CN209008251U

CN209008251U - A kind of telescopic lever formula dust-proof blackboard eraser

Info

Publication number: CN209008251U
Application number: CN201820359187.8U
Authority: CN
Inventors: 李欣恬; 刘佳; 雷雪松
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-03-15
Filing date: 2018-03-15
Publication date: 2019-06-21
Anticipated expiration: 2028-03-15

Abstract

The utility model relates to a kind of telescopic lever formula dust-proof blackboard erasers, including telescopic rod, the blackboard eraser being mounted on telescopic rod and the dirt-collecting box being set to below blackboard eraser, the attachment device that the telescopic rod is equipped with convenient for blackboard eraser installation, the position between the dirt-collecting box and blackboard eraser are relatively fixed.When being erased the board using the blackboard eraser of the utility model, student on duty can adjust the length of telescopic rod according to the height condition of oneself, so as to the chalk writing at the top of convenient erasing blackboard, dirt-collecting box is arranged in the lower section of blackboard eraser in the utility model, institute's scraping chalk dust dirt can be fallen into dirt-collecting box, to effectively prevent drifting everywhere for chalk dust, it is ensured that the physical and mental health of teachers and students.

Description

A kind of telescopic lever formula dust-proof blackboard eraser

Technical field

The utility model relates to aided education appliance technologies, specifically, refer to that a kind of telescopic lever formula is dust-proof black Blackboard eraser.

Background technique

Black board teaching facilitates writing due to having the characteristics that, become teaching method that classroom instruction can not be substituted completely it One, blackboard eraser is one of indispensable aided education apparatus of institute in black board teaching.Teacher writes usually on blackboard, draws, When being explained, a class just need it is erasable for several times, often can all leave one layer on hand, on sleeve or even on hair, shoulder The chalk dust of white.If things go on like this, teachers association suffers from pneumoconiosis, during cleaning blackboard with blackboard eraser, chalk dust It can fly upward everywhere, also will have a direct impact on the physical and mental health of teachers and students.After classroom, one two students on duty is often arranged to black Plate, but it is generally shorter for pupil's height in the case of, they erase the board gruelling, it is sometimes desirable to which standing on stool could handle Blackboard is cleaned out, and is not only due to chalk dust and is easily caused the health problem of student on duty, and is also easy to step on student on duty The safety accident slided and fallen.

In the prior art, in addition to artificial blackboard eraser, following several blackboard erasers are had also appeared at present: such as electric blackboard eraser, being led to The effect for crossing magnet makes the rubbing head of blackboard eraser be close to blackboard, to thoroughly clean blackboard；Dust absorption blackboard eraser passes through Small-sized suction cleaner Absorb chalk dust, including automatic blackboard eraser；Source dust-collecting eraser is wiped, is inhaled, filter, row one using electronic and electromagnetic induction principle Gas is breathed out into；Chalk dust inspiration is filtered off dust, then arranged by automatic absorbing dust blackboard eraser, the vacuum generated using high-speed motor rotation Clean air out.However, these blackboard erasers have the defects that structure is complicated, with high costs, this defect limits electronic The popularization and application of blackboard eraser product.

Therefore it provides a kind of have dust-proof and Telescopic, and low-cost blackboard eraser, it is those skilled in the art Technical problem urgently to be resolved.

Utility model content

In view of this, it is anti-to provide a kind of telescopic lever formula the purpose of the utility model is to overcome the deficiencies in the prior art Dirt blackboard eraser can effectively prevent chalk dust to solve blackboard eraser in the prior art not and impact to teachers and students' health and not The problem of being used suitable for pupil.

The technical scheme adopted by the utility model to solve the technical problem is as follows:

A kind of telescopic lever formula dust-proof blackboard eraser is provided, including telescopic rod, the blackboard eraser being mounted on telescopic rod and is set The dirt-collecting box being placed in below blackboard eraser, the telescopic rod be equipped with convenient for blackboard eraser installation attachment device, the dirt-collecting box with Position between blackboard eraser is relatively fixed.

Based on the above technical solution, the utility model can also do following improvement.

Further, the attachment device is the collet that can clamp the shell of blackboard eraser.

Further, the collet is in Contraband type structure, and the free end in collet section has can be by the shell clamping of blackboard eraser Crotch.

Further, bolt hole is additionally provided on the collet, the depth that the shell of blackboard eraser screws in bolt hole by bolt is tight Gu in collet.

Further, the rotating device that blackboard eraser can be made to rotate is equipped between the collet and telescopic rod.

Further, the rotating device include the intermediate plate being set on collet, be movably connected between intermediate plate hollow turn Axis, through intermediate plate and the fastening bolt of hollow rotating shaft and the fastening nut being adapted to fastening bolt, telescopic rod and hollow rotating shaft It is fixedly connected, the angle that collet passes through the cooperation of fastening bolt and fastening nut fixed rotation on telescopic rod.

Further, the side of the dirt-collecting box and the rubbing head of blackboard eraser are concordant, the back of another lateral blackboard eraser of dirt-collecting box Face extends.

Further, sponge is equipped in the dirt-collecting box.

Further, the telescopic rod is automatic telescopic link or manual telescopic bar.

Further, the material of the telescopic rod, collet and dirt-collecting box is plastics, aluminium alloy or stainless steel.

Compared with prior art, the utility model have the following advantages that and the utility model has the advantages that

(1) when being erased the board using the blackboard eraser of the utility model, student on duty can be adjusted according to the height condition of oneself to stretch The length of contracting bar, so as to the chalk writing at the top of convenient erasing blackboard, the utility model is arranged in the lower section of blackboard eraser Dirt-collecting box, institute's scraping chalk dust dirt can be fallen into dirt-collecting box, to effectively prevent drifting everywhere for chalk dust, it is ensured that The physical and mental health of teachers and students.

(2) wiping blackboard structure of the utility model is simple, can produce the utility model by simple procedure of processing Product, compared with the existing technology in electric blackboard eraser, the more energy efficient environmental protection of the utility model, and cheap is conducive to The popularization and use of blackboard eraser.

(3) sponge is set in the dirt-collecting box of the utility model, and sponge can store the moisture of a part, work as chalk dust It falls into after dirt-collecting box, will not generate due to shaking dirt-collecting box and cause the secondary effect drifted of chalk dust, thus further Play effective dustproof effect.

(4) collet of the utility model can relative telescopic bar adjust certain rotational angle, be conducive to keep blackboard eraser Rubbing head be tightly attached to the surface of blackboard in parallel, to guarantee the good erasing effect of blackboard eraser, and be conducive to user's use When it is more labor-saving.

(5) bolt is arranged in the utility model on collet, and can be by blackboard eraser by the depth that bolt screws in collet Shell is firm to be clamped on collet, thus ensure that when being erased the board using the blackboard eraser of the utility model will not due to loosening and It falls.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is the side view of the utility model；

Fig. 2 is the rearview of the utility model；

Fig. 3 is the schematic perspective view of the collet of the utility model；

In figure, 1-telescopic rod；2-collets；3-dirt-collecting box；4-rotating devices；41-intermediate plates；42-hollow rotating shafts； 43-fastening bolts；44-fastening nuts；5-sponges；6-crotches；7-shells；8-rubbing heads；9-bolts.

Specific embodiment

To keep the purpose of this utility model, technical solution and advantage clearer, below by the technology to the utility model Scheme is described in detail.Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than comprehensively Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not before making creative work Obtained all other embodiment is put, the range that the utility model is protected is belonged to.

Embodiment 1:

A kind of telescopic lever formula dust-proof blackboard eraser including telescopic rod 1, is mounted on telescopic rod 1 as shown in Figure 1 to Figure 3 Blackboard eraser and dirt-collecting box 3, telescopic rod 1 is automatic telescopic link or manual telescopic bar, for example, by using the structure of similar self-timer rod-type, or Person uses the structure of umbrella rod-type, and details are not described herein.Telescopic rod 1 has multi-joint telescoping length, uses in order to meet The demand of writing at the top of person's erasing blackboard, blackboard eraser and dirt-collecting box 3 are all set on last pole of telescopic rod 1, and blackboard It wipes and keeps certain spacing between dirt-collecting box 3.The folder that blackboard eraser can be clamped is equipped on last pole of telescopic rod 1 First 2, in order to the installation and removal of blackboard eraser, dirt-collecting box 3 is then welded on last pole of telescopic rod 1.

When being erased the board using the blackboard eraser of the utility model, user adjusts according to the height condition of oneself flexible first The length of bar enables the writing of any position on the blackboard eraser erasing blackboard on collet 2 to make relative to traditional blackboard eraser User on stool, avoids due to stepping on the problem of sliding and causing safety accident, and improve efficiency without station.Erase process In, institute's scraping chalk dust dirt is fallen into dirt-collecting box under the effect of gravity, avoids the problem of chalk dust drifts everywhere, is reduced The amount of the chalk dust of teachers and students' sucking, ensures that the physical and mental health of teachers and students.

Embodiment 2:

Preferably, being advanced optimized on the basis of the above embodiments for the present invention is better achieved, especially use Following setting structures:

As shown in Figure 1 to Figure 3, in order to facilitate the installation and removal of blackboard eraser, the collet 2 of the utility model be can be designed as Contraband type structure, having in the free end in 2 section of collet can be by the crotch 6 of 7 clamping of shell of blackboard eraser, and in collet 2 Bolt hole is additionally provided on bottom plate.When installation, first blackboard eraser is inserted into collet 2, bolt 9 is reused and screws in bolt hole, pass through The shell 7 of blackboard eraser is pushed against on crotch 6 by the depth that bolt 9 screws in, to prevent the loosening of blackboard eraser；When disassembly, loosen Blackboard eraser can be extracted out from collet 2 after bolt 9.

Embodiment 3:

As shown in Figure 1 to Figure 3, in order to keep blackboard eraser rubbing head 8 and blackboard it is coplanar, between collet 2 and telescopic rod 1 Equipped with the rotating device 4 that blackboard eraser can be made to rotate, which includes the intermediate plate 41 being set on collet 2, is flexibly connected It is hollow rotating shaft 42 between intermediate plate 41, suitable through the fastening bolt 43 of intermediate plate 41 and hollow rotating shaft 42 and with fastening bolt 43 The fastening nut 44 matched, telescopic rod 1 are fixedly connected with hollow rotating shaft 42, when adjusting, loosen fastening bolt 43 and rotate collet 2 to Suitable angle position, then tighten fastening bolt 43 and fastening nut 44, make it is relatively fixed between intermediate plate 41 and hollow rotating shaft 42, Skidding between intermediate plate 41 and hollow rotating shaft 42 in order to prevent can also add skid-proof rubber between intermediate plate 41 and hollow rotating shaft 42 Pad.

As shown in Figure 1 to Figure 3, the side of dirt-collecting box 3 is concordant with the rubbing head 8 of blackboard eraser, on the one hand will not be due to dirt-collecting box 3 It excessively protrudes and influences to wipe effect, be on the other hand conducive to catch institute's scraping chalk dust dirt；Dirt-collecting box 3 it is another lateral black The back side of blackboard eraser extends, and the chalk dust partially drifted when erasing can be made to also fall into dirt-collecting box 3.In addition, in dirt-collecting box 3 It is interior to be equipped with sponge 5, certain moisture is added in sponge 5, after chalk dust is fallen into dirt-collecting box 3, will not be generated due to shaking It moves dirt-collecting box 3 and causes the secondary effect drifted of chalk dust.

Embodiment 4:

The material of the telescopic rod 1 of the utility model, collet 2 and dirt-collecting box 3 is plastics, aluminium alloy or stainless steel, is had Conducive to the firm of guarantee the utility model structure.

Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to In this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation Or replacement, it should be covered within the scope of the utility model.

Claims

1. a kind of telescopic lever formula dust-proof blackboard eraser, it is characterised in that: including telescopic rod (1), be mounted on it is black on telescopic rod (1) Blackboard eraser and the dirt-collecting box being set to below blackboard eraser (3), the connection dress that the telescopic rod (1) is equipped with convenient for blackboard eraser installation It sets, the position between the dirt-collecting box (3) and blackboard eraser is relatively fixed.

2. telescopic lever formula dust-proof blackboard eraser according to claim 1, it is characterised in that: the attachment device is that can incite somebody to action The collet (2) that the shell (7) of blackboard eraser clamps.

3. telescopic lever formula dust-proof blackboard eraser according to claim 2, it is characterised in that: the collet (2) is in Contraband type knot Structure, the free end in collet (2) section has can be by the crotch (6) of shell (7) clamping of blackboard eraser.

4. telescopic lever formula dust-proof blackboard eraser according to claim 3, it is characterised in that: be additionally provided on the collet (2) The shell (7) of bolt hole, blackboard eraser is fastened in collet (2) by the depth that bolt (9) screw in bolt hole.

5. telescopic lever formula dust-proof blackboard eraser according to claim 4, it is characterised in that: the collet (2) and telescopic rod (1) rotating device (4) that blackboard eraser can be made to rotate is equipped between.

6. telescopic lever formula dust-proof blackboard eraser according to claim 5, it is characterised in that: the rotating device (4) includes The intermediate plate (41) that is set on collet (2), the hollow rotating shaft (42) being movably connected between intermediate plate (41), through intermediate plate (41) with The fastening bolt (43) of hollow rotating shaft (42) and the fastening nut (44) being adapted to fastening bolt (43), telescopic rod (1) and sky Heart shaft (42) is fixedly connected, and collet (2) is solid on telescopic rod (1) by the cooperation of fastening bolt (43) and fastening nut (44) Surely the angle rotated.

7. telescopic lever formula dust-proof blackboard eraser according to claim 6, it is characterised in that: the side of the dirt-collecting box (3) Concordant with rubbing head (8) of blackboard eraser, the back side of another lateral blackboard eraser of dirt-collecting box (3) extends.

8. telescopic lever formula dust-proof blackboard eraser according to claim 7, it is characterised in that: be equipped in the dirt-collecting box (3) Sponge (5).

9. telescopic lever formula dust-proof blackboard eraser according to claim 8, it is characterised in that: the telescopic rod (1) is automatic Telescopic rod or manual telescopic bar.

10. telescopic lever formula dust-proof blackboard eraser according to claim 9, it is characterised in that: the telescopic rod (1), collet (2) and the material of dirt-collecting box (3) is plastics, aluminium alloy or stainless steel.