CN2146379Y

CN2146379Y - Dust collector for erasers

Info

Publication number: CN2146379Y
Application number: CN 92238239
Authority: CN
Inventors: 周惠昌
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-10-08
Filing date: 1992-10-08
Publication date: 1993-11-17
Anticipated expiration: 2002-10-08

Abstract

The utility model relates to a blackboard eraser with a dust collecting function for teaching. The blackboard eraser of a dust collector for erasers is provided with two soft erasing surfaces and a plurality of air suction openings are arranged between the erasing surfaces and among peripheric soft bars. The inner part of a dust collector is provided with a direct current electric motor, blades, a filter screen with a meniscoid surface and a filter screen baffle board, wherein, the periphery of the electric motor are provided with acoustic materials, and a power supply is dry batteries and alternating current which is conversed by an adjustable AC and DC changeover device. A two-way switch discretionarily chooses a circuit from two circuits to use, forward direction is dust collecting, reverse direction is air blasting, dampness driving and collected dust eliminating in the filter screen, and a dust eraser is arranged instead of the blackboard eraser to be used for removing dust from furniture.

Description

Dust collector for erasers

The utility model belongs to a kind of teaching aid, is the blackboard eraser dust catcher that a kind of letter written with chalk that can wipe on the blackboard can absorb dust again.

Present all kinds of school still generally uses chalk to write on blackboard, and during with the blackboard eraser blackboard wiping, dust flies upward everywhere, has both polluted environment, has influenced the healthy of teachers and students again.For addressing this problem, a kind of blackboard eraser that the Chinese patent application CN91219543.6 that published in 1992 proposes a lot of dust absorption blackboard erasers appearred,, though tool dust-absorbing function, but reasonable inadequately because of the design of air suction opening, filter screen, the area of air suction opening is too big, and air velocity is too little.The design of filter screen is on exhaust outlet, and directly by fan blade, some dust can be bonded on the fan blade dust filtered like this, has increased resistance, and as when sofa class furniture uses, thick dust also can influence the life-span of fan blade.The area of screen pack is too little, and is more much smaller than the area of air suction opening, and when some dust was bonded on the filter screen, the air velocity of air suction opening can be very little, so pick-up performance is not ideal enough.

The purpose of this utility model is exactly at above-mentioned the deficiencies in the prior art, and provides a kind of when can wipe chalk writing, again can dust suction.The blackboard eraser of blackboard eraser dust catcher is extracted out, loaded onto dust and wipe, can make furniture, the dust suction of clothing class.Utilize two-way circuit and two-way switch, make the fan blade counter-rotating when needed, realize air blast, reach and drive the tide effect, also can eliminate the laying dust of filter screen.

The utility model is achieved in that on the blackboard eraser top of boxlike blackboard eraser dust catcher two longitudinally soft wiping faces, there is a circle to keep than the short 2～4mm of wiping face soft around the soft wiping face, has several air suction opening between two wiping faces and between wiping face and soft all around.Branch is separated with vacuum chamber, dust-collecting cavity, fan blade chamber, discharge chamber and battery and puts the chamber in the blackboard eraser dust catcher.Vacuum chamber is made of jointly blackboard eraser top and box body.Screen pack and screen pack baffle plate are housed in the vacuum chamber.Dust-collecting cavity is made of jointly the bottom and the box body of blackboard eraser.Discharge chamber is made of jointly motor cover and box body.Two-way switch, adjustable AC/DC changeover switch socket are housed on the motor cover, a motor is housed in the chamber, the outer ring of motor is equipped with sponge etc. and is made quieter material, the axle of motor is stretched in the fan blade chamber by the hole, fan blade is contained on the axle, the fan blade chamber has passage to communicate with discharge chamber, and discharge chamber has the plurality of rows pore to communicate with the external world.Battery is put the conductor contactor that contacts with the battery utmost point in the chamber, make corresponding electrical ties between this contactor and two-way switch, switch and the motor, constitutes two-way circuit, adjustable AC/DC changeover switch socket also with the corresponding electrical ties of two-way switch work.According to the above, technical solutions of the utility model can suck dust in the dust catcher when wiping writing, prevent that it from dropping and fly upward, utilize two-way circuit and two-way switch to make the fan blade counter-rotating realize air blast when needed, drive the function of tide and elimination filter screen laying dust, blackboard eraser is extracted out, loaded onto dust and wipe, can do the furniture dedusting.

The drawing of accompanying drawing is described as follows:

Fig. 1 is a kind of scheme longitudinal sectional view of the utility model.

Fig. 2 is the left view of Fig. 1.

Fig. 3 is a circuit diagram.

Fig. 4 is the A-A cutaway view of Fig. 2.

Fig. 5 is the vertical view of Fig. 2.

The longitudinal section that Fig. 6 wipes for dust.

Now the utility model is described in further detail in conjunction with the accompanying drawings and embodiments.

With reference to Fig. 1～Fig. 5, the utility model is a box structure.(loam cake comprises that motor cover 17 and battery cover (24) three parts constitute by blackboard eraser 2, box body 1, loam cake.Two soft wiping faces 6 are vertically arranged at the top of blackboard eraser 2, the below of wiping face 6 has one horizontal soft 5, wiping face 6 and laterally soft 5 around soft 4 on a circle arranged, keep for soft 4 than wiping face 6 and soft 5 short 2～4mm, be provided with several air suction opening 7 between the wiping face 6 and between wiping face 6 and soft 5 and soft 4 all around, laterally soft can stop the dust that vertically falls along wiping face 6, and dust is brought in the dust catcher by bigger air-flow.Branch is separated with vacuum chamber 10, dust-collecting cavity 3, fan blade chamber 11, discharge chamber 18 and battery and puts chamber 23 in boxlike blackboard eraser dust catcher.Vacuum chamber 10 is made up of the top and the box body 1 of blackboard eraser 2.In order to increase filter dirt area, in vacuum chamber 10, be provided with screen pack 8 and screen pack baffle plate 9 that rectangle adds the male and fomale(M﹠F) of half garden shape, the periphery of the periphery of screen pack 8 and screen pack baffle plate 9 fastens with glue.Dust-collecting cavity 3 is made of jointly the bottom and the box body 1 of blackboard eraser 2.Discharge chamber 18 is made of jointly motor cover 17 and box body 1.Motor cover 17 is linked together by screw 13 and box body 1, two-way switch 19 and adjustable AC/DC changeover switch socket 20 are housed on the motor cover 17, a motor 16 is housed in the discharge chamber 18, the outer ring of motor 16 is equipped with sponge 15 grades and is made quieter material, the axle of motor 16 is stretched in the fan blade chamber 11 by the hole, fan blade 12 is loaded on the axle, and fan blade chamber 11 has passage 21 to communicate with discharge chamber 18, and discharge chamber 18 has plurality of rows pore 14 to communicate with the external world.Battery is put chamber 23 and is made up of jointly box body 1 and motor cover 17 and battery cover 24.Battery cover 24 usefulness guide grooves connect with box body 1 in the intercalation mode, and the effect of battery cover 24 is to adorn, change battery.Battery is put the conductor contactor 25 that contacts with the battery utmost point in the chamber 23, make corresponding electrical ties between this contactor 25 and two-way switch 19, switch 19 and the motor 16, constitute two-way circuit, adjustable AC/DC changeover switch socket 20 is also made corresponding electrical ties with two-way switch 19, and concrete bind mode as shown in Figure 3.

During use, battery 22 battery of packing into is put in the chamber 23, make motor 16 up, battery put chamber 23 below, two-way switch 19 is pulled out to just changeing, motor 16 just drives fan blade 12 and rotates, at this moment vacuum chamber 10 produces negative pressure, dust under two vertical soft wiping faces 6 of blackboard eraser 2 are wiped is by by soft 4 air all around dust being brought into vacuum chamber 10 by air suction opening 7, enter the air flow slows of vacuum chamber 10, the dust that weight is big falls under gravity in the dust-collecting cavity 3, the dust that is bonded on the screen pack 8 is also fallen in the dust-collecting cavity 3 when having a power failure, when the micronic dust that gathers when screen pack 8 is too much, can release screen pack baffle plate 9 and eliminate the laying dust of filter screen 8, perhaps eliminate laying dust with two-way switch 19 counter-rotating, when the dust accumulation of dust-collecting cavity 3 when a certain amount of, can extract blackboard eraser 2 out and dust outwelled or dust stored the usefulness of making the reprocessing chalk.Filter the clean air in back by screen pack 8 and enter fan blade chamber 11, under the promotion of fan blade 12, air passes passage 21 and enters discharge chamber 18, and then passes steam vent 14 and enter the external world.Need carry out air blast and the blackboard of humidity is driven the time of tide domestic briquet stove, blackboard eraser 2, screen pack baffle plate 9 and screen pack 8 are extracted out, two-way switch 19 is placed dotted line position shown in Figure 3, make 12 counter-rotatings of motor 16, fan blade, the path that air is walked during along dust suction is reverse and walk to reach air blast, drive damp function.When family uses the dust of removing furniture, can extract blackboard eraser 2 out, load onto dust shown in Figure 6 and wipe, when using pencil hair (3) to sweep the little furniture in horizontal plane and inclined plane, dust enters air suction opening (2), and the filter dirt of process filter screen 8 falls into dust-collecting cavity (1).When making when being used for sweeping the big furniture in vertical plane or inclined plane, dust then drops in the dust-collecting cavity 3 of Fig. 1, reaches the purpose of dedusting.

The utility model has the advantages that: blackboard eraser 2 has two vertical soft wiping faces 6, article one, horizontal soft 5, one circle soft 4 than wiping face 6 and soft 5 short 2～4mm arranged around wiping face 6 and soft 5, strengthened pick-up performance, screen pack 8 and screen pack baffle plate 9 are the male and fomale(M﹠F) structure, have increased the area of screen pack widely.Dust catcher can use the dust of blackboard eraser 2 and Fig. 6 to wipe, and blackboard eraser 2 is that plug-in type combines with box body 1, and consumable accessory is convenient to change, the two-way switch 19 forward dust suctions on the motor cover 17, but oppositely air blast, drive tide and elimination filter screen laying dust.

Claims

1, the blackboard eraser dust catcher is a boxlike, comprise blackboard eraser, box body, loam cake three parts, it is characterized in that dividing in the box and be separated with vacuum chamber, dust-collecting cavity, the fan blade chamber, discharge chamber and battery are put the chamber, vacuum chamber is by blackboard eraser, box body is formed, screen pack and screen pack baffle plate are arranged in it, discharge chamber is made of jointly motor cover and box body, two-way switch and adjustable AC/DC changeover switch socket are housed on the motor cover, a motor is housed in the chamber, the noise reduction sponge is equipped with in the outer ring of motor, the axle of motor is stretched in the fan blade chamber by the hole, fan blade is contained on the axle, the fan blade chamber has passage to communicate with discharge chamber, and discharge chamber has several steam vents to communicate with the external world, and battery is put the conductor contactor that contacts with the battery utmost point in the chamber, this contactor and two-way switch, make corresponding electrical ties between switch and the motor, constitute two-way circuit, utilize two-way circuit and two-way switch to make the fan blade counter-rotating realize air blast when needed, drive the laying dust of tide and elimination filter screen, the dust wiping is loaded onto in the blackboard eraser extraction can be done the furniture dedusting.

2, blackboard eraser dust catcher according to claim 1 is characterized in that the screen pack (8) of vacuum chamber and screen pack baffle plate (9) are the male and fomale(M﹠F) structure.

3, blackboard eraser dust catcher according to claim 1 and 2,2 soft wiping faces (6) are vertically arranged at the top that it is characterized in that blackboard eraser (2), the below of wiping face (6) has one horizontal soft (5), soft (4) of one circle than soft wiping face (6) and soft (5) short 2～4mm are arranged around soft wiping face (6) and soft (5), have several air suction opening between two soft wiping faces (6) and soft (4) all around.