CN201280015Y - Absorbent blackboard eraser convenient to discharge dust - Google Patents

Abstract

A dust-absorbing blackboard eraser that is convenient for dust removal. The upper part of the shell is equipped with a power switch, the lower part is connected to the hollow shell, the bottom is equipped with a brush, and a rubber dust-proof frame is fixed around the brush. The tail of the blackboard eraser is connected to a dust bag. Blackboard eraser A small motor, a battery, and arc blades are installed in the interior sequentially from top to bottom, and the arc blades are located in the dust collection chamber at the lower part of the housing. Its main feature is that the dust collection chamber adopts a hollow shell, surrounded by filter cloth, and a rotary air lock is installed at the end of the dust collection chamber and connected to the dust collection bag. The utility model is an improvement to the traditional dust-absorbing blackboard eraser, which solves the problem of pressure balance in the dust collection chamber by using the hollow shell and filter cloth, and realizes automatic dust discharge by using the rotary air locker. It can be conveniently used by teachers and students in teaching activities, reduce indoor dust pollution, and ensure the health of teachers and students.

Description

Vacuum blackboard eraser for easy dust removal

technical field

The utility model relates to a dust-absorbing blackboard eraser which is convenient for dust removal, and belongs to the field of teaching supplies.

Background technique

Blackboard eraser is an essential product in teaching. Ordinary blackboard eraser is small and light, suitable for teachers to erase or partially modify blackboard writing, but it will cause chalk dust to fly and pollute the indoor air environment. If it goes on for a long time, it will affect the health of teachers and students healthy. Therefore, a lot of people design and invent novel blackboard eraser to solve this problem, and electric vacuum blackboard eraser is exactly a common one. However, the general electric vacuuming blackboard eraser only focuses on dust collection. When the motor drives the blades to rotate for dust collection, the pressure in the dust collection chamber will increase; if there is no air outlet, the settling chamber will become positive pressure, and the dust will be difficult to be inhaled. , so the air leakage device should be used to balance the pressure in the settling chamber.

Contents of the invention

In order to solve the problem of pressure balance in the settling chamber, the utility model adopts a hollow shell, which can effectively maintain the pressure balance in the dust collection chamber. dust.

The technical solution adopted by the utility model to solve its technical problems is: a power switch is installed on the upper part of the housing, the lower part is connected to the hollow shell, and a brush is installed on the bottom, a circular air inlet is opened in the middle of the brush, and rubber baffles are fixed around the brush Gray frame, the tail of the blackboard eraser is connected to the dust bag. A small (3V) motor, a battery, and arc blades are installed inside the blackboard eraser from top to bottom, wherein the small (3V) motor and battery are located at the upper part of the housing, and the arc blades are located in the dust collection chamber at the lower part of the housing. The dust collecting chamber adopts a hollow shell, and filter cloths are arranged around it, and a rotary air lock (12) is installed at the end of the dust collecting chamber (11) and is connected to the dust collecting bag (5).

The motor is driven by a battery, which drives the blades to rotate so that the surrounding air forms a rising vortex airflow. The dust moves with the airflow and enters the dust collection chamber from the air inlet at the bottom of the casing. The dust that moves with the airflow will be blocked by the filter cloth. The filter cloth can be made of nylon fabric, polyester, orlon and other materials, which have low resistance, long service life, low cost and high efficiency. A rotary air lock is installed at the end of the dust collecting chamber. When the dust at the end of the dust collecting chamber accumulates to a certain amount, it will press the scraper to rotate slowly and transfer the dust to the dust collecting bag to realize automatic dust discharge.

The beneficial effect of the utility model is that the utility model improves the traditional electric dust-absorbing blackboard eraser, and can be used for teaching more conveniently without causing dust to fly everywhere, so as to ensure the health of teachers and students.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is the front view of the utility model.

Fig. 2 is a cross-sectional structure diagram of the utility model.

Figure 3 is a structural diagram of the rotary air locker.

In the figure 1. Shell, 2. Power switch, 3. Hollow shell, 4. Rubber gray frame, 5. Dust bag, 6. Small (3V) motor, 7. Battery, 8. Arc blade, 9. Filter cloth, 10. Brush, 11. Dust collecting chamber, 12. Rotary air locker, 13. Air inlet, 14. Dust exhaust channel, 15. Scraper.

Detailed ways

In Fig. 1, a power switch (2) is installed on the upper part of the housing (1), the hollow shell (3) is connected to the lower part, a rubber dust retaining frame (4) is fixed on the bottom edge, and the dust bag (5) is connected to the tail of the blackboard eraser.

In Fig. 2, a small (3V) motor (6), a battery (7), and arc blades (8) are sequentially installed inside the blackboard eraser from top to bottom, wherein the small (3V) motor (6) and battery (7) Located in the casing (1), the arc blades (8) are located in the dust collecting chamber (11). The dust collection chamber (11) adopts a hollow shell (3), and filter cloths (9) are arranged around it; a brush (10) is installed at the bottom of the dust collection chamber (11), and a circular air inlet ( 13); The tail of the dust chamber (11) is equipped with a rotary air lock (12) and is connected to the dust bag (5).

In Figure 3, the dust falls from the dust collection chamber (11) into the groove between the scrapers through the dust discharge channel (14). inside the bag (5).

When using the utility model to wipe the blackboard, first turn on the power switch (2), and the battery (7) starts to drive the small (3V) motor (6) to work, thereby driving the circular arc blade (8) to rotate, so that the surrounding air forms a rising vortex Swirling airflow, dust enters in the dust collecting chamber (11) from having circular air inlet (13) in the middle of the hairbrush (10) along with the airflow. In the dust collecting chamber (11), the airflow detached from the arc blades (8) will spread around due to inertia and be discharged from the hollow casing (3), while the dust moving with the airflow will be blocked by the filter cloth (9), so that It not only ensures the pressure balance in the dust collection chamber (11), but also does not cause air pollution. When wiping the blackboard, the eraser is tilted, and the dust will accumulate at the end of the dust collector due to gravity, and fall into the groove between the scrapers through the dust discharge channel (14), and when it accumulates to a certain amount, the scraper will be pushed to rotate slowly , thereby dust is sent in the dust bag (5), has realized automatic dust discharge. Due to the blocking effect of the rubber dust-blocking frame (4) around the hairbrush (10), it is difficult to cause a large area of dust to fly when wiping the blackboard, thereby ensuring the cleanness of the indoor air, which is conducive to the health of teachers and students.

Claims (1)

1. A dust-absorbing blackboard eraser that is convenient for dust removal. The upper part of the housing (1) is equipped with a power switch (2), the lower part is connected to the hollow shell (3), the bottom is equipped with a brush (10), and the middle of the brush (10) is A circular air inlet (13) is provided, a rubber dust-blocking frame (4) is fixed around the brush (10), the tail of the blackboard eraser is connected to a dust bag (5), and a small motor ( 6), the battery (7), the arc blade (8), and the arc blade (8) is located in the dust collection chamber (11) at the bottom of the housing (1); the characteristic is that the dust collection chamber (11) adopts a hollow shell (3), a filter cloth (9) is arranged around, and a rotary air lock (12) is installed at the end of the dust collection chamber (11) and is connected to the dust collection bag (5).

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