker apparatus and inserts
Devices for writing and dry erase marker(s) with integrated eraser(s), insert(s) associated therewith, and a method for making and / or using the same can be provided. The device can include a body comprising an aperture and a release button, and a plunger cartridge assembly provided in the body. The plunger cartridge assembly can be configured to be deployed through the aperture and retracted by pressing the release button. The plunger cartridge assembly can also be removable from the body by pressing the release button when in a retracted position.
Owner:EMS MINDREADER LLC
Multifunctional teaching aid
The utility model discloses a multifunctional teaching aid. The multifunctional teaching aid comprises a base; the limiting cover shell is movably arranged on the base, and a containing groove used for containing a blackboard eraser is formed in the limiting cover shell; the cleaning box body is movably arranged on the base; the blackboard eraser is movably arranged on the placing groove, and the blackboard eraser comprises a sponge and an extrusion structure which is arranged on the sponge and can extrude the sponge; the chalk storage box is arranged on one side of the base and used for containing chalks, and a chalk taking mechanism capable of sending the chalks out of the chalk storage box is further arranged in the chalk storage box. Through cooperative arrangement of the limiting cover shell and the cleaning box body, after the blackboard eraser is placed in the cleaning cavity to be cleaned and water is squeezed through the squeezing structure, the blackboard eraser is placed on the containing groove to be automatically aired, the water flowing out of the blackboard eraser can also automatically drip into the cleaning box body, the situation that sewage flies around is avoided, and the blackboard eraser is clean and tidy; meanwhile, the chalk storage box is arranged to replace an original paper box body, chalk storage is more convenient, and practicability and convenience are achieved.
Owner:万付银
A contrastive explanation board for Chinese education
The application relates to the technical field of teaching aids, in particular to a contrast explanation board for Chinese education for foreigners, which comprises a bottom shell, a fixed plate is welded on the side wall of each rotating disc, a sliding rail is welded between every two adjacent fixed plates, two movable plates are slidably arranged on each sliding rail, a second spring is arranged around each sliding rail, a connecting rod is welded between every two adjacent movable plates, and a partition plate is welded between every two adjacent connecting rods. The device is configured with movable partition plates at the bottom of the writing board to form a precise suction air flow field in cooperation with a negative pressure fan, so that dust scattered in the writing process can be efficiently captured. In view of the problem that chalk heads and chalk fragments may be stuck in the gap between adjacent partition plates during the reset stage of the partition plates, the automatic cleaning of the stuck sundries can be realized by the self-driving characteristics of the mechanical structure, so that the device can adapt to harsh working conditions with high dust, and has practicability and economy.
Owner:SHANDONG UNIV OF FINANCE & ECONOMICS
Novel chalk groove structure
Owner:黄月芝
A portable word memory card for English learning
The utility model relates to a portable word memory card for english learning, aims at solving the problem of single function, lacking interactivity and poor memory effect of the existing english learning tool. The device includes shell body, transmission belt, transmission roller, cleaning roller and knob. The shell body is in the shape of a cuboid, hollow inside, used for accommodating other components. The transmission belt is installed inside the shell body, made of transparent material, and the outer surface can be used for direct drawing and marking with a pen, which is convenient for temporary memory. The transmission roller is arranged inside the shell body and connected with the transmission belt. The transmission roller can drive the transmission belt to rotate by rotating the knob. The cleaning roller is arranged at both ends of the shell body and closely attached to the transmission belt, used for cleaning the smearing marks on the surface of the transmission belt to achieve corrosion prevention. The device provides an efficient, convenient and durable english learning aid through the synergistic effect of various components, which can effectively help users to remember words and improve learning efficiency.
Owner:李伟伟
Automatic cleaning tool for blackboard
Owner:HUBEI QINGHE EDUCATION TECHNOLOGY CO LTD
Hearing device with picture erasing function
The utility model discloses a hearing device with a picture erasing function, which relates to the technical field of educational appliances, and comprises a loading base, an assembling groove body is arranged at the upper end of the surface of the loading base, a writing board body is clamped at the upper end of an inner cavity of the assembling groove body, a cleaning erasing board is arranged at the upper end of the surface of the loading base, and the upper end of the surface of the loading base is provided with a display screen. A conductive column is horizontally arranged in an inner cavity of the assembling groove body, and a power connection assembly is arranged on one side of the outer surface of the conductive column and comprises a power connection block used for being connected with the conductive column to be powered on. According to the scheme, the written content can be directly and quickly erased on the hearing device without additional tools, and the playing speed of the hearing material can be automatically paused or slowed down when the erasing operation is carried out, so that a user is ensured not to miss any important information.
Owner:黄俊
Double-drum cloth rolling tension spring type blackboard eraser
The utility model discloses a double-cylinder cloth rolling tension spring type blackboard eraser, which comprises a first cylinder body, a second cylinder body, a tension spring and a strip wiping rag, the cross section of the first cylinder body is circular, the cross section of the second cylinder body is circular, or the shape of the combination of a plurality of circles, protruding columns are arranged at the center positions of the two ends of the first barrel and the center positions of the two ends of the second barrel, the protruding columns at the same ends of the first barrel and the second barrel are connected through a tension spring, the two ends of the long-strip-shaped wiping cloth are wound around the first barrel and the second barrel respectively, and under the tension effect of the tension spring, the two barrels are attached to each other and clamp the long-strip-shaped wiping cloth. According to the blackboard eraser, when rolled cloth is wound, only one barrel body needs to rotate along the surface of the other barrel body, the tension spring does not need to be drastically pulled for multiple times, overall operation is convenient and smooth, fatigue deformation of the tension spring is reduced, flying dust can be reduced, and health is guaranteed; the blackboard eraser is convenient to disassemble and clean, simple in structure, long in service life, low in production cost and beneficial to market popularization.
Owner:FUYANG NORMAL UNIVERSITY
Manual blackboard eraser dust collection device
The utility model provides a manual blackboard eraser dust collection device, which belongs to the technical field of teaching auxiliary equipment and comprises a device body, a sliding chute is arranged at the top of the device body, a dust collection port is arranged at the bottom of the sliding chute and is arranged along the width direction of the sliding chute, an air outlet is arranged on one side of the device body, and a negative pressure channel is arranged inside the device body. One end of the negative-pressure channel communicates with the dust suction inlet, the other end of the negative-pressure channel communicates with the air outlet, a dust collecting chamber, a filtering assembly and a negative-pressure fan are sequentially arranged in the negative-pressure channel in the air flowing direction, and the filtering assembly is used for preventing dust from entering the negative-pressure fan from the dust collecting chamber. According to the manual blackboard eraser dust collection device, the bristle end of a blackboard eraser sequentially passes through the dust collection opening, chalk dust attached to the bristle end is hung off through the edge of the dust collection opening and sucked into the negative pressure channel under the action of negative pressure airflow, the chalk dust is blocked by the filtering assembly in the dust collection chamber to be collected in a centralized mode, and the chalk dust cannot fly.
Owner:SHIJIAZHUANG KEDA STATIONERY