CN215153479U

CN215153479U - Automatic blackboard eraser

Info

Publication number: CN215153479U
Application number: CN202121190191.4U
Authority: CN
Inventors: 袁静; 李春波; 万宇浪; 高重鸣; 章磊; 殷志成
Original assignee: Hubei Engineering University
Current assignee: Hubei Engineering University
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2021-12-14
Anticipated expiration: 2031-05-31

Abstract

The utility model discloses an automatic blackboard eraser, including being located the positive blackboard eraser main part of blackboard, still include: the blackboard eraser lifting device is used for driving the blackboard eraser main body to vertically move along the up-down direction of a blackboard, and comprises a support frame and a driving mechanism for driving the support frame to move up and down, wherein the blackboard eraser main body is arranged on the support frame; the blackboard eraser advancing and retreating device is used for driving the blackboard eraser main body to advance and retreat towards the front direction of a blackboard, is arranged on the supporting frame and moves up and down along with the blackboard eraser main body; the blackboard eraser body is internally provided with a dust collecting chamber and a dust collecting box which are used for collecting chalk dust generated when the blackboard eraser body erases a blackboard. The utility model discloses a PLC control motor drives driving belt, lead screw and carries out transmission and drive the blackboard eraser from top to bottom, the back-and-forth movement, realizes functions such as automatic blackboard eraser start, stop, reset through PLC to through gravity dust fall's principle, collect the dust collection box with absorptive chalk dust.

Description

Automatic blackboard eraser

Technical Field

The utility model relates to a teaching tool's technical field especially relates to an automatic blackboard eraser, is applied to among the classroom.

Background

Along with the development of society, the education mode is also changing day by day, from traditional blackboard-writing classroom to present multimedia, audio-video class classroom, can be said to be rich and varied. At present, the teaching aid is still the traditional blackboard eraser in the teaching, when whenever wiping the blackboard, wastes time and energy, is difficult to wipe to clean produced chalk dust can bring very big influence for teachers and students' health and the neatness in classroom.

At present, most of the research on the blackboard eraser is stopped at a theory, the application of the blackboard eraser is few and few in practice, the blackboard eraser improves the blackboard erasing and chalk dust collecting modes, some blackboard erasers are added with a dust sensor device to realize automatic identification erasing, but when the whole blackboard is faced, the blackboard eraser cannot identify the part needing to be erased and the part needing not to be erased, and certain defects exist; the blackboard eraser is designed based on the electrostatic dust removal principle and consists of two parts, namely a discharge electrode connected with a negative electrode of a power supply and a plate electrode of a grounding wire, wherein the discharge electrode is uniformly arranged between the plate electrodes, and the collection and removal of chalk dust can be carried out by applying negative direct-current high voltage on the discharge electrode, but the realization of the device is complicated and difficult.

SUMMERY OF THE UTILITY MODEL

The drawback brought to traditional blackboard eraser, the utility model aims to solve the technical problem that an automatic blackboard eraser is provided, simple structure can carry out the automation to the blackboard from top to bottom and clean, has alleviateed teachers and students' burden, has still practiced thrift valuable classroom time to produced chalk dust when can collecting and clean.

In order to achieve the above object, the utility model provides an automatic blackboard eraser, including being located the positive blackboard eraser main part of blackboard, still include: the blackboard eraser lifting device is used for driving the blackboard eraser main body to vertically move along the up-down direction of a blackboard, and comprises a support frame and a driving mechanism for driving the support frame to move up and down, wherein the blackboard eraser main body is arranged on the support frame; the blackboard eraser advancing and retreating device is used for driving the blackboard eraser main body to advance and retreat towards the front direction of a blackboard, is arranged on the supporting frame and moves up and down along with the blackboard eraser main body; the blackboard eraser body is internally provided with a dust collecting chamber and a dust collecting box which are used for collecting chalk dust generated when the blackboard eraser body erases a blackboard.

Preferably, the driving mechanism comprises a stepping motor fixed at the top of the blackboard, a transmission shaft connected with an output shaft of the stepping motor, a first belt pulley sleeved and fixed on the transmission shaft, and a second belt pulley positioned right below the first belt pulley and arranged below the blackboard; the transmission is connected with driving belt between first belt pulley and the second belt pulley, support frame and driving belt fixed connection to reciprocate under driving belt's drive.

Further, the blackboard eraser driving and reversing device comprises a sliding rail fixed on the supporting frame, a sliding block connected with the sliding rail in a sliding mode, and a lead screw penetrating through the sliding block and connected with the sliding block in a threaded mode, and the lead screw is driven by a motor to rotate; the blackboard eraser main body is fixedly connected to the sliding block and is driven by the sliding block to move forward and backward.

Preferably, one surface of the blackboard eraser main body, which is close to the blackboard, is provided with a wiping felt, a filter screen is arranged in the dust collection chamber, which is close to the wiping felt, and herringbone plates which are arranged in a matrix manner are arranged in the dust collection chamber; the dust collecting box is positioned below the dust collecting chamber, and a dust collecting fan is arranged on the dust collecting chamber.

Further, the both sides of blackboard are equipped with the optical axis of vertical setting, sliding connection has first linear bearing on the optical axis, the both ends of support frame pass through the connecting plate with first linear bearing fixed connection.

Furthermore, the number of the blackboard eraser advancing and retreating devices is two, and the two blackboard eraser advancing and retreating devices are respectively positioned at two ends of the blackboard eraser main body; the two ends of the blackboard eraser main body are fixedly connected with the sliding block through supporting plates.

Optionally, a guide assembly is arranged on the support frame between the two blackboard eraser advancing and retracting devices, the guide assembly comprises a guide rod fixed on the support frame through a bearing seat and a second linear bearing in sliding connection with the guide rod, and the guide rod is arranged perpendicular to the front face of the blackboard; the bottom of the blackboard eraser main body is fixed on the second linear bearing.

Furthermore, the number of the first belt pulleys and the number of the second belt pulleys are two, and the first belt pulleys and the second belt pulleys are respectively positioned on two sides of the blackboard; the transmission belt is connected with the connecting plate through a hanging ring.

Compared with the prior art, the beneficial effects of the utility model are as follows:

the utility model discloses an automatic blackboard eraser's simple structure has chooseed suitable drive, transmission and reasonable wiping mechanism for use in order to reach the cleaning and the dust collection purpose of automatic blackboard eraser, has reduced teachers and students' daily work, has brought the guarantee to the health of health and the clean and tidy in classroom. The PLC is used for controlling the motor to drive the transmission belt and the lead screw to drive the blackboard eraser to move up and down and back and forth, functions of starting, stopping, resetting and the like of the automatic blackboard eraser are achieved through the PLC, and absorbed chalk dust is collected into the dust collection box through the gravity dust fall principle and is cleaned regularly.

Additionally, the utility model discloses an automatic blackboard eraser has one set of dust absorption collection dirt device, and the chalk dust that produces during the wiping is under dust absorption fan's effect, and the dust collecting box is finally collected to the room that falls through foraminiferous felt entering, and this is a guarantee to teachers and students' health, has created good classroom learning environment moreover. The utility model can realize the up-down automatic wiping function, saves time and labor, is convenient and fast, can automatically wipe the blackboard, lightens the burden of teachers and students, ensures the health of teachers and students, and saves the valuable classroom time; the chalk dust collecting device is arranged, and the influence of the chalk dust on the health of teachers and students and the tidiness of classrooms is avoided.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of the automatic blackboard eraser of the present invention;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;

fig. 3 is a schematic structural view of the support frame, the blackboard eraser advancing and retreating device mounted on the support frame, and the guide assembly of the present invention;

FIG. 4 is an enlarged view of the structure at B in FIG. 3;

fig. 5 is a schematic structural view of the blackboard eraser main body of the present invention;

FIG. 6 is a schematic view of the internal structure of the dust collecting chamber of the blackboard eraser body;

FIG. 7 is a side view of the dust collecting chamber of the blackboard eraser body;

fig. 8 is a flowchart illustrating the operation of the automatic blackboard eraser of the present invention.

The reference numbers in the figures illustrate:

1. a first bearing housing; 2. a first pulley; 3. a drive shaft; 4. a coupling; 5. a first decelerator; 6. a stepping motor; 7. a second bearing housing; 8. an optical axis; 9. a drive belt; 10. a blackboard eraser main body; 11. a support frame; 12. a motor; 13. a connecting member; 14. a hoisting ring; 15. a first linear bearing; 16. a second pulley; 17. a second linear bearing; 18. a guide bar; 19. a third bearing seat; 20. a connecting rod; 21. a second decelerator; 22. a lead screw; 23. a slider; 24. a support plate; 25. a slide rail; 26. wiping felt; 27. filtering with a screen; 28. a herringbone plate; 29. a dust collecting box; 30. dust collection fan.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

The automatic blackboard eraser of the present invention will be described in detail with reference to fig. 1 to 8.

The automatic blackboard eraser of the utility model comprises a blackboard eraser main body 10, wherein the blackboard eraser main body 10 is positioned on the front surface of the blackboard so as to clean chalk writing on the blackboard.

The blackboard eraser body 10 is mounted on a support frame 11 composed of a square frame, and the support frame 11 is positioned on the front face of the blackboard. The wall surfaces on two sides of the blackboard are fixedly provided with vertically arranged optical shafts 8 through second bearing seats 7, the optical shafts 8 are connected with first linear bearings 15 in a sliding mode, and two ends of the supporting frame 11 are fixedly connected with the first linear bearings 15 located on two sides of the blackboard through connecting plates 13. The connecting plate 13 is L-shaped, and has a horizontal portion fixedly connected to an end of the supporting frame 11 and a vertical portion fixedly connected to the first linear bearing 15, so that when the first linear bearing 15 moves on the optical axis 8, the supporting frame 11 and the blackboard eraser body 10 can be driven to move up and down.

In addition, a transmission shaft 3 horizontally arranged is installed at the top of the blackboard through a first bearing seat 1, two ends of the transmission shaft 3 are respectively connected with a stepping motor 6 through a coupler 4 and a first speed reducer 5, two first belt pulleys 2 rotating along with the transmission shaft 3 are fixed at two ends of the transmission shaft 3, the two first belt pulleys 2 are respectively located at two sides of the blackboard, a second belt pulley 16 is fixed under the first belt pulley 2, and the two second belt pulleys 16 are fixed below the blackboard. A transmission belt 9 is connected between the first belt pulley 2 and the second belt pulley 16 in a transmission way, and the transmission belt 9 is connected with the connecting plate 13 through a hanging ring 14. The transmission belt 9 is preferably a toothed belt, and the first belt pulley 2 and the second belt pulley 16 are toothed belt pulleys engaged with the toothed belt, so that the friction force between the transmission belt and the belt pulleys is increased, and the support frame 11 is prevented from sliding when moving up and down. The stepping motor 6 drives the transmission shaft 3 to rotate, drives the first belt pulley 2 to rotate at the same time, and drives the connecting plate 13 and the first linear bearing 15 to move along the optical axis 8 through the transmission belt 9, so as to drive the support frame 11 and the blackboard eraser main body 10 to move up and down.

Above-mentioned step motor 6, transmission shaft 3, first belt pulley 2, second belt pulley 16 and driving belt 9 constitute the utility model discloses an actuating mechanism for drive support frame 11 reciprocates. The driving mechanism and the supporting frame 11 form a blackboard eraser lifting device, and drive the blackboard eraser main body 10 to vertically move along the up-down direction of the blackboard.

As shown in fig. 3 and 4, a blackboard eraser advancing and retreating device which moves up and down together with the blackboard eraser body 10 is mounted on the support frame 11, specifically, the blackboard eraser advancing and retreating device comprises a slide rail 25 fixed on the support frame 11, a slide block 23 connected with the slide rail 25 in a sliding manner, and a lead screw 22 penetrating through the slide block 23 and in threaded connection with the slide block 23, the slide rail 25 is arranged perpendicular to the front surface of the blackboard, the lead screw 22 is driven by a motor 12 and a second speed reducer 21 to rotate, and the blackboard eraser body 10 is fixedly connected to the slide block 23 and is driven by the slide block 23 to advance and retreat. The number of the blackboard eraser advancing and retreating devices is two, the blackboard eraser advancing and retreating devices are respectively positioned at two ends of the blackboard eraser main body 10, and two ends of the blackboard eraser main body 10 are fixedly connected with the sliding block 23 through the supporting plate 24. The motor 12 drives the lead screw 22 to rotate, and the rotation between the lead screw 22 and the slider 23 is converted into the linear motion of the slider 23, so that the slider 23 moves forward and backward in the front direction of the blackboard under the driving of the motor 12.

In order to ensure the stability of the forward and backward movement of the blackboard eraser body 10, a guide assembly is arranged on the support frame 11 between the two blackboard eraser forward and backward devices, the guide assembly comprises a guide rod 18 fixed on the support frame 11 through a third bearing seat 19 and a second linear bearing 17 connected with the guide rod 18 in a sliding manner, two ends of the third bearing seat 19 are connected with the motors 12 at two ends through a connecting rod 20, and the guide rod 18 is parallel to the slide rail 25 and is arranged perpendicular to the front surface of the blackboard. The bottom of the blackboard eraser body 10 is fixed to a second linear bearing 17. The second linear bearing 17 and the support plate 25 serve as support members of the blackboard eraser body 10, and drive the blackboard eraser body 10 to move forward and backward in the front direction of the blackboard.

In the present invention, a dust collecting chamber and a dust collecting box 29 are provided in the blackboard eraser body 10 for collecting chalk dust generated when the blackboard eraser body wipes a blackboard. One side of the blackboard eraser main body 10 close to the blackboard is provided with a wiping felt 26, a filter screen 27 is arranged in a dust collection chamber close to the wiping felt 26, herringbone plates 28 which are arranged in a matrix mode are arranged in the dust collection chamber, a dust collection box 29 is positioned below the dust collection chamber, the herringbone plates 28 can accelerate dust fall, chalk dust finally enters the dust collection box 29, and a dust collection fan 30 is arranged on the dust collection chamber.

The use of the automatic blackboard eraser of the present invention is described below with reference to fig. 1 to 8 in combination with the above description of the structural features:

when the blackboard eraser works, the switch is pressed down to switch on the power supply, the output shaft of the stepping motor 6 rotates forwards, the transmission shaft 3 and the first belt pulley 2 are driven to rotate through the coupler 4 and the first speed reducer 5, and the support frame 11 and the blackboard eraser main body 10 are driven to move up and down through the transmission belt 9 under the matching of the second belt pulley 16. When the blackboard eraser moves to the edge above the blackboard, the motor 12 starts to rotate forwards, so that the sliding block 23, the supporting plate 24 and the blackboard eraser main body 10 move forwards under the action of the screw rod 22 until the sliding block, the supporting plate and the blackboard eraser main body are attached to the blackboard and reach a certain pre-pressure, at the moment, the dust collection fan 30 with the motor starts to rotate, chalk dust generated by wiping is collected into a dust collection chamber, the blackboard eraser wipes the whole blackboard from top to bottom, after the wiping is finished, the dust collection fan 30 with the motor stops working, the motor 12 and the stepping motor 6 start to rotate backwards, and the blackboard eraser returns to the initial position.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can understand that the changes or substitutions obtained within the technical scope of the present invention should be covered within the scope of the present invention.

Claims

1. The utility model provides an automatic blackboard eraser, is including being located the blackboard eraser main part that the blackboard is positive, its characterized in that: further comprising:

the blackboard eraser lifting device is used for driving the blackboard eraser main body to vertically move along the up-down direction of a blackboard, and comprises a support frame and a driving mechanism for driving the support frame to move up and down, wherein the blackboard eraser main body is arranged on the support frame;

the blackboard eraser advancing and retreating device is used for driving the blackboard eraser main body to advance and retreat towards the front direction of a blackboard, is arranged on the supporting frame and moves up and down along with the blackboard eraser main body;

the blackboard eraser body is internally provided with a dust collecting chamber and a dust collecting box which are used for collecting chalk dust generated when the blackboard eraser body erases a blackboard.

2. The automatic blackboard eraser according to claim 1, wherein the driving mechanism comprises a stepping motor fixed on the top of the blackboard, a transmission shaft connected with an output shaft of the stepping motor, a first belt pulley fixed on the transmission shaft in a sleeving manner, and a second belt pulley located right below the first belt pulley and placed below the blackboard;

the transmission is connected with driving belt between first belt pulley and the second belt pulley, support frame and driving belt fixed connection to reciprocate under driving belt's drive.

3. The automatic blackboard eraser according to claim 1, wherein the blackboard eraser driving and reversing device comprises a sliding rail fixed on the supporting frame, a sliding block slidably connected with the sliding rail, and a lead screw passing through the sliding block and threadedly connected with the sliding block, the lead screw being driven by a motor to rotate;

the blackboard eraser main body is fixedly connected to the sliding block and is driven by the sliding block to move forward and backward.

4. The automatic blackboard eraser according to claim 1, wherein one side of the blackboard eraser body close to the blackboard is a wiping felt, a filter screen is arranged in the dust collection chamber close to the wiping felt, and herringbone plates arranged in a matrix are arranged in the dust collection chamber;

the dust collecting box is positioned below the dust collecting chamber, and a dust collecting fan is arranged on the dust collecting chamber.

5. The automatic blackboard eraser according to claim 2, wherein vertically arranged optical axes are arranged on two sides of the blackboard, a first linear bearing is slidably connected to the optical axes, and two ends of the supporting frame are fixedly connected with the first linear bearing through connecting plates.

6. The automatic blackboard eraser according to claim 3, wherein the number of the blackboard eraser advancing and retracting devices is two and the two blackboard eraser advancing and retracting devices are respectively positioned at two ends of the blackboard eraser body;

the two ends of the blackboard eraser main body are fixedly connected with the sliding block through supporting plates.

7. The automatic blackboard eraser according to claim 6, wherein a guide assembly is provided on the support frame between the two blackboard eraser advancing and retracting devices, the guide assembly comprises a guide rod fixed on the support frame through a bearing seat, and a second linear bearing slidably connected with the guide rod, the guide rod is disposed perpendicular to the front surface of the blackboard;

the bottom of the blackboard eraser main body is fixed on the second linear bearing.

8. The automatic blackboard eraser according to claim 5, wherein the number of the first belt pulley and the second belt pulley is two and are respectively located on both sides of the blackboard; the transmission belt is connected with the connecting plate through a hanging ring.