CN211843875U

CN211843875U - Dust-collecting electric blackboard eraser

Info

Publication number: CN211843875U
Application number: CN201922503052.1U
Authority: CN
Inventors: 聂冰妍; 孙小波; 聂辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-11-03
Anticipated expiration: 2029-12-23

Abstract

A dust-collecting electric blackboard eraser is used for erasing chalk marks on a blackboard. A pair of parallel brush rolls are driven to rotate inwards relative to each other by a built-in motor of the blackboard eraser, chalk marks are brushed by the brush rolls when the brush rolls contact the surface of the blackboard, most chalk dust is collected in the blackboard eraser, and the chalk marks are brushed off. The efficiency and the quality of the blackboard erasing can be improved, the physical consumption of people who erase the blackboard is greatly reduced, and the environmental pollution caused by dust and the damage to the people who erase the blackboard and the health of people around the people are avoided to a great extent.

Description

Dust-collecting electric blackboard eraser

Technical Field

The utility model relates to a blackboard eraser for clean the vestige of the chalk on the blackboard.

Background

The prior common blackboard eraser mainly adopts palm fiber, felt, flannelette or sponge as wiping materials, and the gypsum powder of chalk writings wiped down forms dust which falls down into the air when the blackboard eraser is wiped, is attached to the body of people around and is sucked into the nasal cavity by people, seriously influences the surrounding environment and the sanitation of people, and also causes damage to the health of people. In addition, when the blackboard eraser is used for erasing the blackboard, people who erase the blackboard need to hold the blackboard eraser to always apply enough pressure to the blackboard, meanwhile, the upper limbs of people need to swing back and forth, the time for erasing the blackboard is long, most people can feel hard, and the erasing quality is gradually reduced.

Disclosure of Invention

In order to overcome the defects of the blackboard eraser, the utility model provides a dust-collecting electric blackboard eraser. The battery-driven motor is adopted to drive the brush roller to rotate, so that the chalk marks are brushed, and meanwhile, most of chalk dust can be collected in the blackboard eraser. Can greatly avoid dust pollution and reduce the physical consumption of people who erase the blackboard.

The utility model provides a technical scheme that its technical problem adopted is: two bristle brush rollers driven by a motor are arranged in an eraser shell in parallel through bearing support rods capable of radially yielding, and 4 rollers are arranged on the bottom surface of the eraser, so that the eraser can smoothly slide against a blackboard and keep a fixed distance; the outer surface of the brush roller exceeds the plane formed by the contact of the roller and the blackboard by 1.5 to 2.5 millimeters; one end of the brush roller is provided with a dust chamber for containing dust. When the blackboard is erased, a switch connected with a motor and a battery is switched on, the two brush rolls rotate inwards relative to each other, the blackboard eraser is held by a hand to wipe the dust chamber downwards and is attached to the blackboard, the roller is in contact with the blackboard, the blackboard eraser is moved leftwards and rightwards, palm hairs of the brush rolls sweep the surface of the blackboard, writing of chalk on the blackboard is brushed down, and most of dust of the dropped chalk falls into the dust chamber of the blackboard eraser.

The utility model has the advantages that: the pollution of dust to the environment when the blackboard is erased is greatly eliminated or reduced, the damage of the dust to the health of people is avoided, the physical consumption of people who erase the blackboard is reduced, and the efficiency and the quality of erasing the blackboard are improved.

Drawings

The present invention will be described in detail with reference to the accompanying drawings and examples.

The attached drawings are schematic structural diagrams of the embodiment of the invention, fig. 1 is a sectional view from B to B, fig. 2 is a bottom view, and fig. 3 is a sectional view of steps from A to A.

In the figure: 1. the dust chamber comprises a dust chamber cover, 2 bearing support rods, 3 connecting shafts, 4 motors, 5 switches, 6 eraser shells, 7 conducting wires, 8 battery chamber covers, 9 brush rollers, 10 batteries, 11 compression springs, 12 rollers and 13 partition plates.

Detailed Description

The shape of the blackboard eraser shell (6) is a cuboid, a partition plate (13) fixed in the blackboard eraser shell (6) is arranged in the blackboard eraser shell, the blackboard eraser shell is divided into an upper layer and a lower layer, a battery (10) is arranged in the upper layer, a battery bin cover (8) is arranged on the shell of the blackboard eraser shell (6), and the battery (10) is connected with the two motors (4) through a lead (7) and a switch (5); the partition board (13) is provided with 4 through holes; one end of each brush roller (9) is connected with the two motors (4) through two connecting shafts (3) at the lower layer of the blackboard eraser shell (6), the other ends of the two connecting shafts (3) and the two brush rollers (9) are respectively connected to the lower parts of 4 bearing support rods (2) in a sliding mode, compression springs (11) are sleeved on the bearing support rods (2), and the upper parts of the bearing support rods penetrate through holes of partition plates (13) and are stopped at the top ends of the bearing support rods; the bearing support rod (2) can slide upwards under the action of external force, and is reset under the action of the compression spring (11) when the external force is eliminated; the lower layer of the blackboard eraser shell (6) is provided with a dust chamber cover (1) opposite to the other end of the motor (4), and a space is formed between the dust chamber cover and the brush roller (9) and used for containing dust; the bottom of the blackboard eraser shell (6) is provided with 4 rollers (12).

When the blackboard is erased, the switch (5) is started, the brush rolls (9) rotate, a person erasing the blackboard places the switch (5) of the blackboard eraser at an upward position, one surface of the blackboard eraser with the roller (12) at the bottom faces the blackboard, is pressed and moves left and right, at the moment, the two brush rolls (9) rapidly rotate according to the direction shown by an arrow on the upper drawing of the drawing, and because the outer surfaces of the brush rolls (9) exceed a plane formed by the contact of the roller (12) and the blackboard, the brush rolls (9) can contact with the surface of the blackboard and erase the blackboard, so that chalk writings on the surface of the blackboard fall off from the blackboard; because the bearing support rod (2) connected with the brush roller (9) can yield when stressed, the brush roller (9) is kept in contact with the blackboard under the action of the compression spring (11), and the proper stable pressure of the brush roller (9) and the blackboard is adjusted by adjusting the elastic force of the compression spring (11); because the two brush rollers (9) rotate inwards, the fallen dust is in the space between the two brush rollers (9), and because the high-speed rotation of the brush rollers (9) can form airflow and angular momentum towards the interior of the blackboard eraser shell in the rotating direction, most of the dust is brought into and stirred into the interior of the blackboard eraser shell and then falls into the lower part of the blackboard eraser shell, namely the space between the dust chamber cover (1) and the brush rollers (9) under the action of gravity; after the wiping is finished, the switch (5) is closed, and the dust chamber cover (1) is opened, so that the dust can be poured out.

Claims

1. The electric blackboard eraser with dust collection function is composed of a battery, a motor, a brush roll, a bearing support rod, a compression spring, a connecting shaft, a blackboard eraser shell, a roller, a switch, a lead, a clapboard, a battery compartment cover and a dust compartment cover, and is characterized in that: the two brush rolls are parallel and connected to 4 bearing support rods, springs are arranged on the bearing support rods, and each brush roll is connected with a motor.

2. The dust collecting electric blackboard eraser as claimed in claim 1, wherein the two brush rolls are rotated inwardly with respect to each other and allowed to retreat inwardly by the bearing support rods connected thereto while being in contact with the blackboard and always kept in contact with the blackboard.

3. The dust-collecting electric blackboard eraser as claimed in claim 1, wherein the bottom of the eraser housing is provided with rollers.

4. The dust-collecting electric blackboard eraser as claimed in claim 1, wherein the eraser body is provided with a battery compartment cover and a dust compartment cover.