CN110843384A - Auxiliary device utilizing track rack - Google Patents

Auxiliary device utilizing track rack Download PDF

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Publication number
CN110843384A
CN110843384A CN201911254436.2A CN201911254436A CN110843384A CN 110843384 A CN110843384 A CN 110843384A CN 201911254436 A CN201911254436 A CN 201911254436A CN 110843384 A CN110843384 A CN 110843384A
Authority
CN
China
Prior art keywords
fixedly connected
blackboard
auxiliary device
wall
fixed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911254436.2A
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Chinese (zh)
Inventor
段兴盛
庄亚红
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Institute of Industry Technology
Original Assignee
Nanjing Institute of Industry Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nanjing Institute of Industry Technology filed Critical Nanjing Institute of Industry Technology
Priority to CN201911254436.2A priority Critical patent/CN110843384A/en
Publication of CN110843384A publication Critical patent/CN110843384A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L1/00Repeatedly-usable boards or tablets for writing or drawing
    • B43L1/04Blackboards
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D47/00Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/06Spray cleaning
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L21/00Blackboard or slate cleaning devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects

Abstract

The invention belongs to the field of health protection, in particular to an auxiliary device utilizing a track frame, which aims at solving the problems that the prior art still can not clean a blackboard well and easily causes students and teachers to be infected with diseases, and provides the following scheme, which comprises a blackboard, wherein the top of the blackboard is fixedly connected with a fixed seat, the bottom of the fixed seat is provided with a fixed groove, the top of the fixed groove is provided with a mounting groove, the inner wall of one side of the mounting groove is fixedly connected with a push rod motor, the ball screw is rotatably connected on the inner wall of one side of the fixed groove, the invention has reasonable structure and simple operation, the blackboard surface can be cleaned quickly and cleanly through the micro water pump, the air heater and the push rod motor, the chalk dust is prevented from falling into the nasal cavities of teachers and students, the infection of the respiratory tract protects the health of teachers and students, and can also avoid blackboards which are not enough for short students to reach.

Description

Auxiliary device utilizing track rack
Technical Field
The invention relates to the technical field of health protection, in particular to an auxiliary device utilizing a track rack.
Background
In recent years, with the breakthrough of scientists in various fields, computers and mechanical devices are combined and applied to daily life, the lives of those people provide great convenience, and more places, whether agricultural or industrial, start to use mechanized work, but more and more people start to pay attention to health problems, particularly of children, in daily study and life, the blackboard erasing is one of necessary lessons, as the quality of the chalk is poor and the dust is too much, the respiratory tract and the lung of students and teachers are infected with some dust, and the students and teachers can be infected with some diseases over time, since the dusts are granular, when the blackboard eraser is erased, the blackboard eraser is scattered in the air, more students are in a classroom, the air is not smooth, and most of the dusts from the chalk enter the nasal cavities of teachers and students.
The prior art still can not clean the blackboard well, makes students and teachers easily infect some diseases, so we propose an auxiliary device using a rail frame to solve the above-mentioned problems.
Disclosure of Invention
The invention aims to solve the defects that in the prior art, a blackboard still cannot be cleaned well, and students and teachers are prone to infecting some diseases.
In order to achieve the purpose, the invention adopts the following technical scheme:
an auxiliary device utilizing a track rack comprises a blackboard, wherein the top of the blackboard is fixedly connected with a fixed seat, the bottom of the fixed seat is provided with a fixed groove, the top of the fixed groove is provided with a mounting groove, the inner wall of one side of the mounting groove is fixedly connected with a push rod motor, the inner wall of one side of the fixed groove is rotatably connected with a ball screw, the ball screw is in threaded connection with a screw nut, the top of the screw nut extends into the mounting groove and is in sliding connection with the inner wall of the top of the mounting groove, the output shaft of the push rod motor is fixedly connected with one side of the screw nut, the ball screw is in transmission connection with a rotating shaft, the top of the rotating shaft is in rotating connection with the inner wall of the top of the fixed groove, a reel is fixedly sleeved on the rotating shaft, the utility model discloses a blackboard, including sliding plate, fixed slot, fixed connection, clean brush, collection box, the fixed slot is extended to the bottom of sliding plate and the clean brush of fixedly connected with, the surface of clean brush and blackboard closely laminates, one end of stay cord and one side fixed connection of sliding plate, be equipped with on the blackboard and wash subassembly and stoving subassembly, the bottom fixedly connected with collecting box of blackboard, the sealed fixedly connected with blow off pipe in one side of collecting box is equipped with the blowoff valve on the blow off pipe, through washing subassembly, stoving subassembly and push rod motor clearance blackboard face that can be clean fast, avoids the chalk dust to fall into mr student's nasal cavity, infects the respiratory track and has protected teachers and students's health, also can avoid the blackboard that has the classmate.
Preferably, the cleaning assembly comprises a fixed frame which is slidably connected to one side of the blackboard, the bottom of the fixed frame is fixedly connected with a micro water pump, one side of the fixed frame is fixedly connected with a water tank, the top of the water tank is provided with a water inlet, the input end of the micro water pump extends into the water tank, the output end of the micro water pump is fixedly connected with a water spray pipe in a sealing manner, one side of the blackboard is fixedly connected with a support plate, the top of the support plate is fixedly connected with an electric telescopic rod, one end of the electric telescopic rod is fixedly connected with the top of the fixed frame, the drying assembly comprises a hot air blower which is fixedly connected to the other side of the sliding plate, water in the water tank can be sprayed on the blackboard through the micro water pump, meanwhile, the spraying area can be wider through the action of the electric telescopic rod, water, meanwhile, the blackboard can be dried quickly through the air heater, and the blackboard is convenient to use next time.
Preferably, the opposite side of collecting box is equipped with the chamber door, the equal sliding connection in top and the bottom of chamber door has the bayonet lock, two draw-in grooves have been seted up to the opposite side symmetry of collecting box, the bayonet lock clamps with the draw-in groove mutually, through sliding the bayonet lock, makes the bayonet lock break away from clamping of draw-in groove, and then can open the chamber door, conveniently clears up convenient and fast inside the collecting box.
Preferably, the inner wall of the other side of the fixed groove is symmetrically and fixedly connected with two springs, one ends of the two springs are fixedly connected with the other side of the sliding plate, and the two springs are arranged to provide reset power for the sliding plate.
Preferably, the other end of the ball screw and the rotating shaft are fixedly sleeved with bevel gears, the two bevel gears are meshed with each other, and the bevel gears are arranged to provide power for the rotating shaft.
According to the auxiliary device utilizing the track rack, due to the fact that the micro water pump is arranged, water in the water tank can be sprayed on the blackboard through the micro water pump, meanwhile, the spraying area can be wider under the action of the electric telescopic rod, and the fact that the water can be sprayed on the blackboard is guaranteed, so that chalk dust is prevented from scattering in the air, meanwhile, the blackboard can be quickly dried through the air heater, the auxiliary device is convenient to use next time, the collecting box can collect sewage flowing down from the blackboard, a classroom is prevented from being polluted, the box door is arranged, the interior of the collecting box can be conveniently cleaned, and the auxiliary device is convenient and fast.
Owing to set up the push rod motor, the push rod motor can make lead screw nut horizontal reciprocating motion for ball drives the pivot reciprocating rotation, can make the wire winding wheel to pull rope and reciprocate to tighten up and release, and then can make the sliding plate drive the cleaning brush and carry out horizontal reciprocating motion, makes the cleanness to the blackboard more thorough, and can make the air heater can horizontal reciprocating motion, convenient drying.
The blackboard cleaning machine is reasonable in structure and simple to operate, can quickly and cleanly clean the blackboard surface through the micro water pump, the air heater and the push rod motor, prevents chalk dust from falling into nasal cavities of teachers and students, infects respiratory tracts, protects the health of the teachers and the students, and can also prevent a plurality of short blackboards which cannot be reached by students.
Drawings
Fig. 1 is a front view schematically illustrating an auxiliary device using a track frame according to the present invention;
fig. 2 is a schematic cross-sectional view illustrating a fixing seat of an auxiliary device using a track frame according to the present invention;
FIG. 3 is a schematic diagram of a three-dimensional structure of a cleaning brush using an auxiliary device of a track frame according to the present invention;
fig. 4 is an enlarged view of a portion a of an auxiliary device using a rail housing according to the present invention.
In the figure: the blackboard comprises a blackboard 1, a fixing seat 2, a fixing groove 3, a mounting groove 4, a push rod motor 5, a ball screw 6, a screw nut 7, a rotating shaft 8, a reel 9, a sliding plate 10, a cleaning brush 11, a fixing frame 12, a water tank 13, a miniature water pump 14, an electric telescopic rod 15, a collecting box 16, a box door 17, a bayonet pin 18, a spring 19, an air heater 20 and a bevel gear 21.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example one
Referring to fig. 1-4, an auxiliary device using a track rack comprises a blackboard 1, wherein a fixed seat 2 is fixedly connected to the top of the blackboard 1, a fixed groove 3 is formed at the bottom of the fixed seat 2, a mounting groove 4 is formed at the top of the fixed groove 3, a push rod motor 5 is fixedly connected to one side inner wall of the mounting groove 4, a ball screw 6 is rotatably connected to one side inner wall of the fixed groove 3, a screw nut 7 is threadedly connected to the ball screw 6, the top of the screw nut 7 extends into the mounting groove 4 and is slidably connected to the top inner wall of the mounting groove 4, an output shaft of the push rod motor 5 is fixedly connected to one side of the screw nut 7, a rotating shaft 8 is rotatably connected to the ball screw 6, the top end of the rotating shaft 8 is rotatably connected to the top inner wall of the fixed groove 3, a reel 9 is fixedly sleeved on the rotating, the bottom of the sliding plate 10 extends out of the fixed groove 3 and is fixedly connected with a cleaning brush 11, the cleaning brush 11 is tightly attached to the surface of the blackboard 1, one end of the pull rope is fixedly connected with one side of the sliding plate 10, the blackboard 1 is provided with a cleaning assembly and a drying assembly, the bottom of the blackboard 1 is fixedly connected with a collecting box 16, one side of the collecting box 16 is fixedly connected with a drain pipe in a sealing mode, and the drain pipe is provided with a drain valve.
According to the invention, the cleaning assembly comprises a fixing frame 12 which is slidably connected to one side of the blackboard 1, a miniature water pump 14 is fixedly connected to the bottom of the fixing frame 12, a water tank 13 is fixedly connected to one side of the fixing frame 12, a water inlet is formed in the top of the water tank 13, the input end of the miniature water pump 14 extends into the water tank 13, a water spray pipe is fixedly connected to the output end of the miniature water pump 14 in a sealing mode, a supporting plate is fixedly connected to one side of the blackboard 1, an electric telescopic rod 15 is fixedly connected to the top of the supporting plate, one end of the electric telescopic rod 15 is fixedly connected with the top of the.
In the invention, a box door 17 is arranged on the other side of the collecting box 16, the top and the bottom of the box door 17 are both connected with clamping pins 18 in a sliding manner, two clamping grooves are symmetrically formed in the other side of the collecting box 16, and the clamping pins 18 are clamped with the clamping grooves.
In the invention, two springs 19 are symmetrically and fixedly connected to the inner wall of the other side of the fixed groove 3, and one ends of the two springs 19 are fixedly connected to the other side of the sliding plate 10.
In the invention, bevel gears 21 are fixedly sleeved on the other end of the ball screw 6 and the rotating shaft 8, and the two bevel gears 21 are meshed.
Example two
Referring to fig. 1-4, an auxiliary device using a track rack comprises a blackboard 1, wherein a fixed seat 2 is welded on the top of the blackboard 1, a fixed groove 3 is formed at the bottom of the fixed seat 2, a mounting groove 4 is formed at the top of the fixed groove 3, a push rod motor 5 is welded on one side inner wall of the mounting groove 4, a ball screw 6 is rotatably connected on one side inner wall of the fixed groove 3, a screw nut 7 is connected on the ball screw 6 in a threaded manner, the top of the screw nut 7 extends into the mounting groove 4 and is slidably connected with the top inner wall of the mounting groove 4, an output shaft of the push rod motor 5 is welded with one side of the screw nut 7, a rotating shaft 8 is rotatably connected on the ball screw 6, the top end of the rotating shaft 8 is rotatably connected with the top inner wall of the fixed groove 3, a reel 9 is fixedly sleeved on, the bottom of the sliding plate 10 extends out of the fixed groove 3 and is welded with the cleaning brush 11, the cleaning brush 11 is tightly attached to the surface of the blackboard 1, one end of the pull rope is bonded with one side of the sliding plate 10, the blackboard 1 is provided with a cleaning component and a drying component, the bottom of the blackboard 1 is welded with the collecting box 16, one side of the collecting box 16 is hermetically welded with a drain pipe, the drain pipe is provided with a drain valve, the blackboard surface can be cleaned quickly and cleanly through the cleaning component, the drying component and the push rod motor 5, chalk dust is prevented from falling into the nasal cavity of teachers and students, respiratory infection is avoided, the health of teachers and students is protected, the blackboard 1 which is short enough to students can be avoided, the defects in the prior art are overcome, due to the arrangement of the micro water pump 14, the micro water pump 14 can spray water in the water tank 13 on the blackboard 1, meanwhile, the spraying area can be wider under the, the blackboard 1 can be ensured to be sprayed with water, so that chalk dust can be prevented from scattering in the air, meanwhile, the blackboard 1 can be quickly dried through the air heater 20, the blackboard is convenient to use next time, the collection box 16 can collect sewage flowing down from the blackboard 1 so as to avoid polluting classrooms, meanwhile, the box door 17 is arranged so as to conveniently clean the inside of the collection box 16, and the blackboard is convenient and quick to use, and due to the fact that the push rod motor 5 is arranged, the push rod motor 5 can enable the lead screw nut 7 to transversely reciprocate, the ball screw 6 drives the rotating shaft 8 to reciprocate, the pull rope can be repeatedly tightened and released through the winding wheel 9, the sliding plate 10 can further drive the cleaning brush 11 to transversely reciprocate, the blackboard 1 can be cleaned more thoroughly, the air heater 20 can transversely reciprocate and drying is convenient, the blackboard cleaning machine is reasonable in structure and simple to operate, and the miniature water pump 14 can be used for preventing, The clear up blackboard face that air heater 20 and push rod motor 5 can be clean fast avoids the chalk dust to fall into mr student's nasal cavity, infects the respiratory tract and has protected teacher student's health, also can avoid the blackboard 1 that a little short classmates can not reach above.
In the invention, the cleaning component comprises a fixed frame 12 connected with one side of the blackboard 1 in a sliding way, a micro water pump 14 is welded at the bottom of the fixed frame 12, a water tank 13 is welded at one side of the fixed frame 12, a water inlet is arranged at the top of the water tank 13, the input end of the micro water pump 14 extends into the water tank 13, a spray pipe is welded at the output end of the micro water pump 14 in a sealing way, a support plate is welded at one side of the blackboard 1, an electric telescopic rod 15 is welded at the top of the support plate, one end of the electric telescopic rod 15 is welded with the top of the fixed frame 12, the drying component comprises a hot air blower 20 welded at the other side of the sliding plate 10, water in the water tank 13 can be sprayed on the blackboard 1 through the micro water pump 14, meanwhile, the spraying area can be wider through the action of the electric telescopic rod 15, the water can be ensured to be, the next use is convenient.
In the invention, the box door 17 is arranged on the other side of the collecting box 16, the clamping pins 18 are connected to the top and the bottom of the box door 17 in a sliding manner, the two clamping grooves are symmetrically formed in the other side of the collecting box 16, the clamping pins 18 are clamped with the clamping grooves, the clamping pins 18 are separated from the clamping grooves by sliding the clamping pins 18, the box door 17 can be opened, the interior of the collecting box 16 can be cleaned conveniently, and the operation is convenient and rapid.
In the invention, two springs 19 are symmetrically welded on the inner wall of the other side of the fixed groove 3, one ends of the two springs 19 are welded with the other side of the sliding plate 10, and the two springs 19 are arranged to provide reset power for the sliding plate 10.
In the invention, bevel gears 21 are fixedly sleeved on the other end of the ball screw 6 and the rotating shaft 8, the two bevel gears 21 are meshed, and the bevel gears 21 are arranged to provide power for the rotating shaft 8.
In the invention, the push rod motor 5, the micro water pump 14, the electric telescopic rod 15 and the air heater 20 in the technical scheme are controlled by an external controller and are powered by the storage battery, when the blackboard 1 needs to be cleaned, the micro water pump 14 and the electric telescopic rod 15 are started firstly, the micro water pump 14 pumps water in the water tank 13 out and sprays the water on the blackboard 1 through the water spray pipe to enable the electric telescopic rod 15 to stretch back and forth, so that the water spray pipe can move up and down, the spraying area is wider, the water can be sprayed on the blackboard 1, the chalk dust can be prevented from scattering in the air, then the push rod motor 5 is started to enable the push rod motor 5 to push back and forth, and further the lead screw nut 7 can reciprocate left and right, and the lead screw nut 7 is in threaded connection with the ball screw 6, so the lead screw nut 7 reciprocates to enable the ball screw 6 to rotate back and forth, the ball screw 6 rotates in a reciprocating way to drive the rotating shaft 8 to rotate in a reciprocating way through the two bevel gears 21, so that the pull rope can be tightened and released in a reciprocating way through the reel 9, the sliding plate 10 can move in a transverse reciprocating way, the sliding plate 10 can move in a reciprocating way left and right to clean the blackboard 1 thoroughly, the cleaning brush 11 is cylindrical, the cleaning area is wider, the cleaning effect is good, the hot air blower 20 is started at the same time, the hot air blower 20 can blow hot air to the blackboard 1, the blackboard 1 can be dried quickly for the next use, meanwhile, the collection box 16 can collect sewage flowing down from the blackboard 1 to avoid pollution in a classroom, the sewage can be discharged through the sewage discharge pipe, the bayonet pin 18 can slide to separate the bayonet pin 18 from clamping of the clamping groove, the box door 17 can be opened, and the inside of the collection box 16 can be cleaned conveniently, is convenient and quick.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (5)

1. The auxiliary device comprises a blackboard (1) and is characterized in that a fixing seat (2) is fixedly connected to the top of the blackboard (1), a fixing groove (3) is formed in the bottom of the fixing seat (2), a mounting groove (4) is formed in the top of the fixing groove (3), a push rod motor (5) is fixedly connected to the inner wall of one side of the mounting groove (4), a ball screw (6) is rotatably connected to the inner wall of one side of the fixing groove (3), a screw nut (7) is connected to the ball screw (6) in a threaded manner, the top of the screw nut (7) extends into the mounting groove (4) and is in sliding connection with the inner wall of the top of the mounting groove (4), an output shaft of the push rod motor (5) is fixedly connected to one side of the screw nut (7), and a rotating shaft (8) is connected to the ball screw (6), the top of pivot (8) is connected with the top inner wall rotation of fixed slot (3), fixed cover is equipped with reel (9) on pivot (8), around being equipped with the stay cord on reel (9), the top sliding connection of fixed slot (3) has sliding plate (10), the bottom of sliding plate (10) extends fixed slot (3) interior and fixedly connected with cleaning brush (11), closely laminate on the surface of cleaning brush (11) and blackboard (1), one end of stay cord and one side fixed connection of sliding plate (10), be equipped with washing subassembly and stoving subassembly on blackboard (1), the bottom fixedly connected with collecting box (16) of blackboard (1), the sealed fixedly connected with blow off pipe in one side of collecting box (16), be equipped with the blowoff valve on the blow off pipe.
2. An auxiliary device using a rail housing as claimed in claim 1, the cleaning component comprises a fixed frame (12) which is connected with one side of the blackboard (1) in a sliding way, the bottom of the fixed frame (12) is fixedly connected with a micro water pump (14), one side of the fixed frame (12) is fixedly connected with a water tank (13), the top of the water tank (13) is provided with a water inlet, the input end of the micro water pump (14) extends into the water tank (13), the output end of the micro water pump (14) is fixedly connected with a spray pipe in a sealing way, one side of the blackboard (1) is fixedly connected with a supporting plate, the top of the supporting plate is fixedly connected with an electric telescopic rod (15), one end of the electric telescopic rod (15) is fixedly connected with the top of the fixed frame (12), the drying component comprises a hot air blower (20) fixedly connected to the other side of the sliding plate (10).
3. The auxiliary device using the rail rack as claimed in claim 1, wherein a box door (17) is provided at the other side of the collection box (16), bayonet locks (18) are slidably connected to the top and the bottom of the box door (17), two locking slots are symmetrically provided at the other side of the collection box (16), and the bayonet locks (18) are locked with the locking slots.
4. An auxiliary device using a track frame as claimed in claim 1, wherein two springs (19) are symmetrically and fixedly connected to the inner wall of the other side of the fixing groove (3), and one end of each of the two springs (19) is fixedly connected to the other side of the sliding plate (10).
5. An auxiliary device using a track frame as claimed in claim 1, wherein the other end of the ball screw (6) and the rotating shaft (8) are both fixedly sleeved with a bevel gear (21), and the two bevel gears (21) are engaged.
CN201911254436.2A 2019-12-10 2019-12-10 Auxiliary device utilizing track rack Pending CN110843384A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911254436.2A CN110843384A (en) 2019-12-10 2019-12-10 Auxiliary device utilizing track rack

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911254436.2A CN110843384A (en) 2019-12-10 2019-12-10 Auxiliary device utilizing track rack

Publications (1)

Publication Number Publication Date
CN110843384A true CN110843384A (en) 2020-02-28

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ID=69608409

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911254436.2A Pending CN110843384A (en) 2019-12-10 2019-12-10 Auxiliary device utilizing track rack

Country Status (1)

Country Link
CN (1) CN110843384A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112123975A (en) * 2020-10-20 2020-12-25 宿迁学院 Electrician electronic class teaching device
CN112605031A (en) * 2020-12-01 2021-04-06 重庆小梦拉科技有限公司 Gastroscope cleaning and sterilizing device for gastroenterology department
CN114454645A (en) * 2022-02-28 2022-05-10 杨慧华 Think political affairs education with little blackboard convenient to use

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112123975A (en) * 2020-10-20 2020-12-25 宿迁学院 Electrician electronic class teaching device
CN112605031A (en) * 2020-12-01 2021-04-06 重庆小梦拉科技有限公司 Gastroscope cleaning and sterilizing device for gastroenterology department
CN114454645A (en) * 2022-02-28 2022-05-10 杨慧华 Think political affairs education with little blackboard convenient to use

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