CN113002226A - Teaching tool - Google Patents

Abstract

The invention relates to the technical field of teaching aids, in particular to a teaching tool, which comprises: a support frame; the blackboard is positioned on the support frame; the erasing component is connected with the blackboard in a sliding way; the erasing assembly comprises a driving assembly and a reciprocating assembly and is used for driving the erasing assembly to slide back and forth to erase chalk characters on the partial area of the blackboard; the teaching tool is novel in structure, high in automation degree, good in effect of erasing the chalk characters on the blackboard, convenient for subsequent use of related personnel, beneficial to operation and control of workers and capable of improving teaching efficiency.

Description

Teaching tool

Technical Field

The invention relates to the technical field of teaching tools, in particular to a teaching tool.

Background

The teaching tool is a general name of various appliances used by students for visually and vividly understanding teaching contents and appliances used by teachers during teaching, generally comprises a real object, a chart, modern equipment and conventional teaching aids, the conventional teaching aids are commonly used during teaching, such as a blackboard, a blackboard eraser, a white board, chalk and the like, are frequently contacted with a human body, and have a large influence on related personnel, so that the teaching tool is often used as a research point.

The existing teaching tool, especially when the application blackboard is taught, often need the manpower to clean the chalk word on the blackboard, the structure is too traditional, degree of automation is lower, even also have the automatic blackboard of cleaning of mode that adopts electric drive, but can not clean the in-process reciprocating motion of whole blackboard simultaneously, thereby it is not good to lead to the effect of cleaning, still remain the chalk writing on the blackboard after cleaning the end, be unfavorable for subsequent use, simultaneously, because the blackboard is longer, then lead to the stroke of cleaning also longer, thereby the efficiency of teaching has been reduced, especially to only erasing the chalk word at certain position on the blackboard, it is not easy to control, bring inconvenience for teaching work, therefore, to above current situation, need develop a teaching tool urgently, in order to overcome not enough in the current practical application.

Disclosure of Invention

The present invention is directed to a teaching tool to solve the above problems.

In order to achieve the purpose, the invention provides the following technical scheme:

an educational tool, comprising:

a support frame;

the blackboard is positioned on the support frame;

the erasing component is connected with the blackboard in a sliding way; the erasing assembly comprises a driving assembly and a reciprocating assembly and is used for driving the erasing assembly to slide back and forth to erase chalk characters on the partial area of the blackboard; and

and the translation assembly is positioned on the support frame, is rotatably connected with the erasing assembly and is used for moving the erasing assembly to clean all areas of chalk characters on the blackboard.

Compared with the prior art, the invention has the beneficial effects that:

when a teacher needs to use the blackboard to carry out interactive teaching with students, the support frame can be of an inverted U-shaped steel frame structure through the arranged support frame, the blackboard can be fixed on the inner side wall of the support frame and can be placed in an area which is convenient for the teacher to teach in a classroom as required, and in the teaching process, when the available space of the blackboard is used and the chalk characters on the blackboard need to be erased, the reciprocating assembly can be driven to work through the driving assembly arranged on the support frame and can be driven to work, so that the blackboard brush can be driven to slide on the surface of the blackboard in a reciprocating manner, two ends of the blackboard brush are closely attached to and slide on the surface of the blackboard through the chutes arranged on the upper side and the lower side of the blackboard to erase the chalk characters on the blackboard, the effect of erasing the chalk characters can be improved through the arranged reciprocating assembly, and no chalk characters remain on the blackboard, be favorable to subsequent use of relevant personnel, and whole journey all has the automatic completion of mechanical operation, can use manpower sparingly, and simultaneously, because of the blackboard brush reciprocating sliding's region is limited, be not enough to clean work to whole blackboard, consequently, through the translation subassembly work that sets up, can be in blackboard brush reciprocating sliding's while, make the blackboard brush translation on the blackboard, be favorable to removing the chalk writing at each position on the blackboard, carry out the clearance at all-round no dead angle, thereby the flexibility of equipment use and the efficiency of teaching have been improved, and be favorable to the staff to control, for relevant staff provides convenience, be worth promoting.

Drawings

Fig. 1 is a schematic sectional structure of the whole of the present invention.

Fig. 2 is an enlarged schematic view of part a of the present invention.

Fig. 3 is an enlarged schematic view of part B of the present invention.

Fig. 4 is a partially enlarged side view of the cam according to the present invention.

FIG. 5 is an enlarged cross-sectional view of a part of a blackboard brush according to the present invention.

Fig. 6 is a schematic perspective view of the transmission notch part of the present invention with enlarged size.

In the figure: 1-a lifting support plate, 2-a lifting rod, 3-a sliding sleeve, 4-a first spring, 5-a battery pack, 6-a support bottom plate, 7-a universal wheel, 8-an L-shaped support seat, 9-a first conical tooth, 10-a transmission shaft, 11-a first driven gear, 12-a first motor, 13-a first transmission support rod, 14-a first electromagnet, 15-a limiting magnet, 16-a driving gear, 17-a second driven gear, 18-a limiting chute, 19-a second electromagnet, 20-a rotating shaft, 21-a lifting base, 22-a connecting rod, 23-a crankshaft, 24-a second transmission support rod, 25-a dust collecting groove, 26-a placing groove, 27-a micro vibrator, 28-a second conical tooth, 29-a first screw rod, 30-thread bush, 31-slide block, 32-first through hole, 33-dust collection box, 34-first filter screen, 35-rubber plug, 36-blackboard, 37-first guide chute, 38-support frame, 39-blackboard brush, 40-air suction hole, 41-first transmission notch, 42-transmission chute, 43-buffer cushion block, 44-second spring, 45-first connecting rod, 46-hand wheel, 47-driving pulley, 48-rotating shaft, 49-transmission belt, 50-driven pulley, 51-second screw, 52-screw rod sliding sleeve, 53-base plate, 54-second motor, 55-cam, 56-ejector rod, 57-transmission slide plate, 58-triangular groove, 59-third spring, 60-baffle, 61-a sliding connecting rod, 62-a second guide sliding groove, 63-a second connecting rod, 64-a second transmission notch, 65-a guide sliding rail, 66-a dust exhaust port, 67-a second filter screen, 68-a negative pressure cavity, 69-a second through hole and 70-a sponge cushion.

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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Specific implementations of the present invention are described in detail below with reference to specific embodiments.

Referring to fig. 1, an instructional tool provided in an embodiment of the present invention includes:

a support frame 38;

the blackboard 36 is positioned on the supporting frame 38;

an erasing component which is connected with the blackboard 36 in a sliding way; the erasing component comprises a driving component and a reciprocating component and is used for driving the erasing component to slide back and forth to erase chalk characters on the partial area of the blackboard 36; and

and the translation assembly is positioned on the supporting frame 38, is rotatably connected with the erasing assembly, and is used for moving the erasing assembly to clean all chalk characters on the blackboard 36.

When a teacher needs to use the blackboard 36 to perform interactive teaching with students, the supporting frame 38 can be an inverted U-shaped steel frame structure through the supporting frame 38, the blackboard 36 can be fixed on the inner side wall of the supporting frame 38 and can be placed in an area convenient for the teacher to teach in a classroom as required, and in the teaching process, when the available space of the blackboard 36 is used and chalk characters on the blackboard 36 need to be erased, the driving assembly arranged on the supporting frame 38 works to drive the reciprocating assembly to work and drive the erasing assembly to work, so that the blackboard brush 39 can be driven to slide on the surface of the blackboard 36 in a reciprocating manner, two ends of the blackboard brush 39 are attached to and slide on the surface of the blackboard 36 through the sliding grooves arranged on the upper side and the lower side of the blackboard 36 to erase chalk characters on the blackboard 36, and the effect of erasing the chalk characters can be improved through the reciprocating assembly, make can not remain chalk writing on the blackboard 36, be favorable to the subsequent use of relevant personnel, and whole journey all has mechanical operation automatic completion, can use manpower sparingly, and simultaneously, because of the blackboard brush reciprocating sliding's region is limited, be not enough to clean work to whole blackboard 36, therefore, translation subassembly work through setting up, can be in blackboard brush 39 reciprocating sliding's while, make blackboard brush 39 translate on blackboard 36, be favorable to the chalk writing to removing each position on blackboard 36, carry out the clearance at all-round no dead angle, thereby the efficiency of the flexibility and the teaching of equipment use has been improved, and be favorable to the staff to control, for relevant staff provides convenience, be worth promoting.

In one embodiment of the present invention, referring to fig. 1, the translation assembly includes:

the rotating shaft 48 is rotatably connected with the supporting frame 38;

a rotating member and a transmission member, both connected to the rotating shaft 48;

the second screw rod 51 is connected with the transmission piece, and the second screw rod 51 is rotatably connected with the supporting frame 38; and

the second screw 51 is rotatably mounted in the screw sliding sleeve 52, and the screw sliding sleeve 52 is slidably connected with the support frame 38.

The rotating part can be driven by manpower or machinery, preferably by manpower, which is beneficial to saving resources and improving the control flexibility of the erasing work of the working personnel, wherein the rotating part can be in the form of a hand wheel 46, the hand wheel 46 can be manually rotated to drive the rotating shaft 48 to rotate and enable the transmission part to work, the transmission part comprises a driving belt wheel 47, a transmission belt 49 and a driven belt wheel 50, when the driving belt wheel 47 rotates, the driving belt 49 and the driven belt wheel 50 can drive the second screw rod 51 to rotate, so that the screw rod sliding sleeve 52 can horizontally move on the second screw rod 51, which is beneficial to driving the erasing component to clear chalk marks on each part of the blackboard 36, wherein, the transmission belt 49 can also be replaced by a gear or chain transmission mode, the selection is carried out according to the convenience degree of actual installation and the height of the blackboard 36, and the guide sliding rail 65 is arranged on the supporting frame 38, when the screw rod sliding sleeve 52 moves horizontally on the second screw rod 51, the bottom of the screw rod sliding sleeve 52 slides on the guide sliding rail 65 at the same time, so that the stability of the screw rod sliding sleeve 52 in directional movement can be improved.

In one embodiment of the present invention, referring to fig. 1 and 6, the driving assembly includes:

a first transmission notch 41 connected with the blackboard brush 39;

a limiting member located on the first transmission notch 41;

one end of the first link 45 is rotatably and slidably connected with the limiting member, and the other end of the first link 45 is rotatably connected with the screw rod sliding sleeve 52;

a second link 63, one end of the second link 63 is rotatably connected with the first link 45;

a second transmission notch 64 rotatably and slidably connected to the other end of the second connecting rod 63, and the second transmission notch 64 is connected to the supporting frame 38; and

and the push-pull assembly is rotatably connected with one end of the second connecting rod 63 and is used for driving the second connecting rod 63 and the first connecting rod 45 to rotate on the screw rod sliding sleeve 52.

When the blackboard 36 needs to be cleaned, the first connecting rod 45 and the second connecting rod 63 can be driven to rotate on the screw rod sliding sleeve 52 by starting the push-pull assembly to work, and the rotating motion of the first connecting rod 45 and the second connecting rod 63 can be changed into the linear reciprocating motion by the guiding action of the first transmission notch 41 and the second transmission notch 64, so that the blackboard eraser 39 can horizontally slide in the first guide sliding groove 37, wherein the driving mode of a crankshaft connecting rod or the driving mode of a cam can be adopted to replace the driving mode of the matching of the first connecting rod 45 and the second connecting rod 63, as long as the function of driving the blackboard eraser 39 to reciprocate can be realized, and the limit part is arranged in the first transmission notch 41 and the second transmission notch 64 and comprises the transmission sliding groove 42, the cushion block 43 and the second spring 44, so that the phenomenon that the first connecting rod 45 and the second connecting rod 63 violently impact with equipment when sliding to the limit position due to equipment faults and other factors can be avoided, thereby causing damage to the device and facilitating improved safety during use of the device, and if it is desired to improve the sensitivity of the limiting member, the limiting member may also take the form of a sensor instead of the spring 44, and when moving to the limit position and contacting the sensor, a braking action may be generated by the control signal.

In an embodiment of the present invention, referring to fig. 1, the push-pull assembly includes:

one end of the sliding connecting rod 61 is rotatably connected with the second connecting rod 63, and the sliding connecting rod 61 is slidably connected with the screw rod sliding sleeve 52; and

and the transmission sliding plate 57 is in sliding connection with the other end of the sliding connecting rod 61 through a triangular groove 58, and the transmission sliding plate 57 is installed on the screw rod sliding sleeve 52 in a sliding manner.

When the blackboard 36 needs to be cleaned, the reciprocating assembly can be started to work, so that the transmission sliding plate 57 can be driven to slide on the screw rod sliding sleeve 52, the sliding connecting rod 61 can be driven to slide in the triangular groove 58, the sliding connecting rod 61 can be made to move up and down in the second guide sliding groove 62, the triangular groove 58 can be replaced by an arc-shaped groove or other formed transmission modes, only the lifting function can be realized, when the sliding connecting rod 61 moves up and down, the second connecting rod 63 and the first connecting rod 45 can be driven to rotate on the screw rod sliding sleeve 52, and the blackboard brush 39 can horizontally slide in the first guide sliding groove 37 in a reciprocating mode to clean chalk marks on the blackboard 36.

In one embodiment of the present invention, referring to fig. 1 and 4, the reciprocating assembly includes:

a push rod 56 connected to one side of the transmission slide plate 57;

the cam 55 is connected with the ejector rod 56 in a rolling way;

the output shaft of the second motor 54 is connected with the cam 55, and the second motor 54 is positioned on the screw rod sliding sleeve 52; and

and the baffle 60 is connected with the other side of the transmission sliding plate 57 through a third spring 59, and the baffle 60 is positioned on the screw rod sliding sleeve 52.

The second motor 54 can be placed on the screw rod sliding bush 52 by the base plate 53, and the transmission mode of the second motor 54 through the cam 55 can be adjusted by changing the structure and the height of the base plate 53, when the amplitude of the swinging of the blackboard eraser 39 is required to be smaller, it is required to make the stroke of the movement of the transmission slide plate 57 shorter and to save the space occupied for installation, and on the contrary, when the length of the blackboard 36 is longer, it is required to improve the wiping efficiency, it is necessary to increase the stroke of the transmission slide plate 57, and thus to increase the roller center radius of the cam, so that the second motor 54 can be started to work as required, the cam 55 can be driven to rotate, the mandril 56 and the transmission sliding plate 57 can be driven to slide on the screw rod sliding sleeve 52, and the elastic force of the arranged third spring 59 is matched with the cam 55 to work, the transmission slide plate 57 can slide on the screw rod slide sleeve 52 in a reciprocating manner, so that the sliding connecting rod 61 can be driven to slide in the triangular groove 58.

In an embodiment of the present invention, please refer to fig. 1 and fig. 5, which further includes: the negative pressure cavity 68 is arranged in the blackboard brush 39, and is communicated with the outside through the dust exhaust port 66; and

the suction hole 40 and the second through hole 69, one end of the suction hole 40 and one end of the second through hole 69 are respectively connected with two sides of the negative pressure cavity 68, and the other ends of the suction hole 40 and the second through hole 69 are communicated with the outside.

When the screw rod sliding sleeve 52 moves horizontally on the second screw rod 51, the blackboard brush 39 can be driven to slide horizontally in the first guide sliding groove 37 on the blackboard 36, and the sponge pad 70 arranged at the bottom of the blackboard brush 39 can be contacted with the surface of the blackboard 36, so that chalk characters on the blackboard 36 can be erased through the sponge pad 70, the blackboard brush 39 can be connected with an external air source through the arranged suction hole 40 while moving, negative pressure can be kept in the negative pressure cavity 68, when the blackboard brush 39 is used for erasing work, redundant chalk scraps can be absorbed in the negative pressure cavity 68 through the sponge pad 70 and the second through hole 69 while the sponge pad 70 erases chalk characters, one end of the second through hole 69 is in through connection with the sponge pad 70, and a second filter screen 67 is arranged at one end of the suction hole 40, so that the chalk scraps can be concentrated in the negative pressure cavity 68 and can be periodically cleaned through the dust exhaust port 66 by workers, so as to absorb and collect the redundant chalk dust in the wiping process, thereby avoiding the flying of the chalk dust, and leading the relevant working personnel and students to be far away from the blackboard 36 when wiping the chalk characters, thereby reducing the harm to the body of the user.

In an embodiment of the present invention, please refer to fig. 1 and fig. 3, which further includes: the lifting support plate 1 is positioned on the support frame 38;

the dust collection groove 25 is connected with the lifting support plate 1 in a rotating mode;

a dust collecting box 33 positioned on the lifting support plate 1;

a rubber plug 35, wherein the rubber plug 35 is detachably arranged on the bottom of the dust collection box 33; and

the inclined assembly penetrates through the lifting support plate 1 and is slidably mounted on the lifting support plate, and the inclined assembly is rotatably connected with the bottom of the dust collection groove 25 and used for driving one end of the dust collection groove 25 to rotate around the other end.

Through the work of the arranged inclined component, one end of the dust collection groove 25 can be driven to rotate around the other end in the placing groove 26 on the lifting support plate 1, so that the chalk dust falling from the blackboard 36 into the dust collection groove 25 can enter the dust collection box 33 under the action of gravity and can be regularly discharged and cleaned through the rubber plug 35 by workers, thereby being beneficial to avoiding the chalk dust from scattering around, ensuring the cleanness and sanitation of the working environment, reducing the harm to the body of a user and providing convenience for the workers, wherein the dust collection box 33 can adopt a trapezoidal structure with a large upper section and a small lower section and can also adopt a structure with a semicircular section, so that the chalk dust is concentrated at the bottom of the dust collection box and is convenient for subsequent cleaning, and the cleaning effect of the chalk dust collection groove 25 can be further improved through the micro vibrator 27 arranged at the bottom of the dust collection box 33, avoid collecting the condition that the inner wall of dirt groove 25 appears bonding chalk bits to influence subsequent use, and be equipped with the first filter screen 34 of slope installation in the dust collection box 33, be favorable to avoiding other debris to fall into the bottom of dust collection box 33, thereby cause the condition such as jam.

In one embodiment of the present invention, referring to fig. 1 and 2, the tilting assembly includes:

one end of the threaded sleeve 30 is rotatably connected with the bottom of the dust collection groove 25, and the threaded sleeve 30 is installed on the lifting support plate 1 in a penetrating and sliding manner;

the first screw 29 is rotationally connected with the threaded sleeve 30 and rotationally connected with the lifting support plate 1;

a connector connected to one end of the first screw 29;

one end of the transmission shaft 10 is connected with the connecting piece, and the transmission shaft 10 is rotatably connected with the lifting support plate 1;

a first driven gear 11 located on the other end of the transmission shaft 10; and

and the control component is connected with the lifting support plate 1 and is used for controlling the first driven gear 11 to drive the dust collection groove 25 to rotate.

When chalk dust in the dust collection groove 25 needs to be cleaned, the control assembly can be started to work, so that the transmission shaft 10 can be driven to rotate, and the transmission function of the connecting piece is achieved, the connecting piece comprises a first conical tooth 9 and a second conical tooth 28, the first screw 29 can be driven to rotate in the threaded sleeve 30, so that the threaded sleeve 30 can be driven to slide upwards in a first through hole 32 through the sliding block 31, the first through hole 32 is formed in the lifting support plate 1, and one end of the dust collection groove 25 can be driven to rotate around the other end in the placing groove 26 through the upward movement of the threaded sleeve 30, wherein the mode that the threaded sleeve 30 drives the sliding block 31 to slide upwards can also be achieved through a simple cam mechanism, of course, the lifting function can also be achieved in a hydraulic cylinder mode, preferably, the sliding mode of the sliding block 31 is here, the cam mechanism occupies a large space, the rotating piece is easy to damage, and the service life of, meanwhile, a driving mechanism is required to be additionally added in the mode of adopting the hydraulic cylinder, so that the linkage of the whole equipment is not convenient to realize, the cost is increased, and the resources are wasted.

In one embodiment of the present invention, referring to fig. 1, the control assembly includes:

the first motor 12 is positioned on the lifting support plate 1;

a rotating shaft 20 connected to an output end of the first motor 12, wherein the rotating shaft 20 is rotatably connected to the lifting support plate 1;

the limiting sliding groove 18 is formed in the rotating shaft 20;

the driving gear 16 is connected with the limit sliding groove 18 in a sliding mode; and

and the control unit is respectively positioned on the driving gear 16 and the rotating shaft 20 and is used for controlling the sliding direction and the sliding position of the driving gear 16 on the limiting sliding groove 18.

When dust removal is needed, the control unit can be manually operated, the control unit comprises a first electromagnet 14, a limiting magnet 15 and a second electromagnet 19, the second electromagnet 19 can be electrified and generates magnetic attraction with the limiting magnet 15, so that the driving gear 16 is driven to horizontally slide to a limited position on the limiting sliding groove 18, and the driving gear 16 and the first driven gear 11 are in a meshed state, wherein the control unit can also be realized in a signal control mode or a PLC program control mode and the like, but the electronic products have higher cost and are difficult to maintain after being damaged, the inconvenience is brought to workers, the maintenance cost is improved, the electromagnet mode is adopted, the operation is simple, the cost is low, when dust removal is carried out, the first motor 12 is started to work, and the first motor 12 is connected with the lifting support plate 1 through the L-shaped support seat 8, thereby, the rotating shaft 20 can be driven to rotate on the lifting support plate 1 through the first transmission support rod 13 and the second transmission support rod 24, and the transmission shaft 10 can be driven to rotate, which is beneficial to the rapid dust removal work.

In an embodiment of the present invention, please refer to fig. 1, which further includes: the supporting bottom plate 6 is connected with the lifting supporting plate through at least one group of lifting pieces; and

and the driving piece is respectively connected with the lifting support plate and the support bottom plate and is used for driving the lifting piece to drive the lifting support plate to move up and down on the support bottom plate.

In the using process of the blackboard 36, especially when carrying out interactive teaching with students, the situation that the blackboard is too high or too low may exist, which is not beneficial for students and teachers with different heights to write on the blackboard 36, therefore, when the height of the blackboard 36 needs to be adjusted, a control component can be operated by a worker, the driving component can be driven to work, wherein, the driving component comprises a second driven gear 17, a connecting rod 22 and a crankshaft 23, the second driven gear 17 is meshed with a driving wheel 16, so as to drive the crankshaft 23 to rotate, and drive the connecting rod 22 to rotate on a supporting base plate 6 through a lifting base 21, as the crankshaft 23 continuously rotates, the distance between the lifting supporting plate 1 and the supporting base plate 6 can be increased through the supporting action of the connecting rod 22, thereby achieving the purpose of adjusting the height of the blackboard 36, and in the process of lifting or descending of the lifting supporting plate 1, the lifting component can be driven to synchronously move, the lifter is including lifter 2, sliding sleeve 3 and first spring 4, lifter 2 through setting up slides in sliding sleeve 3, and according to first spring 4's elastic action, can improve the stationarity that lift backup pad 1 rises and descends the in-process, work through control assembly, can realize gathering dust and raising and lowering functions's linkage, moreover, the steam generator is simple in operation, resources are saved, for the staff facilitates, and simultaneously, bottom sprag plate 6 still is equipped with four sets of universal wheels 7 that have arresting gear, can be convenient remove and brake whole equipment, so that relevant staff's use, still be equipped with group battery 5 on sprag plate 6, be used for providing the electric energy to consumer such as first motor 12 and second motor 54.

It should be noted that, in the present invention, unless otherwise specifically stated or limited, the terms "sliding", "rotating", "fixing", "providing", and the like are to be understood in a broad sense, and may be, for example, a welded connection, a bolted connection, or an integral body; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (10)

1. An educational tool, wherein the educational tool comprises:

a support frame;

the blackboard is positioned on the support frame;

the erasing component is connected with the blackboard in a sliding way; the erasing assembly comprises a driving assembly and a reciprocating assembly and is used for driving the erasing assembly to slide back and forth to erase chalk characters on the partial area of the blackboard; and

and the translation assembly is positioned on the support frame, is rotatably connected with the erasing assembly and is used for moving the erasing assembly to clean all areas of chalk characters on the blackboard.

2. The educational tool of claim 1, wherein the translation assembly comprises:

the rotating shaft is rotatably connected with the supporting frame;

the rotating part and the transmission part are connected with the rotating shaft;

the second screw rod is connected with the transmission piece and is rotationally connected with the supporting frame; and

the second screw rod is installed in the screw rod sliding sleeve in a rotating mode, and the screw rod sliding sleeve is connected with the supporting frame in a sliding mode.

3. The educational tool of claim 2, wherein the drive assembly comprises:

the first transmission notch is connected with the blackboard brush;

the limiting piece is positioned on the first transmission notch;

one end of the first connecting rod is rotatably and slidably connected with the limiting piece, and the other end of the first connecting rod is rotatably connected with the screw rod sliding sleeve;

one end of the second connecting rod is rotatably connected with the first connecting rod;

the second transmission notch is connected with the other end of the second connecting rod in a rotating and sliding manner and is connected with the supporting frame; and

and the push-pull assembly is rotatably connected with one end of the second connecting rod and is used for driving the second connecting rod and the first connecting rod to rotate on the screw rod sliding sleeve.

4. An educational tool as recited in claim 3, wherein the push-pull assembly comprises:

one end of the sliding connecting rod is rotatably connected with the second connecting rod, and the sliding connecting rod is slidably connected with the screw rod sliding sleeve; and

and the transmission sliding plate is connected with the other end of the sliding connecting rod in a sliding manner through a triangular groove, and the transmission sliding plate is slidably arranged on the screw rod sliding sleeve.

5. An educational tool in accordance with claim 4, wherein the reciprocating assembly comprises:

the ejector rod is connected with one side of the transmission sliding plate;

the cam is in rolling connection with the ejector rod;

an output shaft of the second motor is connected with the cam, and the second motor is positioned on the screw rod sliding sleeve; and

the baffle is connected with the other side of the transmission sliding plate through a third spring and is positioned on the screw rod sliding sleeve.

6. The educational tool of claim 1, further comprising: the negative pressure cavity is arranged in the blackboard brush and communicated with the outside through a dust exhaust port; and

the negative pressure cavity is provided with an air exhaust hole and a second through hole, one ends of the air exhaust hole and the second through hole are respectively connected with two sides of the negative pressure cavity, and the other ends of the air exhaust hole and the second through hole are communicated with the outside.

7. The educational tool of claim 1, further comprising: the lifting support plate is positioned on the support frame;

the dust collection groove is rotatably connected with the lifting support plate;

the dust collecting box is positioned on the lifting support plate;

the rubber plug is detachably arranged at the bottom of the dust collecting box; and

the inclined assembly penetrates through the lifting support plate and is slidably mounted on the lifting support plate, and the inclined assembly is rotatably connected with the bottom of the dust collection groove and used for driving one end of the dust collection groove to rotate around the other end.

8. The educational tool of claim 7, wherein the tilt assembly comprises:

one end of the threaded sleeve is rotatably connected with the bottom of the dust collection groove, and the threaded sleeve is installed on the lifting support plate in a penetrating and sliding manner;

the first screw rod is rotationally connected with the threaded sleeve and is rotationally connected with the lifting support plate;

the connecting piece is connected with one end of the first screw rod;

one end of the transmission shaft is connected with the connecting piece, and the transmission shaft is rotatably connected with the lifting support plate;

a first driven gear located on the other end of the drive shaft; and

and the control component is connected with the lifting support plate and used for controlling the first driven gear to drive the dust collection groove to rotate.

9. The educational tool of claim 8, wherein the control assembly comprises:

the first motor is positioned on the lifting support plate;

the rotating shaft is connected with the output end of the first motor and is rotatably connected with the lifting support plate;

the limiting sliding groove is formed in the rotating shaft;

the driving gear is connected with the limiting sliding groove in a sliding mode; and

and the control unit is respectively positioned on the driving gear and the rotating shaft and used for controlling the sliding direction and position of the driving gear on the limiting sliding chute.

10. The educational tool of claim 9, further comprising: the supporting bottom plate is connected with the lifting supporting plate through at least one group of lifting components; and

and the driving piece is respectively connected with the lifting support plate and the support bottom plate and is used for driving the lifting piece to drive the lifting support plate to move up and down on the support bottom plate.

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