CN2195451Y

CN2195451Y - Blackboard eraser with absorbing chalk dust means

Info

Publication number: CN2195451Y
Application number: CN 94217169
Authority: CN
Inventors: 梁新朝
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-07-07
Filing date: 1994-07-07
Publication date: 1995-04-26
Anticipated expiration: 2004-07-07

Abstract

The utility model discloses a blackboard eraser with absorbing chalk dust means used for teaching, which is composed of a housing, the wheel of the blackboard eraser, a motor, a fan, a strainer, a dust collecting box, etc. The motor is arranged in the middle of the housing, and the front and the back ends of the shaft of the motor are respectively provided with the wheel of the blackboard eraser and the fan. The air outlet of the lower part of the housing is provided with the strainer and is connected with the dust collecting box, and the side of the housing is provided with a power switch and leads out the power line. When erased, the dust enters the housing along the airflow and is exhausted out after being filtered. The utility model solves the problem that the existing blackboard eraser has dust nuisance and wastes time and power when erasing and is used for teaching work.

Description

Blackboard eraser with absorbing chalk dust means

The utility model relates to a kind of blackboard eraser of the usefulness of imparting knowledge to students.

Existing blackboard eraser, primary structure are to plant palm fiber on the plank or be stained with felt, and its major defect is: 1) dust disorderly flies everywhere during wiping, contaminated environment, and it is healthy to influence teachers and students; 2) handwork is wasted time and energy.

The purpose of this utility model provides a kind of dust absorption blackboard eraser.It has the function of dust suction and automated job, and is time saving and energy saving, and can prevent the pollution of the environment.

The purpose of this utility model is achieved in that it is made up of blackboard eraser wheel, casing, bonnet, motor, fan, filter screen, dust-collecting box and power switch.Its design feature is that casing is middle to be equipped with motor, and blackboard eraser wheel and fan are housed respectively on the front and back end of motor shaft.The bonnet and the casing of band steam vent are assembled into one.On casing, be positioned at blackboard eraser wheel lower position and have an air inlet, be positioned at the fan lower position and have a gas outlet, filter screen is housed on the gas outlet.The casing bottom is connected with dust-collecting box, and the casing side is equipped with power switch and is had power line to draw.

The utility model can also following mode be realized: the blackboard eraser wheel is made up of wheel disc, hairbrush and spring steel wire.The hairbrush activity is contained in the hairbrush hole on the wheel disc, and one at the wheel disc back side of spring steel wire is connected with hairbrush, and the other end is stuck on the wheel disc in the locating hole.

The utlity model has following advantage: can prevent effectively that 1) the chalk dust diffusion from causing air pollution, improves teachers and students' working environment quality greatly; 2) owing to the electronic wiping of employing, thus time saving and energy saving, alleviated labour intensity, and wiping speed is fast, quality is high.

Elaborate below in conjunction with accompanying drawing.

Fig. 1: the utility model section of structure

The right view of Fig. 2: Fig. 1

The left view of Fig. 3: Fig. 1

Fig. 4: the wheel disc figure of blackboard eraser wheel

Fig. 5: the hairbrush figure of blackboard eraser wheel

The left view of Fig. 6: Fig. 5

Fig. 7: the spring steel wire figure of blackboard eraser wheel

Referring to Fig. 1, casing 2 can be made spherical shape, front and back are removed spherical crown and are partly formed round mouth, deutostoma is assembled into one with the bonnet 3 that has steam vent, the prosopyle edge has at least three boss or the edge has some semicircle gap, so that can air inlet from gap or slit when casing and blackboard are close to when wiping.In the middle of the casing 2 dividing plate is arranged, dividing plate is divided into former and later two air chambers with casing, and blackboard eraser wheel 1 is equipped with in the front, and motor 4, fan 5 are equipped with in the back.The casing bottom has air inlet (in the dividing plate front) and gas outlet (in the dividing plate back), and filter screen 6 is installed on the gas outlet.Motor 4 be fixed on dividing plate and with the motor frame of dividing plate one on, the motor shaft front end passes dividing plate (being sealed and matched) back and is assembled together with blackboard eraser wheel 1, fan 5 is installed in the rear end of motor shaft.The spherical shell part of casing 2 and internal partition and motor frame can adopt Shooting Technique to pour into an integral plastics structure, also can make the back assembling respectively, but necessary good seal between dividing plate and the spherical shell part, with the air tight pick-up performance that influences.Dust-collecting box 7 is connected with casing 2 bottoms, and dust-collecting box 7 is the double as lever simultaneously.

Referring to Fig. 2, power switch 8 is installed in the medial surface of casing, when promptly holding with the right hand thumb over against the position, power supply lead wire is drawn from the lateral surface of casing.

Referring to Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, blackboard eraser wheel 1 is made up of circular wheel disc, three hairbrush and three spring steel wires.Have a cylindrical void every 120 ° on the wheel disc, the hole of hairbrush promptly is installed, be separated by one section with this hole in addition and respectively drive a hole (, being blind hole), i.e. spring steel wire locating hole at the wheel disc back side with spring steel wire equal in length distance.Hairbrush can be that "T"-shaped steel disc pressing is an one by the block rubber of being with palm fiber and cross section, and the eyelet of a slotting steel wire is arranged in the middle of the steel disc.Hairbrush is contained in the cylindrical void on the wheel disc, and at the wheel disc back side, one of spring steel wire is inserted in the eyelet in the middle of the hairbrush steel disc, and the hook of other end is stuck in the locating hole on the wheel disc.This structure can make hairbrush can keep well contacting with blackboard surface under the effect of spring steel wire elastic force after the wearing and tearing.Certainly, the blackboard eraser wheel also can adopt direct structure at the common blackboard eraser of planting palm fiber on the wheel disc.

Method of operating: state when state shown in Figure 1 is work, the right hand hold handle (dust-collecting box), and thumb is pushed power switch open, the rotation of driven by motor blackboard eraser wheel, and hairbrush is with the chalk dust brush down.Because the fan exhaust effect forms and enter air inlet between blackboard and blackboard eraser, then the air-flow through being discharged by the exhaust outlet on the bonnet again from the gas outlet behind the filter screen.This air-flow carries chalk dust and is collected in the dust-collecting box under filtering when filter screen, pours out after collection is full to get final product.

Claims

1, a kind of dust absorption blackboard eraser is characterized in that: motor (4) is installed in the middle of the casing (2), blackboard eraser wheel (1) and fan (5) are housed respectively on the front and back end of motor (4) axle; The bonnet (3) that has steam vent is assembled into one with casing (2); On casing (2), be positioned at blackboard eraser wheel (1) lower position and have an air inlet, be positioned at fan (5) lower position and have a gas outlet, filter screen (6) is housed on the gas outlet; Casing (2) bottom is connected with dust-collecting box (7), and casing (2) side is equipped with power switch (8) and is had power line to draw.

2, dust absorption blackboard eraser according to claim 1 is characterized in that: blackboard eraser wheel (1) is made up of wheel disc, hairbrush and spring steel wire; The hairbrush activity is contained in the hairbrush hole on the wheel disc, and one at the wheel disc back side of spring steel wire is connected with hairbrush, and the other end is stuck on the wheel disc in the locating hole.