Dust-free blackboard

Abstract

The utility model relates to a dust-free blackboard which comprises a soft board assembly, a dust-free blackboard body and a dust-free blackboard body, the soft board assembly is arranged in a rotatable mode, and the surface of the soft board assembly is used for writing; the supporting mechanism is arranged in the soft board assembly, is parallel to the soft board assembly on the front side and is used for supporting the soft board assembly; the cleaning mechanism is arranged below the rear side of the soft board assembly, the distance between the cleaning mechanism and the soft board assembly is adjustable, and the cleaning mechanism is used for selectively cleaning the content on the surface of the soft board assembly. The dust-free blackboard has the advantages that according to the dust-free blackboard, a traditional blackboard face is replaced by the rotatable soft board face assembly, circulating writing can be achieved, the writing area of the blackboard is effectively increased, the problem that the utilization rate of writing at the high positions and dead corners of the blackboard is low is effectively solved, and meanwhile the supporting mechanism is arranged in the dust-free blackboard to provide supporting for the blackboard; and the cleaning mechanism can move, so that contents on the blackboard surface can be selectively kept and cannot be cleared away.

Description

Technical Field

[0001] The utility model relates to the technical field of teaching tools, in particular to a dust-free blackboard. Background Art

[0002] As we all know, traditional push-pull blackboards are very easy to generate dust, and impurities such as chalk heads are very likely to remain in the blackboard frame and are not easy to clean. The movable board is easily affected by the impurities in the blackboard frame. Using a blackboard eraser to wipe the blackboard manually is not only easy to generate dust, but also wastes time. In addition, the writing area of ​​the blackboard is limited. During the teaching process, the same content is often erased and written frequently and repeatedly, which greatly increases the workload of teachers and is very likely to waste class time. Therefore, it is very important to eliminate the shortcomings of traditional teaching aids at the same time. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a dust-free blackboard. Aiming at the shortcomings of the existing teaching blackboards, the push-pull structure of the traditional push-pull blackboard is used as a basis, the original structure is improved, and new components are added to solve the above-mentioned multiple problems at the same time, so that the blackboard can be automatically cleaned, and water is used to avoid dust generation. At the same time, the outer frame of the blackboard is improved so that the debris in the moving track of the moving board can be cleared. In addition, this design can effectively increase the blackboard writing area and has the function of retaining the blackboard writing content to a certain extent, reducing the workload of teachers and protecting the health of teachers and students.

[0004] The utility model solves the above technical problems with the following technical solutions: a dust-free blackboard, comprising:

[0005] A software panel component, the software panel component can be rotatably arranged, and the surface of the software panel component is used for writing;

[0006] A supporting mechanism, wherein the supporting structure is arranged inside the software panel assembly and parallel to the front side of the software panel assembly, and is used to support the software panel assembly;

[0007] A cleaning mechanism is disposed below the rear side of the software panel assembly, and the distance of the cleaning mechanism relative to the software panel assembly is adjustable, so as to selectively clean the contents on the surface of the software panel assembly.

[0008] The beneficial effects of the utility model are as follows: the dust-free blackboard replaces the traditional blackboard surface with a rotatable soft board surface assembly, which can realize circular writing, effectively increase the blackboard writing area, and effectively solve the problem of low utilization rate of writing at high places and dead corners of the blackboard. At the same time, the internal supporting mechanism provides support for it to ensure the stability of writing; a cleaning mechanism is added, and the cleaning mechanism is installed at the lower rear side of the soft board surface assembly, and cooperates with the rotatable soft board surface assembly to realize self-cleaning, reducing the generation of chalk dust; at the same time, the cleaning mechanism can move toward or away from the rear side of the soft board surface assembly, so that the content on the blackboard can be selectively retained at any time without being cleared, reducing the workload of teachers and protecting the health of teachers and students.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Further, it also includes: a blackboard outer frame, the blackboard outer frame is a frame structure surrounded by a top plate, a bottom plate and two side plates, and the bottom plate is provided with a transverse groove, which extends downwardly from both sides of the bottom plate of the blackboard outer frame to form a V-shaped groove;

[0011] The soft board surface assembly and the cleaning mechanism are both arranged in the outer frame of the blackboard, and at least one set of the soft board surface assembly and the cleaning mechanism is arranged in the outer frame of the blackboard.

[0012] The beneficial effect of adopting the above further scheme is that the design of the V-shaped groove allows the dirt and excess water generated when cleaning the blackboard to be effectively collected, and by arranging the transverse groove on the bottom plate, the dirt and excess water generated by the cleaning mechanism when erasing the content on the blackboard surface can directly drip into the V-shaped groove, thereby improving the cleaning efficiency. The frame structure formed by the top plate, the bottom plate and the two side plates of the blackboard outer frame not only provides support and protection for the soft board assembly and the cleaning mechanism, but also enhances the structural stability and durability of the entire blackboard system.

[0013] Furthermore, the soft board assembly comprises: a soft board and a transmission belt, the soft board is arranged in a vertical direction, the soft board is attached to the surface of a pair of transmission belts arranged at intervals, and the transmission belt drives the soft board to rotate cyclically;

[0014] A pair of pulleys is disposed on each side of the transmission belt, and each pair of pulleys is coaxially disposed on a pulley shaft, and the power device drives the pulley shaft located on either side of the transmission belt to rotate to drive the transmission belt to rotate;

[0015] A connecting frame is respectively arranged on both sides of the pulley shaft, and the pulley shaft is connected to the inner side wall of the outer frame of the blackboard through the connecting frame.

[0016] The beneficial effects of adopting the above-mentioned further scheme are: improving the traditional blackboard, replacing the traditional blackboard surface with a composite structure composed of a transmission belt and a soft board surface, and driving the soft board surface to rotate in a circular motion through the transmission belt. The used area on the blackboard surface can be automatically adjusted to the rear, so that writing can continue without erasing the written content, thereby greatly increasing the blackboard writing area, and important content can be retained to avoid repeated writing, which not only improves writing efficiency but also saves time in wiping the blackboard; the motor drives the pulley shaft to rotate, thereby driving the transmission belt and the soft board surface to rotate, and the entire operation process has a high degree of automation and is easy to use.

[0017] Furthermore, rails are provided on the top plate and the bottom plate;

[0018] Two groups of the software panel components are arranged in the outer frame of the blackboard, and the two groups of the software panel components are arranged in a colinear manner or in parallel with each other;

[0019] At least one group of the software board components is connected to the blackboard outer frame. The connecting frame connected to the blackboard outer frame is provided with a roller on one side thereof, and the roller moves along the track;

[0020] A projection screen is arranged on the rear side of the soft board component which is rollingly connected to the outer frame of the blackboard.

[0021] The beneficial effects of adopting the above-mentioned further scheme are: by providing tracks on the top plate and the bottom plate, rollers are installed on the connecting frame of the soft board assembly, so that the soft board assembly can move along the track; a projection screen is provided on the rear side of the soft board assembly that is rollingly connected to the outer frame of the blackboard, so that the projection screen can be used by pushing the front soft board assembly when needed; by integrating the projection screen, the function of the blackboard is greatly expanded, and teachers or speakers can display PPT, videos or other multimedia content while writing, thereby improving teaching effectiveness and meeting efficiency.

[0022] Further, the support mechanism comprises: a soft board main frame, a support plate, an upper spring and a lower spring, the support plate is arranged parallel to the front side of the soft board surface, and the side of the support plate away from the soft board surface is connected to the soft board main frame through a plurality of vertically spaced support plate connecting rods;

[0023] One end of the upper spring is connected to the side of the support plate away from the soft board surface or above the uppermost support plate connecting rod, and the other end of the upper spring is connected to the soft board main frame above the connection between the support plate connecting rod and the soft board main frame;

[0024] One end of the lower spring is connected to the side of the support plate away from the soft board surface or below the support plate connecting rod at the bottom, the other end of the lower spring is provided with an electromagnetic pull rod, and an electromagnet is also provided on the soft board main frame below the connection between the support plate connecting rod and the soft board main frame, the electromagnet is spaced apart from the end of the electromagnetic pull rod away from the lower spring, and the electromagnet is used to energize and adsorb the electromagnetic pull rod;

[0025] The support plate, a pair of support plate connecting rods and the soft board main frame are connected to form a four-bar mechanism, which is used to provide support for the soft board surface when writing on the blackboard; when the electromagnet is energized, the lower spring drives the support plate to move away from the soft board surface under the action of magnetic force; when the electromagnet is de-energized, the upper spring drives the support plate to move closer to the soft board surface.

[0026] The beneficial effect of adopting the above further scheme is: when writing, the support plate fits the inner side of the soft board surface. When the soft board surface needs to be rotated, the electromagnet is energized. When energized, the electromagnet attracts the electromagnetic pull rod, so that the lower spring exerts a force greater than the upper spring under the action of magnetic force, so that the four-bar mechanism operates, and the support plate moves backward relative to the soft board surface, so that the support plate is retracted, realizing the recovery movement of the four-bar mechanism, thereby freely controlling the operation of the support mechanism; when the electromagnet is not energized, the lower spring no longer works and does not exert any force. The four-bar mechanism is only affected by the pulling force of the upper spring. The upper spring drives the support plate to move closer to the soft board surface and return to the supporting position.

[0027] Furthermore, the soft board main frame is provided with a plurality of soft board main frames parallel to the support plate, each of the soft board main frames is connected to the support plate through a pair of support plate connecting rods, and the two ends of the support plate connecting rods are respectively rotatably connected to the support plate and the soft board main frame;

[0028] Both sides of the soft board main frame in the length direction are respectively connected to the pulley shaft located above and the second sleeve outside the pulley shaft located below;

[0029] A crossbeam is also provided parallel to the second sleeve and passes through the plurality of soft board main frames, and vertical beams are respectively extended downward from both ends of the crossbeam, and the ends of the vertical beams away from the crossbeams are connected to the pulley shaft located below.

[0030] The beneficial effect of adopting the above-mentioned further scheme is: by providing a second sleeve on the outer sleeve of the pulley shaft below, the soft board main frame is prevented from affecting the rotation of the pulley shaft, thereby ensuring the normal operation of the pulley shaft; the setting of the horizontal beam and the vertical beam improves the stability of the structure, and the horizontal beam that runs through the soft board main frame is used to prevent the soft board main frame from rotating, thereby keeping the soft board main frame in a stable state to ensure the normal operation of the four-bar mechanism.

[0031] Furthermore, the cleaning mechanism is provided at the lower rear side of the soft board assembly that is rollingly connected to the blackboard outer frame, and the cleaning mechanism is provided parallel to the width direction of the soft board;

[0032] The two ends of the cleaning mechanism are respectively provided with a side bracket; the two ends of the pulley shaft below are also vertically provided with a connecting rod, and the end of the connecting rod away from the pulley shaft is provided with a groove;

[0033] One end of the side bracket is arranged in the groove and moves along the groove to approach and away from the soft board surface, and the cleaning mechanism is installed at the lower rear side of the soft board surface through the side bracket and the connecting rod;

[0034] A side wall is extended from the side of the side bracket close to the soft board surface in a direction parallel to the connecting rod, and a sawtooth is provided on the upper end surface of the side wall. The sawtooth is meshed with a rotating knob, and the distance of the side bracket relative to the soft board surface is controlled by the rotating knob.

[0035] The beneficial effects of adopting the above-mentioned further scheme are as follows: the cleaning mechanism is installed on the outer side of the rear of the movable plate, and the cleaning mechanism is arranged parallel to the width direction of the soft board surface. The soft board surface is driven to move by controlling the transmission belt, and sliding friction occurs with the cleaning mechanism to achieve the function of automatically cleaning the blackboard, which greatly improves the cleaning efficiency; through the cooperation of the connecting rod and the side bracket, the side bracket can move forward and backward through the groove, so that the cleaning mechanism can move closer to and away from the soft board surface under the drive of the side bracket, and the distance of the side bracket relative to the soft board surface is controlled by turning the knob, so that the distance between the cleaning mechanism and the soft board surface is adjustable, thereby controlling whether the cleaning mechanism is in contact with the blackboard, so that the content on the blackboard surface can be selectively retained at any time without being cleared; the connection structure is simple, which improves the flexibility and adaptability of the cleaning mechanism.

[0036] Further, the cleaning mechanism comprises: a wiper, a wiper mounting frame, a blackboard eraser, a blackboard eraser mounting frame and a water pump, wherein the wiper mounting frame and the blackboard eraser mounting frame are both arranged along the width direction of the soft board surface, and both sides of the wiper mounting frame and the blackboard eraser mounting frame are respectively connected to one of the side brackets, and the wiper mounting frame is arranged above the blackboard eraser mounting frame;

[0037] The wiper mounting frame is vertically provided with a wiper on both sides close to or away from the soft board surface;

[0038] The blackboard eraser mounting frame is provided with a blackboard eraser at two ends close to or away from the soft board surface respectively;

[0039] The blackboard eraser mounting frame is an internal hollow structure, the water pump passes water into the interior of the blackboard eraser mounting frame through a plurality of hoses, and the blackboard eraser mounting frame is provided with small holes on both sides of the blackboard eraser that are connected to the internal hollow structure for soaking the blackboard eraser;

[0040] Or, the cleaning mechanism includes: a wiper, a wiper mounting frame, a blackboard eraser, a blackboard eraser mounting frame, a dry blackboard eraser, a dry blackboard eraser mounting frame, a dry blackboard eraser side bracket and a water pump, the wiper mounting frame and the blackboard eraser mounting frame are both arranged along the width direction of the soft board surface, the two sides of the wiper mounting frame and the blackboard eraser mounting frame are respectively connected to one of the side brackets, and the wiper mounting frame is arranged above the blackboard eraser mounting frame;

[0041] The wiper mounting frame is vertically provided with a wiper on both sides close to or away from the soft board surface;

[0042] The blackboard eraser mounting frame is provided with a blackboard eraser at two ends close to or away from the soft board surface respectively;

[0043] The blackboard eraser mounting frame is an internal hollow structure, the water pump passes water into the interior of the blackboard eraser mounting frame through a plurality of hoses, and the blackboard eraser mounting frame is provided with small holes on both sides of the blackboard eraser that are connected to the internal hollow structure for soaking the blackboard eraser;

[0044] A slot is provided on the upper end surface of each side bracket, and the dry blackboard eraser side bracket is inserted into the slot. The dry blackboard eraser mounting frame is provided between a pair of the dry blackboard eraser side brackets, and a dry blackboard eraser is provided at each end of the dry blackboard eraser mounting frame close to or away from the soft board surface.

[0045] The beneficial effects of adopting the above-mentioned further scheme are as follows: by providing grooves on both sides of the blackboard mounting frame and the wiper mounting frame, the cleaning tools can be installed on both sides, so that only the movable plate needs to be moved to align with the fixed plate to clean both blackboard surfaces at the same time; by freely controlling the side bracket to move back and forth along the groove by turning the knob, whether the blackboard eraser and the wiper are in contact with the blackboard is controlled, and sliding friction occurs with the blackboard eraser and wiper on the cleaning mechanism to achieve the function of automatically cleaning the blackboard; at the same time, the blackboard eraser is soaked in water, and the wet blackboard eraser is used to clean the blackboard, which can minimize the generation of dust.

[0046] Furthermore, a clean storage box is also provided at the bottom of the blackboard outer frame, and the clean storage box includes: a dirt storage box, a filter layer and a water tank, and the dirt storage box and the filter layer are both provided in the water tank;

[0047] The dirt collection box is arranged below the converging point of the V-shaped grooves, and the dirt collection box is covered with the filter layer, and the filter layer is used to filter and collect clean water back into the water tank;

[0048] The water tank is connected to the water pump through a hose.

[0049] The beneficial effects of adopting the above further scheme are: the excess water and dirt generated by the cleaning mechanism during the cleaning process are guided into the dirt collection box through the V-shaped groove, and then filtered through the filter layer. The filter layer is used to filter and collect clean water back into the water tank. The water pump then pumps out this part of water and supplies it to the cleaning mechanism for reuse, realizing the recycling of water resources and greatly reducing the water resource consumption in cleaning operations; at the same time, the chalk heads generated during the teaching process can also be directly placed in the horizontal groove opened on the bottom plate of the outer frame of the blackboard, and the chalk heads enter the dirt collection box along the V-shaped groove below the horizontal groove. The design of the cleaning storage box enables the dirt and excess water generated during the cleaning process to be automatically collected and processed, simplifying the cleaning process.

[0050] Furthermore, a pair of rollers located at the bottom is also provided with roller protection covers, which are arranged on the side of the rollers away from the soft board surface, and are used to push away debris on the movement path of the rollers;

[0051] A side wall notch is also provided below the two side panels of the blackboard outer frame, and a chalk head collection box is provided below the outer side of each side wall notch, and the chalk head collection box is used to store debris pushed over by the roller protective cover.

[0052] The beneficial effect of adopting the above-mentioned further scheme is: by installing a roller protection cover on the roller, the roller reciprocates on the track inside the outer frame of the blackboard, and the roller protection cover can push the debris on the roller movement path, and can push away the debris on the roller movement path, and block the debris outside the roller, to prevent the debris from getting stuck in the roller and affecting the movement of the moving plate; when the roller moves to the side wall of the outer frame, the gap in the side wall can allow the roller protection cover to pass completely, and the debris encountered on the roller movement path is cleared out, and then the roller protection cover pushes the chalk heads that fall on the movement track into the chalk head collection boxes on both sides, to avoid collisions between the blackboard structures and between the blackboard structures and the debris. The design here can effectively clean the chalk heads on the movement path of the moving plate and prevent the chalk heads from hindering its movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0054] Figure 2 for Figure 1 A cross-sectional view of

[0055] Figure 3 for Figure 1 Enlarged view of point B in the middle;

[0056] Figure 4 This is a structural schematic diagram of a support mechanism in an embodiment of the utility model;

[0057] Figure 5 for Figure 4 Enlarged view of point C in the middle;

[0058] Figure 6 A connection diagram of a soft board main frame in an embodiment of the utility model;

[0059] Figure 7 This is a schematic diagram of the structure of a cleaning mechanism in one embodiment of the utility model;

[0060] Figure 8 for Figure 7 A partial cross-sectional view of the cleaning mechanism without one side bracket;

[0061] Fig. 9 A schematic diagram of a three-dimensional structure of an embodiment of the present invention;

[0062] Fig.10 for Fig. 9 Enlarged view of point D in the middle.

[0063] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0064] 1. Soft board assembly; 2. Blackboard outer frame; 3. Cleaning mechanism; 4. Cleaning storage box; 5. Support mechanism; 101. Pulley; 102. Connecting frame; 103. Motor; 104. Pulley shaft; 105. First sleeve; 106. Second sleeve; 107. Crossbeam; 108. Vertical beam; 111. Soft board; 112. Transmission belt; 121. Support plate; 122. Support plate connecting rod; 123. Upper spring; 124. Lower spring; 125. Electromagnetic pull rod; 126. Electromagnet; 127. Soft board main frame; 201. V-shaped groove ; 202, side wall notch; 203, projection screen; 311, wiper; 312, wiper mounting bracket; 321, blackboard eraser mounting bracket; 322, blackboard eraser; 33, side bracket; 34, connecting rod; 35, hose hub; 36, turning knob; 37, dry blackboard eraser side bracket; 381, dry blackboard eraser; 382, ​​dry blackboard eraser mounting bracket; 401, dirt storage box; 402, filter layer; 403, water tank; 404, water pump; 405, drain hole; 501, roller; 502, roller protection cover; 503, chalk head collection box. DETAILED DESCRIPTION

[0065] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0066] like Figure 1-2 , Figure 9-10 As shown, the utility model provides a dust-free blackboard, which can realize cyclic writing and self-cleaning, and can retain the content of the blackboard to a certain extent. Specifically, it includes: a soft board component 1, a support mechanism 5, and a cleaning mechanism 3, wherein the soft board component 1 can be vertically rotated and can be written on the surface of the soft board component; because the soft board component 1 is not strong in supportability when writing, a support mechanism 5 is also arranged in the soft board component 1, and the support mechanism 5 is arranged close to and parallel to the front side soft board component 1, so that the soft board component 1 can be effectively supported when writing; a movable cleaning mechanism 3 is also arranged at the lower rear side of the soft board component 1, and the cleaning mechanism 3 can move in the direction of approaching or moving away from the soft board component 1, so that the content on the blackboard can be selectively retained at any time without being cleared. When the content on the soft board component 1 needs to be erased, the cleaning mechanism 3 moves to contact with the rear side of the soft board component 1, and cooperates with the soft board component 1 to make a rotating motion to realize the erasure of the content on the soft board component 1. In this embodiment, the side close to the dust-free blackboard used by the user is defined as the front side of the soft board assembly 1 .

[0067] This dust-free blackboard replaces the traditional blackboard surface with a rotatable soft board surface assembly 1, which can realize circular writing, effectively increase the blackboard writing area, and effectively solve the problem of low utilization rate of writing at high places and dead corners of the blackboard. At the same time, the internal supporting mechanism 5 provides support for it to ensure the stability of writing; a cleaning mechanism 3 is added, and the cleaning mechanism 3 is installed at the lower rear side of the soft board surface assembly 1, and cooperates with the rotatable soft board surface assembly 1 to realize self-cleaning and reduce the generation of chalk dust; at the same time, the cleaning mechanism 3 can move toward or away from the rear side of the soft board surface assembly 1, so that the content on the blackboard can be selectively retained at any time without being cleared, reducing the workload of teachers and protecting the health of teachers and students.

[0068] like Figure 1 , Fig. 9As shown, in the preferred embodiment, a blackboard outer frame 2 is also provided on the dust-free blackboard. Specifically, the blackboard outer frame 2 is a frame structure surrounded by a top plate, a bottom plate and two side plates. The two sides of the bottom plate of the blackboard outer frame 2 extend downwardly to form a V-shaped groove 201, where the dirt and excess water generated by cleaning the blackboard are collected. At the same time, in order to collect the dirt and excess water generated when the cleaning mechanism 3 erases the contents on the blackboard surface, a transverse groove is provided on the bottom plate, that is, an opening connected to the V-shaped groove 201 is provided on the bottom plate, and the opening is located above the V-shaped groove 201 and is close to the length of the blackboard outer frame 2, so that the dirt and excess water generated by the cleaning mechanism 3 can drip into the V-shaped groove 201 through the opening, and gather along the inclined surface of the V-shaped groove 201 to the confluence of the two V-shaped grooves 201.

[0069] In this embodiment, the soft panel component 1 and the cleaning mechanism 3 are both arranged in the blackboard outer frame 2, and at least one group of soft panel components 1 and cleaning mechanism 3 is arranged in the blackboard outer frame 2; wherein the soft panel component 1 can be arranged in a group with the cleaning mechanism 3, that is, one soft panel component 1 is configured with one cleaning mechanism 3, or multiple soft panel components 1 can be configured with one cleaning mechanism 3, and no further limitation is made here.

[0070] In the above scheme, the design of the V-shaped groove 201 allows the dirt and excess water generated when cleaning the blackboard to be effectively collected. By setting a transverse groove on the bottom plate, the dirt and excess water generated by the cleaning mechanism 3 when erasing the contents on the blackboard surface can directly drip into the V-shaped groove 201, thereby improving the cleaning efficiency. The frame structure formed by the top plate, bottom plate and two side plates of the blackboard outer frame 2 not only provides support and protection for the soft board assembly 1 and the cleaning mechanism 3, but also enhances the structural stability and durability of the entire blackboard system.

[0071] like Figure 1-2 As shown, in the preferred scheme, the soft board surface assembly 1 includes: a soft board surface 111 and a transmission belt 112, wherein the soft board surface 111 is arranged in the vertical direction, and the soft board surface 111 is attached to the surface of a pair of transmission belts 112 arranged at intervals, and the transmission belt 112 drives the soft board surface 111 to rotate in a circle. Specifically, the side surface of the soft board surface 111 is oval in shape, and the blackboard surface, i.e., the soft board surface 111, is made of high-toughness material. A transmission belt 112 is arranged on each side of the width direction of the soft board surface 111, and the soft board surface 111 is attached to a pair of transmission belts 112. When the transmission belt 112 is working, it will drive the soft board surface 111 to move together, so the used area on the blackboard surface can be automatically adjusted to the back, thereby increasing the blackboard writing area, and important content can be retained to avoid repeated writing.

[0072] In order to realize the driving of the soft board 111, a pair of pulleys 101 are respectively arranged on both sides of the transmission belt 112, and the pulleys 101 are meshed with the transmission belt 112. The upper pair of pulleys 101 are coaxially arranged on a pulley shaft 104, and the lower pair of pulleys 101 are coaxially arranged on a pulley shaft 104, and a large gear is also arranged at one end of the pulley shaft 104 located at the bottom, and the large gear is meshed with a small gear arranged on the shaft of the stepping motor 103 to realize driving the pulley shaft 104 to rotate, and then the rotation of the pulley shaft 104 drives the transmission belt 112 to rotate, and the transmission belt 112 drives the soft board 111 to rotate synchronously. In this embodiment, the motor 103 drives the meshed small gear and the large gear to provide power for the pulley shaft 104. In addition, a control system can be set up separately. The control system is connected to a control panel externally. The control system controls the motor 103 through the circuit to drive the soft board 111 to move. Each soft board component 1 can move individually or simultaneously. The motor 103 can be a stepper motor. The operation of each soft board 111 can be controlled more accurately through the control system. It can be imagined that each function controlled by the circuit system can be independently controlled through the control panel. The operation of the transmission belt 112, the action of the support mechanism 5, and the contact between the cleaning mechanism 3 and the blackboard surface can all be independently controlled through the control panel. The control system uses a circuit board, etc. The method of controlling the control system through the circuit is a prior art. Those skilled in the art can easily think of programming the circuit board according to actual needs to achieve the corresponding effect, thereby realizing the above-mentioned automatic control work, which will not be repeated here. Similarly, the external control panel is directly controlled, which is also a prior art. Those skilled in the art can set it externally according to actual needs to achieve the corresponding effect, thereby realizing the above-mentioned automatic control work, which will not be repeated here.

[0073] It is conceivable that in some alternative embodiments, the soft board 111 can be driven by the motor 103 to drive the pulley shaft 104 located above to rotate, and the large gear, small gear and motor 103 are adaptively arranged.

[0074] At the same time, the soft board assembly 1 is connected to the blackboard outer frame 2 through the connecting frame 102. Specifically, a connecting frame 102 is respectively arranged on both sides of the pulley shaft 104. It can be imagined that in order to prevent the connecting frame 102 from interfering with the rotation of the pulley shaft 104, a first sleeve 105 is arranged at the connection between the connecting frame 102 and the pulley shaft 104. The pulley shaft 104 is connected to the inner wall of the blackboard outer frame 2 through the connecting frame 102. The pulley shaft 104 located at the top is connected to the top plate of the blackboard outer frame 2, and the pulley shaft 104 located at the bottom is connected to the bottom plate of the blackboard outer frame 2.

[0075] In this embodiment, the traditional blackboard is improved, and the traditional blackboard surface is replaced by a composite structure composed of a transmission belt 112 and a soft board surface 111. The soft board surface 111 is driven by the transmission belt 112 to rotate in a circular manner. The used area on the blackboard surface can be automatically adjusted to the rear, so that writing can continue without erasing the written content, thereby greatly increasing the blackboard writing area, and important content can be retained to avoid repeated writing, which not only improves writing efficiency but also saves time in wiping the blackboard; the motor 103 drives the pulley shaft 104 to rotate, thereby driving the transmission belt 112 and the soft board surface 111 to rotate. The entire operation process has a high degree of automation and is easy to use.

[0076] In a feasible embodiment, a set of soft board components 1 can be integrally arranged in the blackboard outer frame 2. As an alternative, two sets of soft board components 1 can be arranged in the blackboard outer frame 2, and the two sets of soft board components 1 are arranged in a colinear manner or in parallel with each other.

[0077] In some replaceable embodiments, the software board component 1 can also be movably connected to the blackboard external frame 2; in order to realize the above-mentioned connection method, correspondingly, tracks are arranged on the top plate and the bottom plate, so that the software board 111 can be connected to the track and move along the track; at the same time, at least one group of software board components 1 is connected to the blackboard external frame 2. The connecting frame 102 connected to the blackboard external frame 2 is provided with a roller 501 on one side, and the roller 501 can move along the track and thereby drive the software board component 1 to move.

[0078] like Figure 1-2 As shown, in this preferred scheme, two groups of software board components 1 are arranged in the outer frame 2 of the blackboard, and the two groups of software board components 1 are arranged in parallel and staggered. One group of software board components 1 is provided with rollers 501 on the connecting frame 102 connected to the outer frame 2 of the blackboard, and the position of the other group of software board components 1 remains fixed. That is, the blackboard in this embodiment is composed of a movable plate (i.e. a group of software board components 1 movably connected to the outer frame 2 of the blackboard) and a fixed position plate (i.e. a group of software board components 1 fixedly connected to the outer frame 2 of the blackboard), both of which are circulating automatic blackboard surfaces; and a projection screen 203 is arranged on the rear side of the software board component 1 that is rollingly connected to the outer frame 2 of the blackboard. When it is needed, the software board component 1 in front of the projection screen 203 can be pushed so that the use of the projection screen 203 is not affected.

[0079] In the above scheme, tracks are provided on the top plate and the bottom plate, and rollers 501 are installed on the connecting frame 102 of the soft board assembly 1, so that the soft board assembly 1 can move along the track; a projection screen 203 is provided on the rear side of the soft board assembly 1 which is rollingly connected to the outer frame 2 of the blackboard, so that the projection screen 203 can be used by pushing the front soft board assembly 1 when needed; by integrating the projection screen 203, the function of the blackboard is greatly expanded, and teachers or speakers can display PPT, videos or other multimedia content while writing, thereby improving teaching effectiveness and meeting efficiency.

[0080] like Figure 4-5 As shown, in the preferred scheme, the support mechanism 5 includes: a soft board main frame 127, a support plate 121, an upper spring 123 and a lower spring 124. The support plate 121 is arranged close to the front soft board surface 111, and the support plate 121 is parallel to the soft board surface 111, so as to achieve the function of supporting the soft board surface 111 from the inside of the soft board surface 111. The side of the support plate 121 facing away from the soft board surface 111 is connected to the soft board main frame 127 through a plurality of support plate connecting rods 122.

[0081] One end of the upper spring 123 is connected to the side of the support plate 121 facing away from the soft board surface 111 or above the topmost support plate connecting rod 122, and the other end of the upper spring 123 is connected to the soft board main frame 127 above the connection between the support plate connecting rod 122 and the soft board main frame 127. The upper spring 123 drives the support plate 121 forward to support the soft board surface 111.

[0082] Correspondingly, one end of the lower spring 124 is connected to the side of the support plate 121 away from the soft board surface 111 or below the support plate connecting rod 122 at the bottom, and the other end of the lower spring 124 is provided with an electromagnetic pull rod 125, and one end of the electromagnetic pull rod 125 is located inside the lower spring 124, and an electromagnet 126 is also provided on the soft board main frame 127 below the connection between the support plate connecting rod 122 and the soft board main frame 127. The electromagnet 126 and the end of the electromagnetic pull rod 125 away from the lower spring 124 are spaced apart. The electromagnetic pull rod 125 is attracted by electricity through the electromagnet 126, and then the support plate 121 is driven to be recovered through the support plate connecting rod 122, thereby realizing the recovery movement of the four-bar mechanism.

[0083] The soft board main frame 127, the support plate 121 and the support plate connecting rod 122 constitute a four-bar mechanism. The soft board main frame 127 is a frame, and the support plate 121 is a connecting rod 34. The position can be adjusted and its work can be controlled independently, and it can provide support for the cyclic rotation of the blackboard surface.

[0084] Since the improved blackboard surface is hollow inside due to the structure of the transmission belt 112, the surface rigidity may be insufficient, so the four-bar mechanism can be controlled to provide support for the surface when writing on the blackboard. When writing, the support plate 121 fits the inner side of the soft board surface 111. Since the support mechanism 5 will affect the operation of the transmission belt 112 when it is working, the support mechanism 5 needs to be set to the original storage state when controlling the operation of the transmission belt 112 to avoid affecting the operation of the transmission belt. By energizing the electromagnet 126, the electromagnet 126 absorbs the electromagnetic pull rod 125 when it is energized, so that the lower spring 124 applies a force greater than the upper spring 123 under the action of the magnetic force, so that the four-bar mechanism operates, and the support plate 121 moves backward relative to the soft board surface 111, so that the support plate 121 is retracted, realizing the recovery movement of the four-bar mechanism, thereby freely controlling the operation of the support mechanism 5; this When the electromagnet 126 is not energized, the lower spring 124 no longer works and does not apply any force. The four-bar mechanism is only acted upon by the pulling force of the upper spring 123. The upper spring 123 drives the support plate 121 to move closer to the soft board surface 111 and return to the supporting position. At this time, the angle between the support plate connecting rod 122 and the soft board main frame 127 is 90°, that is, the support connecting rod 34 is perpendicular to the soft board main frame 127. During the entire process, the maximum angle between the support plate connecting rod 122 and the soft board main frame 127 is 90°, that is, the movement angle of the support plate connecting rod 122 is less than or equal to 90°.

[0085] Among them, multiple soft board main frames 127 are arranged parallel to the support plate 121. In the present embodiment, there are two soft board main frames 127 in total. Each soft board main frame 127 is connected to the support plate 121 through a pair of support plate connecting rods 122, and the pair of support plate connecting rods 122 on the two soft board main frames 127 are respectively arranged on the same horizontal plane, and the two ends of the support plate connecting rods 122 are respectively rotatably connected to the support plate 121 and the soft board main frame 127. Specifically, the support plate connecting rods 122 can be respectively provided with rotating shafts to realize the connection with the support plate 121 and the soft board main frame 127.

[0086] like Figure 6 As shown, the two sides of the length direction of the soft board main frame 127 are respectively connected to the upper pulley shaft 104 and the second sleeve 106 outside the lower pulley shaft 104, and the second sleeve 106 is arranged outside the lower pulley shaft 104 to prevent the soft board main frame 127 from affecting the rotation of the pulley shaft 104. At the same time, a crossbeam 107 is arranged parallel to the second sleeve 106 and passes through the two soft board main frames 127, and vertical beams 108 extend downward from both ends of the crossbeam 107, and the end of the vertical beam 108 away from the crossbeam 107 is connected to the first sleeve 105 at the lower pulley shaft 104, and a reinforcing plate is also arranged at the corner where the crossbeam 107 is connected to the number.

[0087] In the above scheme, a second sleeve 106 is provided on the outer sleeve of the pulley shaft 104 below to prevent the soft board main frame 127 from affecting the rotation of the pulley shaft 104, thereby ensuring the normal operation of the pulley shaft 104; the arrangement of the cross beam 107 and the vertical beam 108 improves the stability of the structure, and the cross beam 107 that runs through the soft board main frame 127 prevents the soft board main frame 127 from rotating, thereby keeping the soft board main frame 127 in a stable state to ensure the normal operation of the four-bar mechanism.

[0088] like Figure 1 , Figure 7-8 , Fig.10 As shown, in the preferred scheme, a cleaning mechanism 3 is arranged at the lower rear side of the soft board surface assembly 1 which is rollingly connected to the blackboard outer frame 2. The cleaning mechanism 3 is arranged parallel to the width direction of the soft board surface 111, and the length of the cleaning mechanism 3 is close to the width of the soft board surface 111, so that the soft board surface 111 can be cleaned at one time by cooperating with the rotation of the soft board surface 111 through the cleaning mechanism 3.

[0089] In order to realize the connection of the cleaning mechanism 3, a side bracket 33 is respectively provided at both ends of the cleaning mechanism 3, and correspondingly, a connecting rod 34 is also respectively provided at both ends of the pulley shaft 104 of the soft board assembly 1. It can be imagined that in order to prevent interference with the movement of the pulley shaft 104, the connecting rod 34 is connected to the first sleeve 105 of the lower pulley shaft 104; the connecting rod 34 is connected to the side bracket 33 to realize the connection of the cleaning mechanism 3 with the soft board assembly 1, and the cleaning mechanism 3 is installed at the lower rear side of the soft board 111. Specifically, one end of the connecting rod 34 away from the side bracket 33 is sleeved on the first sleeve 105, and one end of the connecting rod 34 away from the pulley shaft 104 is provided with a groove, and one end of the side bracket 33 is arranged in the groove and moves along the groove to approach and away from the soft board 111.

[0090] like Figure 7-8 As shown, a side of the side bracket 33 close to the soft plate surface 111 also extends a side wall in the direction parallel to the connecting rod 34, and the side wall as a whole is located above the connecting rod 34; a serration is provided on the upper end surface of the side wall, and the serration is meshed with the rotating knob 36. It can be imagined that a gear serration is also provided on the rotating knob 36 to mesh with the serration on the side wall, and the distance of the side bracket 33 relative to the soft plate surface 111 is controlled by rotating the knob 36; at the same time, the cleaning mechanism 3 can be fixed behind the movable plate by controlling the knob 36.

[0091] In the above scheme, the cleaning mechanism 3 is installed on the outer side of the rear of the movable plate, and the cleaning mechanism 3 is set parallel to the width direction of the soft board surface 111. The soft board surface 111 is driven to move by controlling the transmission belt 112, and sliding friction occurs with the cleaning mechanism 3 to achieve the function of automatically cleaning the blackboard, which greatly improves the cleaning efficiency; through the cooperation of the connecting rod 34 and the side bracket 33, the side bracket 33 can move forward and backward through the groove, so that the cleaning mechanism 3 can move towards and away from the soft board surface 111 under the drive of the side bracket 33, and the distance of the side bracket 33 relative to the soft board surface 111 is controlled by turning the knob 36, so that the distance between the cleaning mechanism 3 and the soft board surface 111 is adjustable, thereby controlling whether the cleaning mechanism 3 is in contact with the blackboard, so that the content on the blackboard surface can be selectively retained at any time without being cleared; the connection structure is simple, which improves the flexibility and adaptability of the cleaning mechanism 3.

[0092] Specifically, the cleaning mechanism 3 includes: a wiper 311, a wiper mounting frame 312, a blackboard eraser 322, a blackboard eraser mounting frame 321 and a water pump 404, wherein the wiper mounting frame 312 and the blackboard eraser mounting frame 321 are both arranged along the width direction of the soft board surface 111, and the wiper mounting frame 312 and the blackboard eraser mounting frame 321 are both arranged parallel to the width direction of the soft board surface 111, and are both equal in length to the width of a single soft board surface 111, the two sides of the wiper mounting frame 312 and the blackboard eraser mounting frame 321 are respectively connected to a side bracket 33, the blackboard eraser mounting frame 321 and the wiper mounting frame 312 are fixed together by the side bracket 33, and the wiper mounting frame 312 is arranged above the blackboard eraser mounting frame 321. The blackboard eraser 322 and the wiper 311 are respectively installed on the grooves of their respective mounting frames. The blackboard eraser 322 and the wiper 311 can be installed on the corresponding grooves by side insertion, and the blackboard eraser 322 and the wiper 311 are also equal in length to the width of a single soft board surface 111.

[0093] In this embodiment, grooves are provided on both sides of the blackboard mounting frame and the wiper mounting frame 312, and the blackboard eraser 322 and the wiper strip are installed on the grooves of the special frame. Specifically, a wiper 311 is vertically provided on both sides of the wiper mounting frame 312 close to or away from the soft board surface 111; and a blackboard eraser 322 is provided on both ends of the blackboard eraser mounting frame 321 close to or away from the soft board surface 111. Among them, the blackboard eraser mounting frame 321 is an internal hollow structure, and the water pump 404 is connected to the inside of the blackboard eraser mounting frame 321 through multiple hoses. The water pump 404 can evenly inject water into the inside of the blackboard eraser mounting frame 321. Correspondingly, small holes that communicate with the internal hollow structure are opened on both sides of the blackboard eraser mounting frame 321 where the blackboard eraser 322 is provided, so that the water entering the inside of the blackboard eraser mounting frame 321 can soak the blackboard eraser 322 through the small holes.

[0094] In some feasible embodiments, a dry blackboard eraser 381 can also be provided on the basis of the original cleaning mechanism to increase the cleaning effect while ensuring the erasing quality and prevent water stains or other unclean places; specifically, a slot is provided on the upper end surface of each side bracket 33 to install the dry blackboard eraser side bracket 37, and correspondingly, a protruding plug is provided at the lower end of the dry blackboard eraser side bracket 37. During installation, the dry blackboard eraser side bracket 37 and the side bracket 33 can be directly installed and stacked through the slot and the plug; therefore, a pair of dry blackboard eraser side brackets 37 are provided, and a dry blackboard eraser mounting frame 382 is installed between the pair of dry blackboard eraser side brackets 37, and a dry blackboard eraser 381 is respectively provided at the two ends of the dry blackboard eraser mounting frame 382 close to or away from the soft board surface 111, and the dry blackboard eraser mounting frame 382 is arranged parallel to the width direction of the soft board surface 111, and is equal in length to the width of a single soft board surface 111, and the dry blackboard eraser 381 is also equal in length to the width of a single soft board surface 111.

[0095] In the specific working process, the water pump 404 draws water from the water tank 403, and evenly injects it into the blackboard eraser mounting frame 321 through the hose hub 35. There is a row of small holes on the groove for mounting the blackboard eraser 322. The water pump 404 injects water into the frame, and the water evenly wets the blackboard eraser 322 through the small holes. The wet blackboard eraser 322 cleans the blackboard, which can minimize the generation of dust.

[0096] In addition, a dry blackboard eraser 381 can be selectively installed on the side bracket 33 as needed to increase the cleaning effect; more cleaning tools can also be added based on the side bracket 33 according to actual use requirements to improve the effectiveness of the cleaning mechanism, which is not limited here. Among them, it can be imagined that in order to ensure the use effect of the dry blackboard eraser 381, the dry blackboard eraser side bracket 37 can be directly plugged in or the dry blackboard eraser 381 can be replaced on time to achieve the cleaning effect.

[0097] In the above scheme, grooves are provided on both sides of the blackboard mounting frame and the wiper mounting frame 312, so that the cleaning tools can be installed on both sides. Therefore, only the movable plate needs to be moved to align with the fixed plate to clean the two blackboard surfaces at the same time; by freely controlling the side bracket 33 to move back and forth along the groove in coordination with the rotating knob 36, it is thereby controlled whether the blackboard eraser 322 and the wiper 311 are in contact with the blackboard, and sliding friction occurs with the blackboard eraser 322 and the wiper on the cleaning mechanism 3, so as to achieve the function of automatically cleaning the blackboard; at the same time, the blackboard eraser 322 is soaked with water, and the wet blackboard eraser 322 is used to clean the blackboard, which can minimize the generation of dust.

[0098] like Figure 1As shown, in the preferred solution, a cleaning storage box 4 is also provided at the bottom of the blackboard outer frame 2, and the cleaning storage box 4 specifically includes: a dirt storage box 401, a filter layer 402 and a water tank 403, the dirt storage box 401 and the filter layer 402 are both arranged in the water tank 403, and a drain hole 405 is also provided below the water tank 403, and the water tank 403 is connected to the water pump 404 of the cleaning mechanism 3 through a hose to form an automatic water circulation cleaning system; the filter layer 402 wraps the dirt storage box 401 and the filter layer 402. The dirt storage box 401 is provided with a water hole. Specifically, the dirt storage box 401 is arranged below the convergence of the V-shaped groove 201, that is, a square dirt storage box 401 is installed in the center of the V-shaped groove 201. The dirt storage box 401 is an open structure. The dirt and excess water generated by the cleaning mechanism 3 directly flow into the dirt storage box 401 through the V-shaped groove 201. The dirt storage box 401 is shaped like a drawer and can be disassembled for easy regular cleaning. A transparent cover is used on the side of the water tank 403 close to the user to facilitate observation of the turbidity of the water.

[0099] In the above scheme, the excess water and dirt generated by the cleaning mechanism 3 during the cleaning process are guided by the V-shaped groove 201 into the dirt storage box 401, and then filtered by the filter layer 402. The filter layer 402 is used to filter and collect clean water into the water tank 403 again. The water pump 404 then pumps out this part of water and supplies it to the cleaning mechanism 3 for reuse, thereby realizing the recycling of water resources and greatly reducing the water resource consumption in the cleaning operation. At the same time, the chalk heads generated during the teaching process can also be directly placed in the horizontal groove opened on the bottom plate of the blackboard outer frame 2, and the chalk heads enter the dirt storage box 401 along the V-shaped groove 201 below the horizontal groove. The design of the cleaning storage box 4 enables the dirt and excess water generated during the cleaning process to be automatically collected and processed, simplifying the cleaning process.

[0100] In some feasible embodiments, a pair of rollers 501 located below the movable soft board component 1 is further provided with a roller protection cover 502, such as Figure 3 As shown, the roller protective cover 502 is spaced apart from the roller 501 and is installed on the connecting frame 102 above the roller 501, and the roller protective cover 502 is arranged on the side of the roller 501 away from the soft board surface 111, and the roller protective cover 502 protrudes toward the side away from the soft board surface 111, and the protruding position is located near the bottom of the track, and the upper end surface of the roller protective cover 502 connected to the protruding position is in an arc shape, which is convenient for fitting the closed side wall, and the roller protective cover 502 is used to push the debris on the moving path of the roller 501.

[0101] A side wall notch 202 is also provided below the two side panels of the blackboard outer frame 2. The side wall notch 202 is located at the end of the roller 501 movement track. A chalk head collection box 503 is installed below the outer side of each side wall notch 202 to store debris pushed over by the roller protection cover 502.

[0102] In the above scheme, by installing a roller protection cover 502 on the roller 501, the roller 501 reciprocates on the track within the blackboard outer frame 2, and the roller protection cover 502 can push the debris on the movement path of the roller 501, and can push away the debris on the movement path of the roller 501, and block the debris outside the roller 501, to prevent the debris from getting stuck in the roller 501 and affecting the movement of the moving plate; when the roller 501 moves to the side wall of the outer frame, the side wall notch 202 can allow the roller protection cover 502 to pass completely, and clean up the debris encountered on the movement path of the roller 501, and then the roller protection cover 502 pushes the chalk heads that fall on the movement track into the chalk head collection boxes 503 on both sides, to avoid collisions between the blackboard structures and between the blackboard structure and the debris. The design here can effectively clean up the chalk heads on the movement path of the moving plate and prevent the chalk heads from hindering its movement.

[0103] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A dust-free blackboard, characterized in that: include: A software board component (1), wherein the software board component (1) can be rotatably arranged, and the surface of the software board component (1) is used for writing; A supporting mechanism (5), wherein the supporting structure is arranged inside the software panel assembly (1) and parallel to the front side of the software panel assembly (1), and is used to support the software panel assembly (1); A cleaning mechanism (3), wherein the cleaning mechanism (3) is arranged at the lower rear side of the software panel assembly (1), and the distance of the cleaning mechanism (3) relative to the software panel assembly (1) is adjustable, and is used for selectively cleaning the contents on the surface of the software panel assembly (1).

2. A dust-free blackboard according to claim 1, characterized in that: Also includes: A blackboard outer frame (2), the blackboard outer frame (2) being a frame structure surrounded by a top plate, a bottom plate and two side plates, the bottom plate being provided with a transverse groove extending downwardly from both sides of the bottom plate of the blackboard outer frame (2) to form a V-shaped groove (201); The soft board component (1) and the cleaning mechanism (3) are both arranged in the blackboard outer frame (2), and at least one set of the soft board component (1) and the cleaning mechanism (3) is arranged in the blackboard outer frame (2).

3. A dust-free blackboard according to claim 2, characterized in that: The soft board assembly (1) comprises: a soft board (111) and a transmission belt (112); the soft board (111) is arranged in a vertical direction; the soft board (111) is attached to the surfaces of a pair of transmission belts (112) arranged at intervals; the transmission belt (112) drives the soft board (111) to rotate cyclically; A pair of pulleys (101) is disposed on each side of the transmission belt (112), and each pair of pulleys (101) is coaxially disposed on a pulley shaft (104), and a power device drives the pulley shaft (104) located on either side of the transmission belt (112) to rotate, thereby driving the transmission belt (112) to rotate; A connecting frame (102) is respectively provided on both sides of the pulley shaft (104), and the pulley shaft (104) is connected to the inner side wall of the blackboard outer frame (2) through the connecting frame (102).

4. A dust-free blackboard according to claim 3, characterized in that: The top plate and the bottom plate are provided with rails; Two groups of the soft board components (1) are arranged inside the blackboard outer frame (2), and the two groups of the soft board components (1) are arranged in a co-linear manner or in parallel with each other; At least one group of the soft board components (1) is connected to the connecting frame (102) of the blackboard outer frame (2); a roller (501) is provided on one side of the connecting frame (102) connected to the blackboard outer frame (2); and the roller (501) moves along the track; A projection screen (203) is arranged on the rear side of the soft board component (1) which is rollably connected to the blackboard outer frame (2).

5. A dust-free blackboard according to claim 3 or 4, characterized in that: The support mechanism (5) comprises: a soft board main frame (127), a support plate (121), an upper spring (123) and a lower spring (124); the support plate (121) is arranged parallel to the front side of the soft board surface (111); a side of the support plate (121) facing away from the soft board surface (111) is connected to the soft board main frame (127) via a plurality of support plate connecting rods (122) spaced vertically; One end of the upper spring (123) is connected to a side of the support plate (121) facing away from the soft board surface (111) or above the support plate connecting rod (122) located at the top, and the other end of the upper spring (123) is connected to the soft board main frame (127) located above the connection between the support plate connecting rod (122) and the soft board main frame (127); One end of the lower spring (124) is connected to the side of the support plate (121) away from the soft board surface (111) or below the support plate connecting rod (122) at the bottom, and the other end of the lower spring (124) is provided with an electromagnetic pull rod (125). An electromagnet (126) is also provided on the soft board main frame (127) below the connection between the support plate connecting rod (122) and the soft board main frame (127). The electromagnet (126) is spaced apart from the end of the electromagnetic pull rod (125) away from the lower spring (124), and the electromagnet (126) is used to energize and adsorb the electromagnetic pull rod (125); The support plate (121), a pair of support plate connecting rods (122) and the soft board main frame (127) are connected to form a four-bar mechanism, which is used to provide support for the soft board surface (111) when writing on the blackboard; when the electromagnet (126) is energized, the lower spring (124) drives the support plate (121) to move away from the soft board surface (111) under the action of magnetic force; when the electromagnet (126) is de-energized, the upper spring (123) drives the support plate (121) to move closer to the soft board surface (111).

6. A dust-free blackboard according to claim 5, characterized in that: A plurality of soft board main frames (127) are arranged parallel to the support plate (121), each of the soft board main frames (127) is connected to the support plate (121) via a pair of support plate connecting rods (122), and the two ends of the support plate connecting rods (122) are respectively rotatably connected to the support plate (121) and the soft board main frames (127); Both sides of the soft board main frame (127) in the length direction are respectively connected to the pulley shaft (104) located above and the second sleeve (106) outside the pulley shaft (104) located below; A crossbeam (107) is also provided parallel to the second sleeve (106) and passes through the plurality of soft board main frames (127), and vertical beams (108) are respectively extended downward from both ends of the crossbeam (107), and the ends of the vertical beams (108) facing away from the crossbeam (107) are connected to the pulley shaft (104) located below.

7. A dust-free blackboard according to claim 3, 4 or 6, characterized in that: The cleaning mechanism (3) is arranged at the lower rear side of the soft board component (1) which is rollingly connected to the blackboard outer frame (2), and the cleaning mechanism (3) is arranged parallel to the width direction of the soft board (111); A side bracket (33) is respectively provided at both ends of the cleaning mechanism (3); a connecting rod (34) is also vertically provided at both ends of the pulley shaft (104) below, and a groove is provided at one end of the connecting rod (34) away from the pulley shaft (104); One end of the side bracket (33) is arranged in the groove and moves along the groove to approach and move away from the soft board surface (111); the cleaning mechanism (3) is installed at the lower rear side of the soft board surface (111) through the side bracket (33) and the connecting rod (34); A side wall is also extended from the side of the side bracket (33) close to the soft board surface (111) in a direction parallel to the connecting rod (34), and a sawtooth is arranged on the upper end surface of the side wall. The sawtooth is meshed with a rotating knob (36), and the distance of the side bracket (33) relative to the soft board surface (111) is controlled by the rotating knob (36).

8. A dust-free blackboard according to claim 7, characterized in that: The cleaning mechanism (3) comprises: a wiper (311), a wiper mounting frame (312), a blackboard eraser (322), a blackboard eraser mounting frame (321) and a water pump (404); the wiper mounting frame (312) and the blackboard eraser mounting frame (321) are both arranged along the width direction of the soft board surface (111); both sides of the wiper mounting frame (312) and the blackboard eraser mounting frame (321) are respectively connected to one of the side brackets (33); the wiper mounting frame (312) is arranged above the blackboard eraser mounting frame (321); A wiper (311) is vertically arranged on both sides of the wiper mounting frame (312) close to or away from the soft board surface (111); The blackboard eraser mounting frame (321) is provided with a blackboard eraser (322) at two ends close to or away from the soft board surface (111). The blackboard eraser mounting frame (321) is an internal hollow structure, the water pump (404) passes water into the interior of the blackboard eraser mounting frame (321) through a plurality of hoses, and the blackboard eraser mounting frame (321) is provided with small holes communicating with the internal hollow structure on both sides thereof, so as to wet the blackboard eraser (322); Or, the cleaning mechanism (3) comprises: a wiper (311), a wiper mounting frame (312), a blackboard eraser (322), a blackboard eraser mounting frame (321), a dry blackboard eraser (381), a dry blackboard eraser mounting frame (382), a dry blackboard eraser side bracket (37) and a water pump (404), the wiper mounting frame (312) and the blackboard eraser mounting frame (321) are both arranged along the width direction of the soft board surface (111), the two sides of the wiper mounting frame (312) and the blackboard eraser mounting frame (321) are respectively connected to one of the side brackets (33), and the wiper mounting frame (312) is arranged above the blackboard eraser mounting frame (321); A wiper (311) is vertically arranged on both sides of the wiper mounting frame (312) close to or away from the soft board surface (111); The blackboard eraser mounting frame (321) is provided with a blackboard eraser (322) at two ends close to or away from the soft board surface (111). The blackboard eraser mounting frame (321) is an internal hollow structure, the water pump (404) passes water into the interior of the blackboard eraser mounting frame (321) through a plurality of hoses, and the blackboard eraser mounting frame (321) is provided with small holes communicating with the internal hollow structure on both sides thereof, so as to wet the blackboard eraser (322); The upper end surface of each side bracket (33) is provided with a slot, and the dry blackboard eraser side bracket (37) is inserted into the slot. The dry blackboard eraser mounting frame (382) is provided between a pair of the dry blackboard eraser side brackets (37). The dry blackboard eraser mounting frame (382) is provided with a dry blackboard eraser (381) at each end close to or away from the soft board surface (111).

9. A dust-free blackboard according to claim 8, characterized in that: A clean storage box (4) is also provided at the bottom of the blackboard outer frame (2), and the clean storage box (4) comprises: a dirt storage box (401), a filter layer (402) and a water tank (403), and the dirt storage box (401) and the filter layer (402) are both arranged in the water tank (403); The dirt collection box (401) is arranged below the convergence point of the V-shaped groove (201), and the dirt collection box (401) is coated with the filter layer (402), and the filter layer (402) is used to filter and collect clean water back into the water tank (403); The water tank (403) is connected to the water pump (404) via a hose.

10. A dust-free blackboard according to claim 4, characterized in that: A pair of rollers (501) located at the bottom are also provided with roller protection covers (502), the roller protection covers (502) being provided on the side of the rollers (501) away from the soft board surface (111), and the roller protection covers (502) being used to push away debris on the moving path of the rollers (501); Side wall notches (202) are also provided below the two side panels of the blackboard outer frame (2), and a chalk head collection box (503) is provided below the outer side of each side wall notch (202), and the chalk head collection box (503) is used to store debris pushed over by the roller protection cover (502).

Images