Blackboard eraser with dust collection structure

Abstract

The invention discloses a blackboard eraser with a dust collection structure. The blackboard eraser comprises a shell, a driving device, a collecting device, a bottom plate and a brush. The driving device comprises a control assembly, a gravity sensor and a driving assembly; the gravity sensor is used for detecting the inclination state of the blackboard eraser and controlling starting and stopping. The collecting device comprises two collecting grooves slidably embedded in the two ends of the shell, and the inner side of the collecting device communicates with the driving assembly through a sealing structure. The bottom plate is arranged at the bottom of the shell, the middle of the bottom plate is provided with a hollow dust suction opening communicated with the driving assembly, and the brushes are distributed around the opening. Intelligent control that the blackboard eraser is used immediately after being picked up and stopped immediately after being put down is achieved through gravity sensing, the problems that dust of a traditional blackboard eraser flies and an existing dust collection product is tedious in operation and low in efficiency are effectively solved by combining the dust collection grooves in the two sides and an efficient negative pressure dust collection structure, and the blackboard eraser has the advantages of being high in automation degree, good in dust collection effect and convenient to clean and maintain.

Description

Technical Field

[0001] This invention relates to the field of teaching aids technology, specifically a blackboard eraser with a dust-collecting structure. Background Technology

[0002] Blackboard erasers are an indispensable basic tool in teaching activities, and their core function is to erase chalk writing on the blackboard. Currently, traditional ordinary blackboard erasers still dominate teaching scenarios. These erasers have a simple structure, consisting only of a shell and a brush, and lack necessary intelligent design and dust handling functions. They have significant drawbacks when used: the erasing process generates a large amount of chalk dust, which not only pollutes the teaching environment but can also be inhaled by teachers and students, potentially causing health problems with long-term exposure; moreover, the dust scattered on the desktop and floor requires additional cleaning, increasing the workload of teaching support.

[0003] To address the dust problem, a small number of blackboard erasers with vacuuming functions have appeared on the market. However, these products generally have low levels of intelligence and fail to fundamentally solve the pain points of traditional products. On the one hand, existing vacuuming blackboard erasers mostly rely on manual switches to control the vacuuming device, which is cumbersome. Users need to frequently switch the switch during erasing, which can easily lead to forgetting to turn it off, wasting energy, or forgetting to turn it on while still generating dust. On the other hand, some products have unreasonable vacuuming structure designs, resulting in insufficient suction power, low dust collection efficiency, and poor sealing performance between the collection components and the vacuuming channel, which can easily lead to dust leakage or accumulation inside the device, affecting the lifespan of the equipment. At the same time, existing products generally lack user-friendly design, such as the base plate material being not wear-resistant and easily scratching the blackboard, and the collection tray being inconvenient to disassemble and clean.

[0004] In summary, current mainstream blackboard erasers lack intelligent features, and even the few improved products fail to achieve an organic combination of "intelligent control + efficient dust collection + convenient use," thus failing to meet the demands of modern education for environmentally friendly, efficient, and convenient teaching tools. Therefore, there is an urgent need for a blackboard eraser with intelligent automatic control, excellent dust collection, and convenient use and maintenance to fill the gap in existing technology. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a blackboard eraser with a dust-collecting structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, a specific embodiment of the present invention provides a blackboard eraser with a dust-collecting structure, comprising a housing, a driving device, a collecting device, a base plate, and a brush, wherein: the driving device includes a control component, a gravity sensor, and a driving component; the control component is fixedly disposed inside the upper part of the housing; the gravity sensor is fixedly disposed inside the upper part of the housing and electrically connected to the control component, used to detect the usage status of the blackboard eraser and send start / stop signals to the control component; the driving component is fixedly disposed inside the housing, located below the control component and the gravity sensor; the collecting device includes two collecting slots, which are slidably embedded in the two ends of the housing, and the inner ends of the two collecting slots are respectively connected to the two end openings of the driving component; the base plate is fixedly disposed at the bottom of the housing, and the base plate has a hollow structure in the middle, which communicates with the air inlet of the driving component; the brush is fixedly disposed at the bottom of the base plate and distributed around the hollow structure of the base plate.

[0007] This application provides a blackboard eraser with a dust-collecting structure. Through a gravity sensor, it achieves intelligent automatic control, allowing for "pick up and use, put down and stop," eliminating the need for manual operation, greatly improving ease of use and avoiding energy waste. Its internal design employs a high-efficiency negative pressure dust collection system, combined with a double-sided sealed dust collection trough and a conical air duct, significantly improving dust collection efficiency and preventing leakage. The overall structure is compact and reasonable, the dust collection trough is easy to disassemble, and the base plate is treated with wear resistance and rounded corners. While achieving efficient and environmentally friendly cleaning, it also considers durability, ease of maintenance, and safety, effectively meeting the needs of modern teaching.

[0008] In addition, the blackboard eraser with a dust-collecting structure proposed in this application may also have the following additional technical features:

[0009] In one embodiment of this application, the control component includes a circuit board, a battery, and a main switch, wherein: the circuit board is fixedly disposed inside the upper part of the housing; the battery is fixedly disposed inside the upper part of the housing and electrically connected to the circuit board; and the main switch is disposed on the outer wall of the housing and electrically connected to the circuit board.

[0010] In one embodiment of this application, the drive assembly includes a dust collector and a turbine fan, wherein: the dust collector is fixedly disposed within the housing, the dust collector has dust collection outlet channels at both ends, and a hollow cavity is provided in the middle of the dust collector; the turbine fan is fixedly disposed within the hollow cavity of the dust collector by a bracket, and is used to generate negative pressure suction.

[0011] In one embodiment of this application, the outer ends of the two collection slots are respectively provided with snap-fit ​​buckles, and the outer shell is provided with matching snap-fit ​​grooves at the positions of the snap-fit ​​buckles. The snap-fit ​​buckles and snap-fit ​​grooves are engaged to fix the collection slots. The inner ends of the two collection slots are respectively provided with inlets. The inlets are hollow tubular structures with sealing rings on their outer circumference. The end of the dust collection outlet channel is inserted into the inlet and tightly fitted with the sealing ring to form a sealed connection. The hollow inner cavity of the inlet is interconnected with the internal channel of the dust collection outlet channel, allowing dust to pass through smoothly. When cleaning dust, the snap-fit ​​buckles are pressed to disengage the body from the snap-fit ​​grooves, and the collection slots are pulled out of the outer shell. When vacuuming, the negative pressure generated by the turbine fan draws the dust into the dust collector through the hollow structure of the bottom plate, and then into the collection slots for storage through the dust collection outlet channel and the inlet.

[0012] In one embodiment of this application, a top cover plate is detachably snapped onto the top of the housing.

[0013] In one embodiment of this application, the dust collection outlet channel of the dust collector has a tapered structure that gradually narrows.

[0014] In one embodiment of this application, the edge of the base plate is provided with a rounded corner transition structure, and the base plate is made of wear-resistant ABS plastic material.

[0015] In one embodiment of this application, the gravity sensor is configured to: send a start signal to the control component when it detects that the tilt angle of the blackboard eraser relative to the horizontal plane is within a preset working angle range; and send a stop signal to the control component when it detects that the tilt angle has deviated from the preset working angle range and has lasted for a preset time.

[0016] The advantages of this invention compared to existing technologies are:

[0017] (1) This invention addresses the core problem of the lack of intelligence in existing ordinary blackboard erasers by adding a gravity sensor to achieve intelligent automatic control. It eliminates the need for manual operation of the vacuuming device to start and stop, making it more convenient to use and avoiding energy waste, thus filling the intelligent shortcomings of traditional products.

[0018] (2) The turbine fan in the drive assembly generates a stable negative pressure suction force. Combined with the hollow structure of the base plate and the through design of the drive assembly, the dust suction path is direct and efficient. The dust collection outlet channel adopts a tapered cone structure, which can enhance the airflow speed and further improve the dust conveying and collection efficiency, solving the problems of dust flying and poor dust collection effect of traditional products.

[0019] (3) The collection tank adopts a sliding embedding + snap-fit ​​fixing structure, which is convenient for disassembly and cleaning; the inlet and dust collection outlet channels are sealed and connected by a sealing ring, which not only ensures smooth dust flow but also prevents leakage and accumulation, thus extending the service life of the equipment.

[0020] (4) The removable top cover of the outer shell facilitates the inspection and maintenance of internal components; the bottom plate is made of wear-resistant ABS plastic and the edges are rounded to enhance durability and prevent scratching the blackboard, thereby improving the practicality and user-friendly experience of the product.

[0021] (5) The overall structure is compact and reasonable, and the components work together to achieve the integrated function of "intelligent control + efficient dust collection + convenient maintenance", which meets the environmental protection and efficiency requirements of modern teaching scenarios and has wide application value.

[0022] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A three-dimensional blackboard eraser with a dust-collecting structure is shown in one embodiment of the present invention. Figure 1 ;

[0025] Figure 2 A three-dimensional blackboard eraser with a dust-collecting structure is shown in one embodiment of the present invention. Figure 2 ;

[0026] Figure 3 A three-dimensional blackboard eraser with a dust-collecting structure is shown in one embodiment of the present invention. Figure 3 ;

[0027] Figure 4 This is a bottom view of a blackboard eraser with a dust-collecting structure according to an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of a blackboard eraser with a dust-collecting structure according to an embodiment of the present invention. Figure 1 ;

[0029] Figure 6 This is a schematic diagram of a blackboard eraser with a dust-collecting structure according to an embodiment of the present invention. Figure 2 ;

[0030] Figure 7 This is a schematic diagram of a blackboard eraser with a dust-collecting structure according to an embodiment of the present invention. Figure 3 ;

[0031] Figure 8 This is a schematic diagram of a blackboard eraser with a dust-collecting structure according to an embodiment of the present invention. Figure 4 ;

[0032] Figure 9 This is a schematic diagram of a blackboard eraser with a dust-collecting structure according to an embodiment of the present invention. Figure 5 ;

[0033] Figure 10 This is a flowchart illustrating the electrical control connection relationship of a blackboard eraser with a dust-collecting structure according to an embodiment of the present invention.

[0034] Figure 11 This is a flowchart illustrating the operation of a blackboard eraser with a dust-collecting structure according to an embodiment of the present invention.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Casing; 2. Drive unit; 3. Collection unit; 4. Base plate; 5. Brush; 11. Top cover; 21. Control component; 22. Gravity sensor; 23. Drive component; 31. Collection tank; 211. Circuit board; 212. Battery; 213. Main switch; 231. Dust collector; 232. Turbine fan; 2311. Dust collection outlet channel; 311. Snap-fit ​​buckle; 312. Inlet; 313. Sealing ring. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] like Figures 1 to 11 As shown, an embodiment of the present invention provides a blackboard eraser with a dust-collecting structure. Its overall shape is ergonomically designed for easy gripping. The eraser mainly includes a shell 1, a drive unit 2, a collection unit 3, a base plate 4, and a brush 5. The shell 1 serves as the main support structure, and its top is fitted with a detachable top cover 11 via a snap-fit ​​mechanism. Opening the top cover 11 allows for the installation or maintenance of internal components. The drive unit 2 provides intelligent control and dust-collecting power, the collection unit 3 stores the collected dust, and the base plate 4 and brush 5 directly contact the blackboard to perform wiping and dust removal functions.

[0039] Detailed structure and connection relationships of each component

[0040] Casing 1 and Cover

[0041] The outer casing 1 is typically made of lightweight and robust engineering plastic (such as ABS), and has multiple mounting posts and slots inside for securing internal components. The top of the outer casing 1 is open and closed by a removable top cover 11. The top cover 11 is securely connected to the outer casing 1 via a snap-fit ​​structure, ensuring overall structural stability, while allowing for easy opening by simply prying the snaps for maintenance. Both ends of the outer casing 1 have horizontal grooves that flow through the interior for mounting the collection device 3. The bottom of the outer casing 1 has mounting edges for securing the base plate 4.

[0042] Drive unit 2

[0043] The drive device 2 is the core of the present invention to realize the intelligent vacuuming function. It is integrated inside the upper part of the outer shell 1 and mainly includes the control component 21, the gravity sensor 22 and the drive component 23.

[0044] Control component 21: Its core is a circuit board 211, which integrates necessary electronic components such as a microprocessor and a power management module. The circuit board 211 is fixed to a mounting post at the upper part of the interior of the housing 1 with screws. A rechargeable lithium battery 212 is also fixed to the upper part of the interior of the housing 1 and is connected to the power interface on the circuit board 211 via wires to power the entire system. A master switch 213 is located on the side wall of the housing 1, with its button part exposed and internally connected to the circuit board 211 via wires, used to control the on / off state of the entire circuit.

[0045] Gravity sensor 22: It is an independent sensor module (such as a triaxial accelerometer), also fixedly mounted inside the upper part of the housing 1, near the circuit board 211, and electrically connected to the main control chip on the circuit board 211 via a flexible circuit board. Gravity sensor 22 is used to detect the changes in the attitude angle of the blackboard eraser in space in real time.

[0046] Drive assembly 23: Located below control assembly 21 and gravity sensor 22. It includes a dust collector 231 and a turbine fan 232. The dust collector 231 is a hollow shell structure, fixed to the center of the outer casing 1 by screws. A circular dust inlet is located at the upper center of the dust collector 231, which faces the opening at the bottom of the outer casing 1. Dust collector 231 has horizontally extending dust collection outlet channels 2311 at both ends. In this embodiment, the dust collection outlet channels 2311 are preferably tapered tube structures, which can accelerate airflow and improve dust conveying efficiency. The turbine fan 232 is suspended and fixed at the center of the cavity in the middle of the dust collector 231 by a cross-shaped bracket. Its power cord is connected to a circuit board 211, which controls its start / stop and speed.

[0047] Collection device

[0048] The collection device 3 mainly includes two collection troughs 31 that are identical in shape and size. The two collection troughs 31 are inserted into the interior of the outer casing 1 in parallel through horizontal sliding grooves at both ends of the outer casing 1. Each collection trough 31 is a drawer-type container with one end open.

[0049] On the outer wall of its outer end (i.e. the end near the end of the outer casing 1), there is a snap fastener 311 with elasticity.

[0050] A hollow tubular inlet 312 is provided at its inner end (i.e., the end that is inserted into the housing 1). To ensure airtightness, an annular sealing ring 313 is fitted around the tubular structure of the inlet 312. The sealing ring 313 is usually made of elastic material such as silicone.

[0051] When the collection trough 31 is fully pushed into the housing 1, its inner inlet 312 precisely inserts into the ends of the dust collection outlet channels 2311 at both ends of the dust collector 231 of the drive assembly 23. Since the diameter of the inlet 312 is slightly smaller than the inner diameter of the dust collection outlet channel 2311, the sealing ring 313 fitted onto the inlet 312 is compressed, thus forming a tight dynamic seal between the two, effectively preventing negative pressure leakage. Simultaneously, the snap fastener 311 at the outer end of the collection trough 31 clicks into the corresponding pre-set snap groove on the side wall of the housing 1, firmly locking the collection trough 31 in place. When cleaning is required, press the snap fastener 311 with your finger to cause it to elastically deform and disengage from the snap groove, allowing the collection trough 31 to be smoothly pulled out of the housing 1.

[0052] Base plate 4 and brush

[0053] The base plate 4 is a flat plate that is fixed to the bottom of the outer casing 1 with screws. A large hollow structure is cut into the center of the base plate 4, which serves as the main dust suction port. Its position is aligned vertically with and through the dust inlet of the dust collector 231 of the upper drive assembly 23. The base plate 4 is injection molded from wear-resistant ABS plastic, and all its edges, especially those in contact with the blackboard, are rounded to prevent scratching the blackboard surface during wiping. The brush 5 is smoothly attached to the bottom of the base plate 4 with a high-strength adhesive. The bristles of the brush 5 are specially designed to surround the hollow dust suction port in the center of the base plate 4, so that during wiping, the bristles guide dust towards the central suction port.

[0054] Work process and principles

[0055] The complete workflow of this blackboard eraser is as follows, with a coherent logic and a high degree of automation:

[0056] Preparation phase: The user first ensures that the main switch 213 is in the open position. At this time, the circuit board 211 of the control component 21 and the gravity sensor 22 begin to operate, but the turbine fan 232 of the drive component 23 has not yet started and is in standby mode.

[0057] Intelligent Start-up Phase: When the user picks up the blackboard eraser to wipe, the eraser's orientation changes from horizontal to a tilted angle (e.g., forming an angle of 30 to 60 degrees with the blackboard surface). Gravity sensor 22 monitors this angle change in real time. When the tilt angle enters a preset "working angle range" (this range can be pre-programmed into the chip on circuit board 211), gravity sensor 22 immediately sends a high-level "start signal" to control component 21. Upon receiving this signal, the main control chip on circuit board 211 drives the power switching circuit to supply power to turbine fan 232. Turbine fan 232 begins to rotate at high speed, generating a strong negative pressure (suction) in the central cavity of dust collector 231.

[0058] Dust collection and suction stage: The negative pressure generated by the turbine fan 232 is transmitted downwards through the dust inlet of the dust collector 231, ultimately acting on the suction port in the center of the base plate 4. When the user wipes the blackboard with the brush 5, the chalk dust generated is quickly sucked in from the suction port under the guidance of the brush bristles and the action of the airflow. The dust is carried upwards by the airflow through the dust inlet of the dust collector 231 and enters the central cavity of the dust collector 231. Due to the obstruction of the turbine fan 232 and the change in airflow direction, most of the coarser dust will initially settle due to inertia. Subsequently, the airflow carrying fine dust is divided into two streams by the suction of the turbine fan 232, entering the tapered dust collection outlet channels 2311 at both ends of the dust collector 231. The airflow is accelerated here, and then enters the inlet 312 of the two collection tanks 31 through the sealed connection, finally entering the internal cavity of the collection tank 31. As the internal space of the collection tank 31 suddenly increases, the airflow speed drops sharply. Dust settles and is stored at the bottom of the collection tank 31 under the action of gravity, while the relatively clean air continues to flow and is discharged by the turbine fan 232.

[0059] Intelligent Stop and Sleep Phase: When the user finishes wiping and places the eraser horizontally on the podium, the gravity sensor 22 detects that the tilt angle has deviated from the preset "working angle range." To avoid frequent starts and stops due to brief placement and picking up, the control component 21's program includes a delay judgment logic. That is, when the angle deviates from the range, a timer starts counting, and only after this state continues for a preset time (e.g., 3 to 5 seconds) will the gravity sensor 22 send a "stop signal" to the control component 21. The circuit board 211 then cuts off the power to the turbine fan 232, causing it to stop rotating, and the system re-enters a low-power standby state. This delay design greatly improves the user experience and saves energy.

[0060] Cleaning and maintenance phase: When the dust in the collection tank 31 is full, the user can press the latches 311 on both sides of the outer casing 1 simultaneously while the blackboard eraser is powered off, pull out the two collection tanks 31, and empty the dust into the trash can. After cleaning, push the collection tank 31 back to the bottom along the slide rail. A "click" sound indicates that it is properly installed, the sealing ring 313 will reseal, and the device can be used again. If the internal circuit needs to be inspected, the top cover 11 can be opened for operation.

[0061] It should be noted that the control method in the embodiments of this application can be automatically controlled by a controller. The control method of the controller can be implemented by simple programming by those skilled in the art, which is common knowledge in the field. Furthermore, this application is mainly used to protect mechanical structures, so the control method and circuit connection will not be explained in detail here.

[0062] The technical solution in the above-described embodiments of this application achieves intelligent automatic control of "pick up and use, put down and stop" through the gravity sensor 22, eliminating the need for manual operation, greatly improving ease of use and avoiding energy waste; its internal high-efficiency negative pressure dust collection design, combined with double-sided sealed dust collection tanks and conical air ducts, significantly improves dust collection efficiency and prevents leakage; the overall structure is compact and reasonable, the dust collection tank is easy to disassemble, and the base plate 4 is treated with wear resistance and rounded corners, achieving efficient and environmentally friendly cleaning while taking into account durability, ease of maintenance and safety of use, effectively meeting the needs of modern teaching.

[0063] Obviously, the above-described embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include these modifications and variations.

Claims

1. A blackboard eraser with a dust-collecting structure, characterized in that, It includes a housing (1), a drive unit (2), a collection device (3), a base plate (4), and a brush (5), wherein: The drive device (2) includes a control component (21), a gravity sensor (22), and a drive component (23). The control component (21) is fixedly installed inside the upper part of the outer casing (1); The gravity sensor (22) is fixedly installed inside the upper part of the housing (1) and electrically connected to the control component (21). It is used to detect the usage status of the blackboard eraser and send start / stop signals to the control component (21). The drive assembly (23) is fixedly disposed inside the housing (1) and located below the control assembly (21) and the gravity sensor (22); The collecting device (3) includes two collecting slots (31), which are slidably embedded in the two ends of the outer shell (1), and the inner ends of the two collecting slots (31) are respectively connected to the two end openings of the driving component (23). The base plate (4) is fixedly installed at the bottom of the outer shell (1). The base plate (4) has a hollow structure in the middle, which is connected to the air inlet of the drive assembly (23). The brush (5) is fixedly installed at the bottom of the base plate (4) and distributed around the hollow structure of the base plate (4).

2. The blackboard eraser with a dust-collecting structure according to claim 1, characterized in that, The control component (21) includes a circuit board (211), a battery (212), and a main switch (213), wherein: The circuit board (211) is fixedly disposed inside the upper part of the outer casing (1); The battery (212) is fixedly disposed inside the upper part of the outer casing (1) and electrically connected to the circuit board (211); The main switch (213) is located on the outer wall of the housing (1) and is electrically connected to the circuit board (211).

3. A blackboard eraser with a dust-collecting structure according to claim 1, characterized in that, The drive assembly (23) includes a dust collector (231) and a turbine fan (232), wherein: The dust collector (231) is fixedly installed inside the outer shell (1). The dust collector (231) has dust collection outlet channels (2311) at both ends and a hollow cavity in the middle. The turbine fan (232) is fixedly installed in the hollow cavity of the dust collector (231) by a bracket to generate negative pressure suction.

4. A blackboard eraser with a dust-collecting structure according to claim 3, characterized in that, The outer ends of the two collection slots (31) are respectively provided with snap fasteners (311), and the outer shell (1) is provided with matching snap fasteners (311) at the corresponding positions. The snap fasteners (311) and snap fasteners (311) are engaged with each other to fix the collection slots (31). The inner ends of the two collection tanks (31) are respectively provided with inlets (312). The inlets (312) are hollow tubular structures with sealing rings (313) on their outer periphery. The end of the dust collection outlet channel (2311) is inserted into the inlet (312) and tightly fitted with the sealing ring (314) to form a sealed connection. The hollow inner cavity of the inlet (312) is interconnected with the internal channel of the dust collection outlet channel (2311) so that dust can pass through smoothly. When cleaning dust, press the latch (311) to disengage its body from the latch groove, and pull the collection groove (31) to pull it out of the outer shell (1); When vacuuming, the negative pressure generated by the turbine fan (232) draws dust into the dust collector (231) through the hollow structure of the base plate (4), and then into the collection tank (31) for storage through the dust collection outlet channel (2311) and the inlet (312).

5. A blackboard eraser with a dust-collecting structure according to claim 1, characterized in that, The top of the outer casing (1) is detachably snapped with an upper cover plate (11).

6. A blackboard eraser with a dust-collecting structure according to claim 3, characterized in that, The dust collection outlet channel (2311) of the dust collector (231) has a tapered structure.

7. A blackboard eraser with a dust-collecting structure according to claim 1, characterized in that, The bottom plate (4) has a rounded corner transition structure at its edge, and the bottom plate (4) is made of wear-resistant ABS plastic material.

8. A blackboard eraser with a dust-collecting structure according to claim 1, characterized in that, The gravity sensor (22) is configured to: send a start signal to the control component (21) when it detects that the tilt angle of the blackboard eraser relative to the horizontal plane is within a preset working angle range; and send a stop signal to the control component (21) after it detects that the tilt angle has deviated from the preset working angle range and has lasted for a preset time.

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