CN104669891B - Convenient blackboard eraser - Google Patents

Abstract

The invention relates to a blackboard eraser, which aims to provide a convenient blackboard eraser. According to the convenient blackboard eraser, chalk dust can be favorably collected, dust flyoff can be reduced, and harm and harmful effects on human body health can be lowered. The convenient blackboard eraser comprises a blackboard eraser body and a holding part, wherein the holding part is positioned on the back of the blackboard eraser body; N parallel eraser bodies are arranged in the blackboard eraser body; two eraser bodies on the outmost side and the side wall of the blackboard eraser body respectively form a certain distance to form two side dust cavities; a certain space is formed between the two adjacent eraser bodies to form a middle dust cavity; the front sides of the two side walls of the blackboard eraser body are provided with soft bristle; the lower part of the blackboard eraser body is provided with a detachable box body; a dust chamber is formed between the bottom of the box body and the bottom of each eraser body, wherein N is greater than or equal to 2.

Description

A kind of intimate blackboard eraser

Technical field

The present invention relates to a kind of teaching aid, in particular, it is to be related to a kind of blackboard eraser.

Background technology

Blackboard eraser, as a kind of traditional teaching aid, so far still has very wide applicability.But for a long time, Because the dust pollution that chalk dust causes annoyings all users always.Chalk dust all can cause not to the body of Faculty and Students Good impact, therefore, reduce chalk dust to disperse in classroom is the main purpose of blackboard eraser as far as possible.

Content of the invention

It is an object of the invention to provide a kind of intimate blackboard eraser, chalk dust can be collected well, reduce dust and disperse, fall The low injury to health and harmful effect.

For achieving the above object, the present invention is achieved through the following technical solutions:

A kind of intimate blackboard eraser, including blackboard eraser main body and grip part, described grip part located at the back of described blackboard eraser main body, It is provided with the rub body of n parallel arrangement, positioned at the outermost two rub bodies side with described blackboard eraser main body respectively in described blackboard eraser main body Wall keeps at a certain distance away and forms both sides ash chamber, ash chamber, described blackboard eraser master in the middle of the formation that keeps at a certain distance away between two adjacent rub bodies The front of the two side of body is provided with soft bristle, and the bottom of described wiping board main body is provided with a removable cassette, the bottom of box body with Form grey room, n >=2 between described rub body bottom.

When erasing the board, be first soft bristle close to letter written with chalk, chalk dust be swept up side ash chamber in, followed by rub body contact powder Word, the chalk dust under sweeping be swept up thereafter in the middle of in ash chamber, dry still without chalk trace when first rub body streaks When only, second rub body continues inswept letter written with chalk, and the chalk dust under sweeping falls in middle ash chamber thereafter, so up to last Individual rub body nuzzles up letter written with chalk, and remaining chalk dust falls in the side ash chamber of opposite side.Enter the work in gravity for the chalk dust in each ash chamber With under down, fall in the grey room of the bottom being arranged on wiping board main body.Blackboard eraser in use habit many using back and forth wiping back and forth Form, be therefore equipped with soft bristle on the front of two side of the intimate blackboard eraser of the present invention, no matter use when from the beginning of which side Wipe, or whether back and forth wipe, can ensure that chalk dust is collected in a manner described to grey room.

Wherein, the quantity of rub body can be two or three, even more many, preferably four.

Further, described rub body passes through Boards wall in described wiping board main body, and described clamping plate includes one and is fixed on plate Wipe the fixed plate in main body and a mobilizable activity folder, one end of described activity folder is connected through the hinge in described fixed plate One end, the other end of described activity folder is connected through the hinge a movable axis, and the end of described movable axis is provided with a buckle, by institute State the other end that buckle is fixed on described fixed plate.

Wherein, one end that described fixed plate is connected with activity folder is provided with a flange, described plate and the activity folder of being connected It is hingedly connected on described flange, described rub body is embedded in described flange.Preferably, the thickness of the length of described flange and rub body Degree is identical.

After the intimate blackboard eraser of the present invention is using a period of time, rub body is dirty, it is only necessary to open when needing cleaning or replacing Buckle, by hinge mobile activity folder, you can take off rub body and be carried out or replace.

Further, the thickness on described rub body top is slightly thicker than the thickness of bottom.Because generally we are in use habit, Always like holding the middle and lower part of blackboard eraser when erasing the board, and when holding middle and lower part, the power on top is relatively small, be difficult to The chalk trace on top is wiped.When rub body top thickness be slightly thicker than bottom when, protrusion partly can make up firmly not Uniformly.

Preferably, from top to bottom thickness is gradually little for described rub body.

Further, the top of described grip part is less than the top of described blackboard eraser main body；Or ground, described blackboard eraser main body Back is provided with a recess, and described grip part is in described recess.So when erasing the board, blackboard eraser main body can be blocked and waft Shed a small amount of dust coming.

Further, described grip part is provided with finger recess, is easy to grip.

Due to employing technique scheme, the invention has the beneficial effects as follows: the intimate blackboard eraser of the present invention passes through soft bristle With rub body, most of chalk dust is swept in the grey room falling into blackboard eraser lower body part, avoid chalk dust well and disorderly fly.

Brief description

Fig. 1 is a kind of structural representation of the preferred embodiment of intimate blackboard eraser of the present invention.

Fig. 2 is the clamp region schematic diagram of intimate blackboard eraser shown in Fig. 1.

The rub body of the main body for intimate blackboard eraser shown in Fig. 1 for the Fig. 3 by Boards wall, show by the structure in wiping board main body It is intended to.

Fig. 4 is the structural representation at the rear portion visual angle of embodiment shown in Fig. 1.

Fig. 5 is the lateral plan of the rub body of the present invention one preferred embodiment.

Specific embodiment

Below in conjunction with drawings and Examples, the present invention is described in detail, but the present embodiment is not limited to this Bright, the analog structure of every employing present invention and its similar change, all list the protection domain of claims of the present invention in.

Intimate blackboard eraser as depicted, including blackboard eraser main body 1 and grip part 2, grip part 2 is located at the back of the body of blackboard eraser main body 1 Portion.Wherein, the top of grip part 2 is less than the top of blackboard eraser main body 1, and so when erasing the board, blackboard eraser main body 1 can be blocked The a small amount of dust flying away out, it is to avoid adhere on hand.

Wherein grip part 2 is provided with finger recess 21, is easy to grip.As illustrated, the left and right sides is designed with grip part 2 Multiple finger recesses 21, the angle that user can like according to oneself is gripped.

In the present embodiment, it is provided with the rub body 12 of four parallel arrangements in blackboard eraser main body 1, wiping board master is fixed on by clamping plate 18 In body 1.Wherein outermost two rub bodies 12 are kept at a certain distance away with the side wall 11 of blackboard eraser main body 1 respectively and form two sides ash chamber 13, ash chamber 14 in the middle of the formation that keeps at a certain distance away between each adjacent rub body, the front of the two side 11 of blackboard eraser main body 1 is provided with soft brush Hair 15, the bottom of wiping board main body 1 is provided with a removable cassette 16, forms grey room between the bottom of box body 16 and rub body 12 bottom 17.In conjunction with shown in Fig. 2 and Fig. 3, clamping plate 18 includes a fixed plate 181 being fixed in blackboard eraser main body 1 and a mobilizable activity Folder 184, one end of fixed plate 181 is provided with a flange 182, and one end of activity folder 184 is connected on flange 182 by hinge 183, Parallel arrangement is embedded in flange 182 each rub body 12 successively.The length of flange 182 is identical with the thickness of rub body 12, conveniently will wipe Body 12 sandwiches in clamping plate 18, avoids making rub body 12 be damaged by excessive grip force again.The other end of activity folder 184 passes through hinge Chain 183 connects a movable axis 185, and the end of movable axis 185 is provided with a buckle 186, is fixed on fixed plate 181 by buckle 186 The other end so that rub body is fixed in clamping plate 18.

As preferred embodiment, in the present embodiment, the thickness on rub body 12 top is more slightly longer than the thickness of bottom, permissible Be preferably by gradually little from lower thickness, as shown in Figure 5.Because generally we are in use habit, when erasing the board always Like holding the middle and lower part of blackboard eraser, and when holding middle and lower part, the power on top is relatively small, be difficult to the chalk trace on top to wipe Fall.When the thickness on rub body 12 top is slightly thicker than bottom, protrusion partly can make up firmly uneven.

When erasing the board, be first soft bristle 15 close to letter written with chalk, chalk dust be swept up side ash chamber 13 in, followed by rub body 12 Contact letter written with chalk, the chalk dust under sweeping is swept up in middle ash chamber 14 thereafter, when first rub body 12 streaks still without powder When pen touch mark is wiped clean, second rub body 12 continues inswept letter written with chalk, and the chalk dust under sweeping falls in middle ash chamber 14 thereafter, The letter written with chalk so until last rub body 12 nuzzles up, remaining chalk dust falls in the side ash chamber 13 of opposite side.Enter each ash chamber Chalk dust under gravity down, fall in the grey room 17 of the bottom being arranged on wiping board main body 1.

Claims (9)

1. a kind of intimate blackboard eraser it is characterised in that: include blackboard eraser main body and grip part, described grip part is located at described blackboard eraser master The back of body, is provided with the rub body of n parallel arrangement in described blackboard eraser main body, the thickness on described rub body top is slightly larger than described rub body The thickness of bottom, forms both sides ash with the sidewall spacers certain distance of described blackboard eraser main body respectively positioned at outermost two rub bodies Chamber, ash chamber in the middle of the formation that keeps at a certain distance away between two adjacent rub bodies, the front of the two side of described blackboard eraser main body is provided with soft brush Hair, the bottom of described blackboard eraser main body is provided with a removable cassette, forms grey room between the bottom of box body and described rub body bottom, n≥2.

2. as claimed in claim 1 intimate blackboard eraser it is characterised in that: described rub body pass through Boards wall in described blackboard eraser master In vivo, described clamping plate includes a fixed plate being fixed in blackboard eraser main body and a mobilizable activity is pressed from both sides, and the one of described activity folder End is connected through the hinge in one end of described fixed plate, and the other end of described activity folder is connected through the hinge a movable axis, described The end of movable axis is provided with a buckle, is fixed on the other end of described fixed plate by described buckle.

3. as claimed in claim 2 intimate blackboard eraser it is characterised in that: described fixed plate is provided with one end of being connected of activity folder One flange, the described plate that is connected is hingedly connected on described flange with what activity was pressed from both sides, and described rub body is embedded in described flange.

4. as claimed in claim 3 intimate blackboard eraser it is characterised in that: the length of described flange is identical with the thickness of rub body.

5. as claimed in claim 1 intimate blackboard eraser it is characterised in that: from top to bottom thickness is gradually little for described rub body.

6. as claimed in claim 1 intimate blackboard eraser it is characterised in that: the top of described grip part be less than described blackboard eraser main body Top.

7. as claimed in claim 1 intimate blackboard eraser it is characterised in that: the back of described blackboard eraser main body is provided with a recess, institute State grip part in described recess.

8. as claimed in claim 1 intimate blackboard eraser it is characterised in that: described grip part is provided with finger recess.

9. as claimed in claim 1 intimate blackboard eraser it is characterised in that: the quantity of described rub body be four.