CN2095783U

CN2095783U - Blackoard eraser

Info

Publication number: CN2095783U
Application number: CN 91219543
Authority: CN
Inventors: 杜丽
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-08-01
Filing date: 1991-08-01
Publication date: 1992-02-12

Abstract

The utility model discloses a blackboard eraser in a box shape, comprising a mini DC motor in a box and screw type vanes which are provided coaxially with the motor. The power supply is a dry battery. Fascicular hair brushes are orderly arranged on intervals of an air suction opening. The air suction opening is communicated with a wind source. A dust collector in the box is provided with a wedge shaped air duct, and a side wall is provided with a dust discharging hole. A lower cover is embedded and connected with the box body by a guide groove. Two circuits are arranged in the box body, and a two-way switch can optionally select one circuit to work. The forward running is for dust suction, and the reversal running is for drying. The utility model is particularly suitable for blackboards made of frosted glass. The moisture on the blackboards can be dissipated in spring and summer.

Description

Blackoard eraser

The utility model is a kind of blackboard eraser.

The frosted glass blackboard that present all kinds of school generally uses, the surface has trickle unevenness.It has possessed two characteristics simultaneously:

One, because of its injustice, can keep the chalk bits here, form writing;

Two, because of its injustice, the chalk bits that trickle recess is concealed on the blackboard are difficult for being wiped.The present most blackboard erasers that use.All be felt rug plane formula structure, no dust-absorbing function.During use, blackboard eraser is that face contacts with blackboard, so be difficult to the dust of concealing at the trickle recess of blackboard is thoroughly disposed.The result is that the contrast between font and the blackboard reduces.The technology that Chinese patent application CN89201610.8 is disclosed, though the tool dust-absorbing function, reasonable inadequately because of the design of air suction opening, so effect is not ideal enough, and eraser partly is still felt rug plane formula structure.At the end of spring and the beginning of summer there was dampness in the air, and south often is that ponding is dirty on the blackboard more so, and above-mentioned two kinds of blackboard erasers all do not have and drive damp function.

The utility model provides a kind of can wipe clean the frosted glass blackboard, again can dust suction, also have a blackboard eraser that drives damp function.When using in the family, can make the absorbent brush of clothing, sofa class furniture, and the air blast of domestic briquet stove.

The utility model is achieved in that in boxlike blackboard eraser inside loads onto power supply (dry cell), DC micromotor, miniature spiral fan blade, disposal box, and electric energy is converted into wind energy, when erasing the board the dust under wiping is absorbed.Make it to avoid dispersing.Utilize two-way circuit and two-way switch, make the fan blade counter-rotating when needed, realize the air blast function, thereby reach the purpose of driving tide.

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

Description of drawings:

The vertical and horizontal profile of Fig. 1 blackboard eraser.

Fig. 2 scrubbing brush figure.

The three-dimensional generalized section of Fig. 3 disposal box.

Fig. 4 circuit diagram.

The utility model is box structure, is made of loam cake 1, box body 2, lower cover 3 three parts, as shown in Figure 1.The structure of loam cake 1: the top is provided with two-way switch 4.The top right-hand member has a tegillum 5, and tegillum 5 usefulness guide grooves connect with loam cake 1 in the intercalation mode, and the effect of tegillum 5 is to adorn, change power supply (dry cell).A power cathode contact point 6 is fixed in right-hand member wall inboard, and loam cake 1 and box body 2 usefulness screw attachment are together.

Box body 2 top left ends are fixed a DC micromotor 7, and the axle of motor 7 stretches out from the bottom.Be fixed with miniature spiral fan blade 8 on the axle, draw positive and negative two terminals on the motor 7.Upper right end has two △ shape muscle, is used for locating to power supply.Fix a positive source contact point 9 between motor 7 and the △ shape muscle, the both positive and negative polarity contact point 9,6 and the two-way switch 4 of the both positive and negative polarity of wire coupling motor 7, power supply form two-way circuit.Concrete bind mode is expressed by Fig. 4.

The lower space of box body 2 is divided into two zones by an inclined-plane, as shown in Figure 1.Zone, the right is an accumulation area, and accumulation area is open, interior dress disposal box 10.Outer shape, the size of disposal box 10 all match with accumulation area, can extract out.There is a ventilating duct its left end inside, and the air intake vent of ventilating duct is identical with the width of disposal box 10.With the increase of length, the width of ventilating duct is constant, and is highly gradually little, wedgewise.The effect of wedge shape ventilating duct is a wind-force intensity of strengthening the dirt wind be inhaled into.The right-hand member of disposal box 10 is fine mesh fabric, plays filter dirt.A dust-exhausting port is opened on the side in right-hand member one right angle, and as shown in Figure 3, dust-exhausting port is opened on right-angled side faces.

The structure of lower cover 3: this is a square part, and as shown in Figure 1, its a right angle face is a scrubbing brush, and another right angle face is the cover plate of accumulation area.As shown in Figure 2, the air suction opening 11 that distributing equably on the brush board face, the optimum shape in hole is a rectangle; Pencil hairbrush 12 is evenly distributed on the interval between the Kong Yukong.Have the strip pore on the lower cover, the inboard is stained with one deck fine mesh fabric, plays the effect of filter dirt.The brush board part combines in the intercalation mode with box body 2 usefulness guide grooves.As shown in Figure 1.Scrubbing brush is a quick-wear part, and so design is convenient to change.

Two plug-in strips of two-way switch 4 shown in Figure 4 move simultaneously, in the time of need erasing the board, disposal box 10 are put into accumulation area, lower cover 3 is inserted box body 2, install power supply, two-way switch 4 is placed solid line position shown in Figure 4, motor 7, fan blade 8 are just changeing at this moment, can dust suction.Using the best mode of blackboard eraser is with left end down.Right-hand member so not only can utilize wind-force up, and can utilize gravity, absorbs dust to greatest extent, reaches best pick-up performance.When blackboard eraser moved back and forth on the frosted glass blackboard, pencil hairbrush 12 and blackboard were to contact.So the dust of concealing at the trickle recess of frosted glass blackboard can be disposed.At this moment, air suction opening 11 on the brush board 3, disposal box 10 in fan blade 8, the accumulation area, the strip pore on the accumulation area cover plate etc. form wind path, the wind of band dust is inhaled into by the suction hole 11 on the brush board 3, enter the ventilating duct of disposal box 10 through fan blade 8, because of the air channel is a wedge shape, thus dust wind when going out ventilating duct, wind-force is strengthened; In a single day dust wind gone out the air channel, and pressure weakens, just four sides diffusion.When dust moves upward.Because the obstruct of disposal box 10 right-hand member fine mesh fabric, most dust can not fly out outside the disposal box 10; When dust moved downward under the gravity effect, the wind-force because of wedge shape ventilating duct air outlet place was stronger again, so dust can not fall back on the blade 8 through ventilating duct; Dust can only drop on the bottom (being left end) of disposal box 10.Twice filtration through the fine mesh fabric on disposal box 10 and the accumulation area cover plate stayed in disposal box 10 and the accumulation area dust, and clean quiet gas is then by outside the strip pore effusion box body on the accumulation area cover plate, as shown in Figure 1.When removing dust, lower cover 3 is extracted out.Take out disposal box 10, dust is poured out from dust-exhausting port got final product.

Need drive the time of tide, lower cover 3, disposal box 10 are extracted out, two-way switch 4 is placed dotted line position shown in Fig. 4, make motor 7, fan blade 8 counter-rotatings.Gas is inhaled into from accumulation area, is discharged from through fan blade 8.At this moment, fan blade 8 plays air blast, can the blackboard of humidity be dried up, thereby reaches the purpose of driving tide.

The utility model has the advantages that: adopt micro screw-type fan blade 8 and wedge shape ventilating duct to strengthen suction dirt wind-force intensity. Disposal box 10 right-hand members are fine-structure mesh shape fabrics, and inboard, lower cover 3 right side also is stained with the thin shape fabric of one deck, can filter dirt. Pencil hairbrush 12 contacts with blackboard point, and trickle recessed dust is removed. Lower cover 3 is square parts. Be combined with box body 2 guide groove intercalation modes, consumable accessory is convenient to change. Loam cake 1 has two-way switch 4 forward dust suctions, oppositely can drive tide.

Claims

A kind of blackboard eraser, be boxlike, DC micromotor 7 is arranged in the box, the fan blade 8 coaxial with motor, power supply (dry cell), pencil hairbrush 12 is characterized in that, the fan blade 8 coaxial with motor 7 is screw type, opening the air suction opening of arranging in order 11 on the brush board face of lower cover 3, the air suction opening optimum shape is a rectangle, and each air suction opening 11 directly communicates with wind regime, and pencil hairbrush 12 is arranged on the interval between the air suction opening 11, the brush board of lower cover 3 embeds box body 2 with guide groove and connects mutually, the wedge shape ventilating duct is arranged in the disposal box 10, connect power supply, motor 7 be two circuit, by the optional uses of two-way switch 4.