CN2259297Y - Blackboard eraser with device for absorbing the chalk dust - Google Patents

Abstract

The utility model discloses a structure capable of absorbing blackboard chalk dust. A plastic piece is used as a main structure by the utility model, and the utility model is matched with a pumping component composed of a large power motor and a blade wheel in order to achieve the purposes of mass assembly and sale and convenient use and disassembly. Simple regulated power supply is used, and power is supplied by commercial power 220V in order to reduce consumption and cost. The utility model has the advantages of safety and energy saving. Products of the utility model can change the history condition of occupational diseases caused by chalk dust aspiration of educational circles.

Description

Dust-sucking eraser

The utility model relates to a kind of outer have plastic casing and felt bar, in a kind of structure that the blackboard chalk dust is directly sucked that motor and impeller and filtering material are formed is housed.

At present, educational circles still be unable to do without customary practice decades---with common blackboard eraser wiping chalk writing.The dust harzard that flies upward teachers and students' health, having only employing dust-free chalk, so-called dust-free chalk when not having other way is that dust quantity is less than other chalk, yet its damaging effect also can not be underestimated, it is made by heavy metallic oxide, and a spot of dirt just can endanger people's health.Be subjected to after the dust pollution, the teacher suffers from pneumoconiosis, and is uncomfortable in chest, breathe hard, and cough, weak, dizzy has a strong impact on teaching.For this reason, the knowledgeable people of educational circles calls thorough solution white pollution problems for many years, yet does not see actual effect so far.

The utility model purpose provide a kind of performance more superior, make well, durable, reasonable price, welcome a kind of practical product, wish that the left in history seed of trouble of educational circles-white dust pollution will be thoroughly rooted out in its appearance.

The purpose of this utility model is achieved in that the appearance of blackboard eraser routinely makees the box of a rectangle, lays a lid that is stained with felt in the front of box, processes many apertures around felt.Z font cotton screen pack is housed in box.Bonnet at box is equipped with a cylindrical cavity, and the direct current generator of a band of center fixed impeller is when going up dc source to motor is logical, motor band impeller runs up, gas is pushed out cavity in the cylinder, and when wiping letter written with chalk, white powder just enters in the box from the protecgulum aperture; Dust is filtered net and stays, and clean air enters in the atmosphere from the bonnet cylindrical cavity, has finished wiping word dust suction work simultaneously.

One of handy, durable, its reason of the present utility model be the expanded area of filter screen be the lid area 8-12 doubly, good filtration effect

Concrete structure of the present utility model is drawn by following examples and accompanying drawing thereof.

Fig. 1 and Fig. 2 are agent structure blackboard eraser fragmentary cross-sectional views, and Fig. 3 is supporting part voltage-stabilized power supply profile, and these two parts share blackboard eraser and just can work.

Describe details and working condition in detail below in conjunction with Fig. 1, Fig. 2, Fig. 3 according to the concrete structure that the utility model proposes.

The agent structure of this dust-sucking eraser is formed the wiping character segment by bonding felt (1) and the protecgulum (2) of going up W shape, filter element (3) is formed by twining cotton on screen frame Fig. 2, impeller (5) is housed on the motor (7), motor (7) is fixed on the cylinder (6) of band cavity, and cylinder (6) connects with main body (4) tight fit of box.When (7) two binding posts of motor are passed into dc source, blackboard eraser just can be wiped word, is entered in the box from lid (2) by the chalk dust under wiping, and dust is filtered device (3) and stops, clean air prolongs cylinder (6) from the rear portion of box cavity enters atmosphere, and the course of work comes to this.

When overworking dust in the filter spare (3), take away protecgulum (2) and topple over and fasten again after dust finishes, can continue to use.

The following describes Fig. 3 operating position.One has transformer (1) and rectifying and voltage-stabilizing parts (2) is housed in the plastic casing, voltage swing according to actual needs, and mobile feather key (3) can change voltage range, by plug (4) supply subject blackboard eraser motor power.

As above state, dust-sucking eraser by the combination of main body and supporting two structures just can operate as normal.

Claims (4)

1, a kind of wiping chalk dust writing, inhale the dust-sucking eraser of people's chalk dust simultaneously, form by dust-sucking eraser and matching used voltage-stabilized power supply, it is characterized in that: become the felt bar of W shape to be fixed on the protecgulum, to be connected with main casing employing interference fits; The filter element of being made up of cotton and filtration rack is placed in the main casing; Fix a motor that has impeller in the cylindrical drum of band cavity.

2, dust-sucking eraser according to claim 1 is characterized in that: the combination of each parts adopts interference fits or tight fit to connect.

3, dust-sucking eraser according to claim 1 is characterized in that: filtration members is to be wrapped in by the zigzag shape by cotton to filter on the rack.

4, dust-sucking eraser according to claim 1, it is held to levy and is: matching used voltage-stabilized power supply is by transformer, mu balanced circuit element and the combination of slip electric wire connecting junction.

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