CN2475575Y

CN2475575Y - Dustless blackboard brush

Info

Publication number: CN2475575Y
Application number: CN 01235131
Authority: CN
Inventors: 李伟奇
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-05-19
Filing date: 2001-05-19
Publication date: 2002-02-06
Anticipated expiration: 2011-05-19

Abstract

A dust-free blackboard brush is composed of casing, ventilating cavity with air inlets at both sides, guide plate with two suspended sides and two fixed ends, elastic supporting plate with one end fixed to casing and the other end suspended, press keys fixed to upper part of said elastic supporting plate and brush panel with brush hair surface fixed to lower part of said elastic supporting plate, press keys with clamping slot on key post, elastic control plate with one end welded to or riveted to guide plate and the other end suspended, clamping post and reset key fixed to upper part of said elastic control plate, and soft sealing sleeve at lower end of casing. The utility model discloses simple structure, cost are low, convenient to use, dust removal effect reach 92%, and no energy consumption does not have transmission, and is light durable.

Description

Dustless eraser

The utility model relates to a kind of teaching appliance that is used to erase the board.

When teacher erases the board on class, no matter use common chalk or dust-free chalk, all give and cause very big dust pollution in the classroom, particularly when light is stronger, naked eyes see that dust flies upward everywhere in air, more give a kind of dysphoric sensation of people, have a strong impact on the healthy of Faculty and Students.In recent years, a kind of electric dust absorption brush board appears in the Hunan, can reduce the dust from flying phenomenon when erasing the board, and its weak point is that cost height, complex structure, volume are big, fragile, and wants consumed power.

The purpose of this utility model provides a kind of dustless eraser, accomplish simple in structure, cost is low, easy to use, good dedusting effect, no energy consumption, no transmission device, light durable.

The purpose of this utility model is achieved in that on blackboard brush top vented cavity and deflector is set, and forms air whirl, and dust is sucked in the blackboard brush, reaches dust suction and cleans effect with water.At the blackboard brush middle part button and button resetting means are set, the brush finish plate time spent is stretched out, not time spent indentation, the vibration that utilizes the indentation process to produce is shaken off in dust-collecting box the dust of bristle face.Be provided with software sealing cover in the blackboard brush bottom, prevent to clean with water that dust leaks in the process.

Compared with prior art, characteristics of the present utility model are as follows:

1, good dedusting effect

Owing to adopt air to circulate automatically, produce the dust suction of air whirl principle, add can upper and lower mobile brush finish plate vibration take off the dustproof effect of leaking that dirt and software sealing are overlapped, dust removal efficiency can reach about 92%.

2, simple in structure, easily make, so production cost is low.

3, not electricity consumption is not consumed energy, and is easy to use.

4, because whole device does not have transmission device, volume is only slightly thicker than the normal blackboard brush, therefore light durable.

Describe concrete structure of the present utility model and operation principle in detail below in conjunction with drawings and Examples.

Fig. 1 is the dustless eraser front view

Fig. 2 is the dustless eraser vertical view

Fig. 3 is that the A of Fig. 1 is to cutaway view

Fig. 4 is that the B of Fig. 2 is to cutaway view

As shown in the figure, but the vented cavity 2 of both sides air intake is arranged at housing 1 top, on housing 1 watchcase key hole 3 is arranged, and deflector 4 dual-sides are unsettled.Two ends are separately fixed on the housing 1, elastic bearing sheet 5 one ends are fixed on the housing 1, the other end is unsettled, the brush finish plate 7 that its upper fixed has button 6, below fixedly to have bristle face has draw-in groove 8 on the key post of button 6, and elasticity control strip 9 one ends weld or are riveted on the deflector 4, the other end is unsettled, be mounted with card post 10 and reset key 11 on it, software sealing cover 12 is enclosed within housing 1 lower end, constitutes Storage Box 13 with housing 1.

Operation principle and using method are as follows: when the hand-held housing 1 of people, and pushed button 6 o'clock, card post 10 snaps under the elastic force effect of elasticity control strip 9 in the draw-in groove 8 on the button 6 automatically, makes brush finish plate 7 move down a segment distance.The people holds housing back and forth during erasing blackboard, air can be from left and right both direction turnover vented cavity 2, wherein portion of air passes in and out housing 1 middle parts (shown in the arrow among Fig. 3) along deflector 4, and forms air whirl, and this eddy current sucks dust also falls in the Storage Box 13 dust.Meanwhile, software sealing cover four limits are close on the blackboard slides, and prevents to be leaked by the dust under the bristle face brush.Clear wipe finish after, press reset key 11, make card post 10 disengaging draw-in grooves 8, then brush finish plate 7 will rise under the effect of elastic bearing sheet 5 and be returned to original position.The vibration that produces in its Recovery Process can make the dust of bristle face shake off in Storage Box 13, promptly plays vibration and takes off the dirt effect.When ash is full in the Storage Box 13, pliable-closure cover 12 is taken off, ash can be outwelled the back and continue to use.

In the present embodiment, the bristle face on the brush board 7 is divided into two, and the space more than 5 millimeters is arranged between two.Its effect is to prevent that the dust large tracts of land is bonded on the bristle face, influences dust removing effects.

At ordinary times time spent not, blackboard brush can be adsorbed on the plate object and places.

Claims

1, a kind of dustless eraser, it is characterized in that housing (1) but the vented cavity (2) of both sides air intake is arranged at top, on housing (1) watchcase key hole (3) is arranged, deflector (4) dual-side is unsettled, two ends are separately fixed on the housing (1), elastic bearing sheet (5) one ends are fixed on the housing (1), the other end is unsettled, its upper fixed has button (6), the brush finish plate (7) that the below fixedly has bristle face, draw-in groove (8) is arranged on the key post of button (6), elasticity control strip (9) one ends weld or are riveted on the deflector (4), the other end is unsettled, be mounted with card post (10) and reset key (11), software sealing cover (12) is enclosed within housing (1) lower end, constitutes Storage Box (13) with housing (1).

2, dustless eraser according to claim 1 is characterized in that the last bristle face of brush finish plate (7) is divided into two, has the space more than 5 millimeters between two.