Manual blackboard eraser dust collection device

Abstract

The utility model provides a manual blackboard eraser dust collection device, which belongs to the technical field of teaching auxiliary equipment and comprises a device body, a sliding chute is arranged at the top of the device body, a dust collection port is arranged at the bottom of the sliding chute and is arranged along the width direction of the sliding chute, an air outlet is arranged on one side of the device body, and a negative pressure channel is arranged inside the device body. One end of the negative-pressure channel communicates with the dust suction inlet, the other end of the negative-pressure channel communicates with the air outlet, a dust collecting chamber, a filtering assembly and a negative-pressure fan are sequentially arranged in the negative-pressure channel in the air flowing direction, and the filtering assembly is used for preventing dust from entering the negative-pressure fan from the dust collecting chamber. According to the manual blackboard eraser dust collection device, the bristle end of a blackboard eraser sequentially passes through the dust collection opening, chalk dust attached to the bristle end is hung off through the edge of the dust collection opening and sucked into the negative pressure channel under the action of negative pressure airflow, the chalk dust is blocked by the filtering assembly in the dust collection chamber to be collected in a centralized mode, and the chalk dust cannot fly.

Description

Technical Field

[0001] The utility model belongs to the technical field of teaching auxiliary equipment, and more specifically relates to a manual blackboard eraser dust collection device. Background Art

[0002] At present, there are many kinds of school erasers, including wet erasers and dry erasers.

[0003] Among them, after the dry eraser wipes the blackboard, the surface of the eraser will be covered with a layer of chalk dust. If the chalk dust accumulates too much, it will affect the use of the eraser, and the chalk dust needs to be cleaned in time. Teachers usually take the eraser outside during class to remove the chalk dust by knocking. This cleaning method is more cumbersome and a large amount of chalk dust will fly up, affecting the environment. Utility Model Content

[0004] The utility model aims to provide a manual blackboard eraser dust suction device, aiming to solve the problem that cleaning the blackboard eraser is tedious and causes a large amount of chalk dust to fly.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a manual blackboard eraser dust collection device, including a device body, a slide groove is provided on the top of the device body, a dust collection port is provided at the bottom of the slide groove, the dust collection port is arranged along the width direction of the slide groove, an air outlet is provided on one side of the device body, a negative pressure channel is provided inside the device body, one end of the negative pressure channel is connected to the dust collection port, and the other end is connected to the air outlet, and a dust collecting chamber, a filter assembly and a negative pressure fan are sequentially provided inside the negative pressure channel along the gas flow direction, and the filter assembly is used to prevent dust from entering the negative pressure fan from the dust collecting chamber.

[0006] In one possible implementation, the dust suction port is located in the middle of the slide groove, and an induction switch is provided at the bottom of the slide groove. The induction switch is provided on the rear side of the dust suction port along the sliding direction of the eraser, and the induction switch turns on the negative pressure fan by sensing the position of the eraser.

[0007] In a possible implementation, a starting limit portion protruding from a bottom surface of the slide groove is provided at the rear end of the slide groove, and a front end of the slide groove extends horizontally to a side wall of the device body.

[0008] In one possible implementation, one end of the negative pressure channel is provided with a dust suction pipe section connected to the dust suction port, the dust collecting chamber is connected to the dust suction pipe section, the other end of the negative pressure channel is provided with an air outlet pipe section connected to the air outlet, and the negative pressure fan is connected to the air outlet pipe section.

[0009] In one possible implementation, the dust collecting chamber includes a dust inlet and an air outlet, the dust inlet is located at the top of the dust collecting chamber, the dust inlet is connected to the dust suction pipe section, the air outlet is located on one side of the dust collecting chamber, and the air outlet is connected to the negative pressure fan through the filter assembly.

[0010] In a possible implementation, the air outlet is plug-fitted into the filter assembly, and a handle is provided on a side of the dust collecting chamber away from the air outlet.

[0011] In a possible implementation, the filter assembly includes a filter layer and a filter grid, and the filter layer and the filter grid are sequentially arranged along a gas flow direction.

[0012] In a possible implementation, a supporting portion for supporting the negative pressure channel is provided inside the device body.

[0013] In a possible implementation, a slot is provided on a side of the device body away from the air outlet, and a chalk storage box for containing chalk is inserted into the slot.

[0014] In a possible implementation, a placement opening is provided on the top of the chalk storage box, and a handle is provided on the outside of the chalk storage box.

[0015] The manual blackboard eraser dust suction device provided by the utility model has the beneficial effects of: compared with the prior art, a chute is arranged at the top of the device body, a dust suction port is arranged along the width direction of the chute in the chute, and an air outlet is arranged on one side of the device body. A negative pressure channel is located inside the device body and is connected to the dust suction port and the air outlet respectively. The inside of the negative pressure channel is sequentially provided with a dust collecting chamber, a filter assembly, and a negative pressure blower along the direction of gas flow. When using the manual blackboard eraser dust suction device provided by the utility model, the bristle end of the blackboard eraser is buckled downwardly and placed on one side of the chute, the negative pressure blower is turned on, a negative pressure airflow is formed inside the negative pressure channel from the dust suction port to the air outlet, the blackboard eraser is manually moved along the length direction of the chute, the bristle end of the blackboard eraser passes through the dust suction port in sequence, the edge of the dust suction port scrapes off the chalk dust adhered to the brush end and is sucked into the negative pressure channel under the action of the negative pressure airflow, and the filter assembly blocks the chalk dust in the dust collecting chamber for centralized collection. The manual blackboard eraser dust suction device provided by the utility model can very conveniently remove chalk dust adhered to the blackboard eraser and collect it centrally without causing the chalk dust to fly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A three-dimensional diagram of a manual blackboard eraser dust collection device provided in an embodiment of the present utility model;

[0018] Figure 2 A top view of a manual blackboard eraser dust collection device provided in an embodiment of the present utility model;

[0019] Figure 3 For the Figure 2 Cross-sectional view along line AA;

[0020] Figure 4 for Figure 3 A partial enlarged view of the M in the middle;

[0021] Figure 5 A three-dimensional diagram of a chalk storage box provided in an embodiment of the present invention.

[0022] Description of reference numerals:

[0023] 100, device body; 110, slide; 111, starting limiter; 120, dust suction port; 130, air outlet; 140, sensor switch; 150, chalk storage box; 151, placement port; 152, handle;

[0024] 200, negative pressure channel; 210, dust suction pipe section; 220, dust collecting chamber; 221, dust inlet; 222, air outlet; 223, handle; 230, filter assembly; 2311, first filter layer; 2312, second filter layer; 2313, third filter layer; 232, filter grille; 240, negative pressure fan; 250, air outlet pipe section. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] In the claims, description and the above-mentioned drawings of the present utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" is to distinguish different objects rather than to describe a specific order.

[0027] In the claims, specification and the above-mentioned drawings of the present utility model, unless otherwise expressly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", "high", "low", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific scope of protection of the present utility model.

[0028] See also Figures 1 to 3 The manual blackboard eraser dust collection device provided by the utility model will now be described. The manual blackboard eraser dust collection device comprises a device body 100. A chute 110 is provided at the top of the device body 100. A dust collection port 120 is provided at the bottom of the chute 110. The dust collection port 120 is arranged along the width direction of the chute 110. An air outlet 130 is provided on one side of the device body 100. A negative pressure channel 200 is provided inside the device body 100. One end of the negative pressure channel 200 is connected to the dust collection port 120 and the other end is connected to the air outlet 130. A dust collecting chamber 220, a filter assembly 230, and a negative pressure fan 240 are sequentially provided inside the negative pressure channel 200 along the direction of gas flow. The filter assembly 230 is used to prevent dust from entering the negative pressure fan 240 from the dust collecting chamber 220.

[0029] Compared to the prior art, the manual blackboard eraser dust collection device provided by the present invention features a chute 110 located at the top of the device body 100. A dust collection port 120 is defined within the chute 110 and extends along the width of the chute 110. An air outlet 130 is also defined on one side of the device body 100. A negative pressure channel 200 is located within the device body 100 and connects the dust collection port 120 and the air outlet 130. A dust collection chamber 220, a filter assembly 230, and a negative pressure blower 240 are sequentially disposed within the negative pressure channel 200 along the direction of air flow. When using the manual blackboard eraser dust suction device provided by the utility model, the bristle end of the blackboard eraser is buckled downward and placed on one side of the chute 110, and the negative pressure blower 240 is turned on. A negative pressure airflow is formed in the negative pressure channel 200 from the dust suction port 120 to the air outlet 130. The blackboard eraser is manually moved along the length direction of the chute 110. The bristle end of the blackboard eraser passes through the dust suction port 120 in sequence. The edge of the dust suction port 120 scrapes off the chalk dust adhered to the bristle end and is sucked into the negative pressure channel 200 under the action of the negative pressure airflow. The filter assembly 230 blocks the chalk dust and collects it in the dust collection chamber 220. The manual blackboard eraser dust suction device provided by the utility model can very conveniently remove the chalk dust adhered to the blackboard eraser and collect it in a centralized manner without causing the chalk dust to fly.

[0030] The length of the dust suction port 120 is equal to the width of the chute 110. The edge of the dust suction port 120 can completely scrape away chalk dust adhering to the bristle end of the eraser. The air outlet 130 is equipped with a mesh to effectively prevent external debris from entering the negative pressure channel 200. The device body 100 is made of a lightweight material with sufficient strength and stability, such as polystyrene (PS).

[0031] See also Figures 1 to 3 The dust suction port 120 is located in the middle of the slide 110, and a sensor switch 140 is provided at the bottom of the slide 110. The sensor switch 140 is set on the rear side of the dust suction port 120 along the sliding direction of the eraser. The sensor switch 140 turns on the negative pressure fan 240 by sensing the position of the eraser.

[0032] The spacing between induction switch 140 and dust suction port 120 is less, generally not more than 5mm, and induction switch 140 adopts photoelectric induction switch 140, triggers corresponding induction signal by the position of shielding object.When the blackboard eraser moves in chute 110, at first passes through induction switch 140, and at this moment, induction switch 140 is blocked by the blackboard eraser, provides induction signal to the controller of negative pressure blower 240, and negative pressure blower 240 starts immediately, and the blackboard eraser continues to move through dust suction port 120, and chalk dust is sucked in the dust collecting chamber 220 by negative pressure passage 200. After the blackboard eraser passes through induction switch 140, induction switch 140 is no longer blocked by the blackboard eraser, provides induction signal to the controller of negative pressure blower 240, and negative pressure blower 240 closes immediately or postpones closing, and the blackboard eraser continues to move and cleans the chalk dust on the bristle end, thereby finally finishing the cleaning of chalk dust on the blackboard eraser.

[0033] In addition, the rear end of the chute 110 is provided with a starting limit portion 111 that protrudes from the bottom surface of the chute 110. The starting limit portion 111 is integrally formed on the device body 100. The upper end of the starting limit portion 111 is flush with the upper end surface of the device body 100, and the front end of the chute 110 extends horizontally to the side wall of the device body 100. The starting limit portion 111 is used to determine the starting position of the blackboard eraser, that is, the rear end of the blackboard eraser abuts against the starting limit portion 111, and the front end of the blackboard eraser is close to the sensor switch 140 but does not block the sensor switch 140. In other words, when the blackboard eraser is in the initial position, it will not trigger the sensor switch 140 to turn on the negative pressure fan 240.

[0034] Specifically, one end of the negative pressure channel 200 is provided with a dust collection pipe section 210 that is connected to the dust collection port 120, and the dust collection chamber 220 is connected to the dust collection pipe section 210. The other end of the negative pressure channel 200 is provided with an air outlet pipe section 250 that is connected to the air outlet 130, and the negative pressure fan 240 is connected to the air outlet pipe section 250. The dust collection pipe section 210 and the air outlet pipe section 250 are integrally formed with the inner wall of the device body 100. The design of the dust collection pipe section 210 and the air outlet pipe section 250 facilitates the installation of the negative pressure channel 200 within the device body 100 and connects the dust collection port 120 and the air outlet 130, respectively.

[0035] See also Figure 3 The dust collecting chamber 220 is L-shaped as a whole, the dust inlet 221 is located at the top of the dust collecting chamber 220, the dust inlet 221 is connected to the dust suction pipe section 210, the exhaust port 222 is located on one side of the dust collecting chamber 220, and the exhaust port 222 is connected to the negative pressure fan 240 through the filter assembly 230.

[0036] Specifically, when the dust collection chamber 220 is in place, the exhaust port 222 and the filter assembly 230 are axially inserted and engaged, and the dust inlet 221 is in contact with the dust collection pipe section 210. A handle 223 is provided on the side of the dust collection chamber 220 away from the exhaust port 222. By pulling the handle 223 outward, the exhaust port 222 of the dust collection chamber 220 is separated from the filter assembly 230, making it easy to remove the dust collection chamber 220 from the negative pressure channel 200 and clean the chalk dust inside the dust collection chamber 220.

[0037] See also Figure 3 and Figure 4 The filter assembly 230 includes a filter layer and a filter grille 232, which are arranged sequentially along the direction of gas flow. The filter grille 232 has multiple radial support ribs, forming a structural component that supports the filter assembly 230 and allows gas to pass through. The filter layer includes a first filter layer 2311, a second filter layer 2312, and a third filter layer 2313, which are arranged sequentially along the direction of gas flow. The first and second filter layers 2311, 2312 are each disc-shaped and bonded together. The third filter layer 2313 is a reciprocatingly curved corrugated plate, which supports and stabilizes the first and second filter layers 2311, 2312. The first filter layer 2311 is a coarse filter layer, and the second filter layer 2312 is a fine filter layer. The coarse and fine filter layers described above are relative terms, providing a dual-layer filtration system for chalk dust, preventing the passage of fine particles. The third filter layer 2313 is a HEPA filter made of laminated borosilicate microfibers that can remove particles ranging from 500 to 0.3 μm.

[0038] See also Figure 3A support portion for supporting the negative pressure channel 200 is provided inside the device body 100. The support portion is a plurality of support plates integrally formed on the bottom surface of the inside of the device body 100. The plurality of support plates are arranged side by side and a shape is formed on the upper part thereof to adapt to the outer contour of the negative pressure channel 200. The negative pressure channel 200 is welded to the support portion, which can reduce the vibration of the negative pressure channel 200 and reduce wind noise.

[0039] See also Figure 3 A slot is provided on the side of the device body 100 away from the air outlet 130. A chalk storage box 150 for holding chalk is inserted into the slot. Chalk is placed in the chalk storage box 150. When the teacher needs to use chalk, the chalk storage box 150 is pulled out of the slot, the chalk in the chalk storage box 150 is taken out, and then the chalk storage box 150 is reinserted into the slot. The chalk storage box 150 can be completely pulled out of the slot, making it easy to replace and clean. In addition, after the chalk storage box 150 is completely pulled out of the slot, the dust collection chamber 220 can be taken out from the inside of the device body 100 through the slot to replace the dust collection chamber 220 or clean the chalk dust inside.

[0040] For details, please refer to Figure 5 A placement opening 151 is provided on the top of the chalk storage box 150 to facilitate taking out chalk from the chalk storage box 150 or adding chalk to the chalk storage box 150 through the placement opening 151. A buckle 152 is provided on the outside of the storage box to facilitate pulling the chalk storage box 150 out of the slot or pushing it into the slot.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A manual eraser dust collection device, characterized in that: The invention comprises a device body (100), wherein a chute (110) is provided on the top of the device body (100), a dust suction port (120) is provided on the bottom of the chute (110), the dust suction port (120) is arranged along the width direction of the chute (110), an air outlet (130) is provided on one side of the device body (100), a negative pressure channel (200) is provided inside the device body (100), one end of the negative pressure channel (200) is connected to the dust suction port (120), and the other end is connected to the air outlet (130), and a dust collecting chamber (220), a filter assembly (230) and a negative pressure fan (240) are sequentially provided inside the negative pressure channel (200) along the gas flow direction, and the filter assembly (230) is used to prevent dust from entering the negative pressure fan (240) from the dust collecting chamber (220).

2. The manual blackboard eraser dust collection device according to claim 1, characterized in that: The dust suction port (120) is located in the middle of the chute (110); a sensing switch (140) is provided at the bottom of the chute (110); the sensing switch (140) is provided at the rear side of the dust suction port (120) along the sliding direction of the blackboard eraser; the sensing switch (140) turns on the negative pressure fan (240) by sensing the position of the blackboard eraser.

3. The manual blackboard eraser dust collection device according to claim 2, characterized in that: The rear end of the slide groove (110) is provided with a starting limit portion (111) protruding from the bottom surface of the slide groove (110), and the front end of the slide groove (110) extends horizontally to the side wall of the device body (100).

4. The manual blackboard eraser dust collection device according to claim 1, characterized in that: One end of the negative pressure channel (200) is provided with a dust suction pipe section (210) connected to the dust suction port (120), and the dust collecting chamber (220) is connected to the dust suction pipe section (210); the other end of the negative pressure channel (200) is provided with an air outlet pipe section (250) connected to the air outlet (130), and the negative pressure fan (240) is connected to the air outlet pipe section (250).

5. The manual blackboard eraser dust collection device according to claim 4, characterized in that: The dust collecting chamber (220) comprises a dust inlet (221) and an air outlet (222); the dust inlet (221) is located at the top of the dust collecting chamber (220), the dust inlet (221) is connected to the dust suction pipe section (210), and the air outlet (222) is located on one side of the dust collecting chamber (220), and the air outlet (222) is connected to the negative pressure fan (240) through the filter assembly (230).

6. The manual blackboard eraser dust collection device according to claim 5, characterized in that: The air outlet (222) is plug-fitted with the filter assembly (230), and a handle (223) is provided on a side of the dust collecting chamber (220) away from the air outlet (222).

7. The manual blackboard eraser dust collection device according to claim 1, characterized in that: The filter assembly (230) comprises a filter layer and a filter grid (232), and the filter layer and the filter grid (232) are arranged in sequence along the gas flow direction.

8. The manual blackboard eraser dust collection device according to claim 1, wherein: A supporting portion for supporting the negative pressure channel (200) is provided inside the device body (100).

9. The manual blackboard eraser dust collection device according to any one of claims 1 to 8, characterized in that: A slot is provided on a side of the device body (100) away from the air outlet (130), and a chalk storage box (150) for containing chalk is inserted into the slot.

10. The manual blackboard eraser dust collection device according to claim 9, characterized in that: The top of the chalk storage box (150) is provided with a placement opening (151), and the outer side of the chalk storage box (150) is provided with a buckle (152).

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