CN2570052Y

CN2570052Y - Blackboard eraser

Info

Publication number: CN2570052Y
Application number: CN 02275277
Authority: CN
Inventors: 王富
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-09-16
Filing date: 2002-09-16
Publication date: 2003-09-03
Anticipated expiration: 2012-09-16

Abstract

The utility model discloses a blackboard eraser which comprises an open box body 1 and a supporting frame 2, wherein, two guide grooves 11 are separately arranged in vertical directions on both inner lateral faces of the box body 1, and the lateral face of the supporting frame 2 relative to positions of the four guide grooves 11 is provided with four guide tracks 21 which can slide up and down in the guide grooves 11. Four brackets 22 in the same direction are arranged on the supporting frame 2, and an eraser body 5 is stuck and fixed on each bracket 22; the eraser body 5 is a sponge, wherein, the four eraser bodies 5 are higher than the open surface of the box body 1, and two sponges in the middle are higher than sponges on both sides by two to three mm. Four regulating screws 24 which are arranged on the supporting frame 2 are screwed out of cover plates to regulate the height of the sponges stuck on the supporting frame 2, and the bottom of the box body 1 is provided with a dust collecting chamber 4 of which the open side and inner surface positions on both sides of the box body are provided with declivitous inserted-grooves 14; a dust collecting plate 3 is inserted in the inserted-groove 14 and can slide in the inserted-groove 14, and the inner end of the dust collecting plate 3 is connected with two springs 6 of which the other ends are connected with the inner side of the cover plate of the box body 1. The bottom of the dust collecting chamber 4 is provided with a dust discharging hole plug 13, when the blackboard eraser is used, pressure of human hands towards a blackboard enables the dust collecting plate 3 to be tightly contacted with the blackboard and to collect all dust in the dust collecting chamber 4; the dust collecting plate 3 optimally forms an included angle of 16 DEG with a horizontal direction when the utility model is used.

Description

Blackboard eraser

Technical field

The blackboard eraser that uses when the utility model relates to a kind of the teaching.

Background technology

At present, the blackboard eraser that each large, medium and small is used in teaching, its structure generally is to form with felt, staple fibre and veneering, the forming of minority with corduroy and plank and filler nail system, and the blackboard eraser of said structure is not in use because of collecting the dust under the wiping, cause dust in the classroom, to fly upward, particularly dust from flying especially severe around the teacher after teacher and the student who listens to the teacher absorb, has had a strong impact on the healthy of teacher and student, in the course of time, easily suffer from anthraco-silicosis.

The utility model content

The purpose of this utility model is to solve the dust from flying problem that existing blackboard eraser produces when wiping word, and provide a kind of in wiping the word process blackboard eraser of no dust from flying, assurance teacher and student's is healthy.

The utility model includes a uncovered casing and a support, two medial surfaces of this casing are upright to being respectively equipped with two guide grooves, the side of support is provided with four guide rails with respect to four guide groove positions and can slides up and down in guide groove, this support is provided with four carriages in the same way, cementation has rub body on each carriage, and this rub body is a sponge, wherein, four rub bodies exceed the open face of casing, and middle two sponges exceed both sides sponge 2～3mm; Support is provided with four open-works, and each open-work turn connects one and adjusts screw, and the cover plate of casing is provided with four screws, and adjust screw for four and screw out four screws on the cover plate, and bonding sponge height on the adjustable support.

In addition, the bottom of casing is provided with dust collection chamber, the inner face position, both sides of the opening edge of this collecting chamber and casing is provided with a downward-sloping slot, one dust collection plate inserts in the slot and can slide in slot, the inner of dust collection plate is connected with two springs, and the end in addition of this two spring is connected with the cover plate of casing is inboard, when this blackboard eraser uses, the pressure of pressing to blackboard by staff closely contacts the dust collection plate with blackboard, it is indoor that dust all is collected in dust collection; Level when dust collection plate and use is 16 ° to the angle best angle.

Moreover, the utility model can be provided with a box body in the side of the coastal continuous direction of casing, be provided with battery in the box body, micromachine, mini fan, be provided with a uncovered compartment between box body and the casing, this uncovered towards casing the cover plate direction and and cover plate between certain distance arranged and be air flow channel, being provided with a pair of hang plate in the compartment is connected with cover plate, this pair hang plate bottom longitudinally joins with the box side bottom, the upper end is outward-dipping, the horizontal end of this inclined in two-way plate is to the left side of compartment, and and the sidewall of compartment between leave the gap and be air flow channel, be provided with negative pressure chamber in the box body, be provided with blow vent between this negative pressure chamber and the compartment, communicate between negative pressure chamber and the mini fan and be provided with filter screen, the box body outside of mini fan position is provided with air outlet.

The utility model in use, since middle two rub bodies with respect to the rub body on both sides than higher, play the effect of wiping word, in the process of wiping word, the rub body on both sides closely contacts with blackboard surface, dust under rub body is wiped in the middle of making is under the sealing of gravity and both sides rub body, drop on the dust collection plate of below, because the dust collection plate tilts to dust collection chamber, so that the dust on the dust collection plate has just fallen into dust collection is indoor, in addition, after the rub body wearing and tearing, can regulate the adjustment screw, rub body is outwards ejected, continue to use the service life of having improved blackboard eraser greatly.

Moreover, because the utility model is provided with mini fan, make dust under wiping under the effect of negative pressure, collect motion to negative pressure chamber, under the effect of two Dou plates that incline, it is indoor that most of quilt retaining is gone into dust collection, increased the dust collection effect, prevented the health infringement of dust from flying teacher and student.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment.

Fig. 2 is that A-A among Fig. 1 is to cutaway view.

Fig. 3 is that B-B among Fig. 1 is to cutaway view.

Fig. 4 is that C-C among Fig. 1 is to cutaway view.

The specific embodiment

See also Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, the utility model includes a uncovered casing 1 and a support 2, two medial surfaces of this casing 1 are upright to being respectively equipped with two guide grooves 11, the side of support 2 is provided with four guide rails 21 with respect to four guide groove 11 positions and can slides up and down in guide groove 11, this support 2 is provided with four carriages 22 in the same way, cementation has rub body 5 on each carriage 22, this rub body 5 is a sponge, wherein, four rub bodies 5 exceed the open face of casing 1, and middle two sponges exceed both sides sponge 2～3mm; Support 2 is provided with 23, four open-work 23 turns of four open-works and connects one and adjust screw 24, and the lid of casing 1 is provided with 12, four of four screws and adjusts four screws 12 that screw 24 screws out on the cover plates, and bonding sponge height on the adjustable support 2.

In addition, the bottom of casing 1 is provided with dust collection chamber 4, the inner face position, both sides of the opening edge of this dust collection chamber 4 and casing is provided with a downward-sloping slot 14, one dust collection plate 3 inserts in the slot 14 and can slide in slot 14, the inner of dust collection plate 3 is connected with two springs 6, the end in addition of this two spring 6 is connected with the cover plate of casing 1 is inboard, the bottom of dust collection chamber 4 is provided with a dust discharging hole plug 13, when blackboard eraser uses, the pressure of pressing to blackboard by staff closely contacts dust collection plate 3 with blackboard, dust all is collected in the dust collection chamber 4; Level when dust collection plate 3 and use is 16 ° to angle the best.

Moreover, the utility model can be provided with a box body 10 in the side of casing 1 coastal continuous direction, be provided with battery 91 in the box body 10, micromachine 9, mini fan 97, be provided with a uncovered compartment 7 between box body 10 and the casing 1, this uncovered towards casing 1 the cover plate direction and and cover plate between certain distance arranged and be air flow channel, as shown in Figure 4, being provided with a pair of hang plate 8 in the compartment 7 is connected with cover plate, this pair hang plate 8 bottom longitudinally joins with casing 1 side plate bottom, as shown in Figure 1, the upper end is outward-dipping, the horizontal end of this inclined in two-way plate 8 is to the left side of compartment 7, as shown in Figure 4, and and the sidewall of compartment 7 between leave the gap and be air flow channel, the angle of inclination of the both direction of inclined in two-way plate 8 is 2 °～3 °, be provided with negative pressure chamber 95 in the box body 10, be provided with blow vent 92 between this negative pressure chamber 95 and the compartment 7, communicate between negative pressure chamber 96 and the mini fan 97 and be provided with filter screen 93, box body 10 outsides of mini fan 9 positions are provided with air outlet 96, and box body 10 is provided with switch 94.

Claims

1, a kind of blackboard eraser, it includes casing and rub body, it is characterized in that: also include a support, wherein, casing is uncovered casing, and two medial surfaces of this casing are upright to being provided with guide groove, the side of support is provided with guide rail with respect to the guide groove position, and this guide rail cunning is put in guide groove; Support is provided with four carriages of arranging in the same way, cementation has rub body on this carriage, and four rub bodies exceed the open face of casing, and the height of middle two rub bodies is higher than the rub body of both sides, turn is provided with the adjustment screw on the support, and this adjustment screw threads goes out the screw of box cover; The bottom of casing is provided with dust collection chamber, the inner face position, both sides of the opening edge of this dust collection chamber and casing is provided with downward-sloping slot, be plugged with the dust collection plate in this slot, the inner of dust collection plate is connected with two springs, the end in addition of this two spring is connected with the cover plate of casing is inboard, and the bottom of dust collection chamber is provided with a dust discharging hole plug.

2, according to the described a kind of blackboard eraser of claim 1, it is characterized in that: two rub bodies in described centre exceed both sides rub body 2～3mm.

3, according to claim 1 or 2 described a kind of blackboard erasers, it is characterized in that: described rub body is a sponge.

4, according to the described a kind of blackboard eraser of claim 1, it is characterized in that: dust collection plate in slot that inner face position, described casing both sides is downward-sloping and the slot and level to angle be 16 °.

5, according to the described a kind of blackboard eraser of claim 1, it is characterized in that: the side of described casing is provided with a box body, be provided with battery, micromachine, mini fan in the box body, be provided with a uncovered compartment between box body and the casing, this uncovered towards casing the cover plate direction and and cover plate between certain distance arranged and be air flow channel, be provided with a pair of hang plate in the compartment to be connected with cover plate; This pair hang plate bottom longitudinally joins with the box side bottom, and the upper end is outward-dipping; The horizontal end of this inclined in two-way plate is to the left side of compartment, and and the sidewall of compartment between leave the gap and be air flow channel, be provided with negative pressure chamber in the box body, be provided with blow vent between this negative pressure chamber and the compartment, communicate between negative pressure chamber and the mini fan and be provided with filter screen, the box body outside of mini fan position is provided with air outlet.

6, according to the described a kind of blackboard eraser of claim 5, it is characterized in that: the angle of inclination of the both direction of described inclined in two-way plate is 2 °～3 °.