CN2046448U

CN2046448U - Dust aspirating rubber for blackboard

Info

Publication number: CN2046448U
Application number: CN 89202775
Authority: CN
Inventors: 周余良; 黄淑明
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-03-11
Filing date: 1989-03-11
Publication date: 1989-10-25

Abstract

The purpose of the utility model is to provide a dust aspirating rubber for a blackboard, which can effectively control the falling of chalk dust. Teachers' health and environment sanitation are assured, and the time spent on erasing the blackboard is saved by two times. The device of the dust aspirating rubber for blackboard is provided with a control mechanism forming the negative pressure difference. The base arranged on the main body is stuck a projected circular hair felt rubber. The utility model is characterized in that the side of the projected circular hair felt rubber is provided with a dust aspirating opening and is communicated with the negative pressure difference. The device is primarily used in the scientific research or the teaching to lighten the burden of the teacher and improve the operation quality. The device can use direct current or alternating current power supplies, and therefore, the utility model can be suitable for cities and countries.

Description

Dust aspirating rubber for blackboard

The utility model relates to a kind of exhaustion plate face ash dust throughout the year, chalk dust device on the blackboard that particularly exhausts.

In research and teaching, the method that generally erases the board is to use felt brush or rag.Directly catch felt brush or rag with hand, firmly moving by on blackboard surface, wiping back and forth, fall till blackboard until most chalk dusts, but this course of work, often some chalk dust is bonded at brushing with felt on hand of operator, when adhering to a certain degree, can only use the mode of patting, dust is come off, and another part dust is scattered in blackboard bottom and ground, so usually influence teaching efficiency, particularly influence long-term work teacher's in this environment healthy and environmental sanitation.

Be to use the dedusting chalk for addressing this problem common way, slow down the speed of erasing the board, the prolongation time of erasing the board is controlled chalk dust and freely wafts down, wastes time and energy but can not solve, and influences healthy and sanitary problem

The purpose of this utility model provides a kind of electronic blackboard absorbent brush.It can effectively be controlled chalk dust and fall.

The purpose of this utility model is to realize like this.Utilize No. 2 batteries of two joints and motor to connect, the driven by motor impeller rotates at a high speed.At this moment suck air and dust-storage chamber by suction port, exhausting window forms Negative Pressure Difference.Under the effect of this pressure reduction.Just, the moment leaving felt brush edge, suck by suction port by Negative Pressure Difference immediately by the chalk dust under the brush.Thereby guarantee that chalk dust is drawn onto dust-storage chamber.

The utility model is the blackboard absorbent brush device of an independent operation, only need on the base plate of this device, to open suction port and dust-storage chamber, exhausting window is connected Negative Pressure Difference, so structure tube is single, because lying in to stop, the starting point do not produce chalk dust simultaneously, so it only needs the impeller rotation to form Negative Pressure Difference, just can realize controlling and wiping the synchronous requirement of grey dust suction, and its mode of operation is not had special requirement.Therefore, this blackboard absorbent brush and the traditional method of erasing the board are compared, and can save 2 times erase the board the time, and can have extremely that the control chalk dust is scattered.

The utility model device removes battery.Outside motor, lead and the felt, main material all adopts engineering plastics.This device overall weight has only 0.2 kilogram, so it is low to have a cost.In light weight, be convenient to mention at any time the characteristics of use.

Concrete structure of the present utility model is provided by following embodiment and accompanying drawing thereof.

Fig. 1 is the profile according to the blackboard absorbent brush device that the utility model proposes.

Fig. 2 is the A-A profile according to the utility model Fig. 1.Main expression valve (9) and cannelure dust-storage chamber (10).The position of exhausting window (3).

Fig. 3 is that B according to the utility model Fig. 1 is to view.Suction port (8) on the main expression base plate (4) is by constituting with three looping pits on the circumference.

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

This device main body (1) is made of levels, the outside, upper strata is designed to waist shape (not drawing among the figure) and is convenient to hold, top of the upper layer has cover plate (11), the lower floor outside is designed to circle (seeing Fig. 2), battery (12) is equipped with in inside, upper strata, insert micro machine (13) by lead and switch (not drawing among the figure), impeller (5) is equipped with in micro machine (a 13) axle lower end, the socket aperture (not drawing among the figure) by the AC power transformation not also on main body (1) upper strata.Be provided with cannelure dust-storage chamber (10) and valve (9) in main body (1) lower floor, screen pack (2) and exhausting window (3) are located on the cylindrical of main body (1) lower floor.In main body (1) bottom base plate (4) is housed, on base plate (4), be stained with felt brush (6), on the base plate (4) on circular felt brush (6) next door of protruding, suction port (8) is arranged, and suction port (8) is by constituting (see figure 3) with three identical looping pits on the circumference.

During operation.Grasp waist shape position, main body (1) upper strata, and pull switch.Power connection, motor (13) starts, impeller (5) is rotation at a high speed, form Negative Pressure Difference at once, the chalk dust (7) that is fallen by felt brush (6) brush sucks suction port (8), fall after screen pack (2) is obstructed through valve (9) and cannelure dust-storage chamber (10) dust, and air flows out by exhausting window (3), after the chalk dust in the dust-storage chamber completely arrives to a certain degree, just can open exhausting window (3) and remove.

Claims

1. blackboard absorbent brush device, this device have motor (13) and impeller (6) and valve (9).Cannelure dust-storage chamber (10).Screen pack (2), exhausting window (3) are connected and are formed the Negative Pressure Difference controlling organization.At the circular felt brush (6) that main body (1) lower floor is equipped with base plate (4) and protrudes, it is characterized in that protruding circular felt brush has suction port (8) on every side, and suction port (8) is connected with Negative Pressure Difference.

2. device according to claim 1 is characterized in that suction port (8) directly communicates with Negative Pressure Difference.

3. according to right 1,2 described devices, it is characterized in that suction port (8) constitutes with three identical looping pits on the circumference by protruding circular felt brush.