CN210680234U

CN210680234U - Blackboard eraser

Info

Publication number: CN210680234U
Application number: CN201920185132.4U
Authority: CN
Inventors: 刘佳颖
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-02-02
Filing date: 2019-02-02
Publication date: 2020-06-05
Anticipated expiration: 2029-02-02

Abstract

The utility model relates to the field of teaching aids, in particular to a blackboard eraser, which comprises a blackboard eraser body and eraser cloth, wherein the blackboard eraser body is of a shell structure, a worm and a transmission rod are respectively arranged on the blackboard eraser body, a walking front wheel is arranged at two ends of the worm, and a walking rear wheel is arranged at two ends of the transmission rod; one side of the blackboard eraser body is provided with a rotating wheel, the other side of the blackboard eraser body is provided with a dust storage chamber, the rotating wheel is connected with a worm through a turbine, and the rotating wheel is provided with a piece of wiping cloth; the transmission rod is provided with a wind wheel. The utility model has the advantages of simple structure compactness, can effectively collect the blackboard eraser body with the particulate matter in the chalk dust, reduce the harm to the human body.

Description

Blackboard eraser

Technical Field

The utility model belongs to the technical field of teaching aid and specifically relates to a blackboard eraser.

Background

The chalk is widely applied to teaching tools and is generally used for writing on a blackboard. Most of the chalk dust particles are more than 100 microns, the chalk dust is easily sucked into the lung by a teacher in the teaching process, most of the chalk dust is blocked in the alveolus of a human body, the chalk dust enters the lung through the nose, the pharynx and the bronchus, part of the chalk dust stays in the nose, the pharynx and the bronchus in the teaching process, mechanical stimulation and damage are generated to mucous membranes at the positions, and the chalk dust easily induces diseases and even canceration of the nasopharynx, the bronchus and other parts when working in an environment with overhigh concentration of the chalk dust for a long time. Once the chalk dust enters eyes, alkaline substances generated by hydrolysis of calcium carbonate in the chalk dust by tears stimulate eye mucous membranes, so that mucous membranes are damaged to form chronic inflammation.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a blackboard eraser with simple structure and good dust collection effect.

The utility model adopts the following technical scheme:

a blackboard eraser comprises a blackboard eraser body and eraser cloth, wherein the blackboard eraser body is of a shell structure, a worm and a transmission rod are respectively arranged on the blackboard eraser body, a walking front wheel is arranged at two ends of the worm, and a walking rear wheel is arranged at two ends of the transmission rod; one side of the blackboard eraser body is provided with a rotating wheel, the other side of the blackboard eraser body is provided with a dust storage chamber, the rotating wheel is connected with a worm through a turbine, and the rotating wheel is provided with a piece of wiping cloth; the transmission rod is provided with a wind wheel.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model has the advantages of compact, simple structural design, can inhale the dust storage room with the chalk dust when wiping the blackboard.

Further, the utility model discloses a preferred scheme is:

the rotating wheel comprises a first rotating wheel and a second rotating wheel, the first rotating wheel and the second rotating wheel are connected with the blackboard eraser body through a first rotating shaft and a second rotating shaft respectively, a first turbine coaxial with the first rotating wheel is arranged on the first rotating shaft, and a second turbine coaxial with the second rotating wheel is arranged on the second rotating shaft.

The worm is provided with a first spiral groove and a second spiral groove corresponding to the first worm wheel and the second worm wheel respectively, and the rotating directions of the first spiral groove and the second spiral groove are opposite.

The dust storage chamber is provided with a filter screen.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of FIG. 1;

in the figure: a blackboard eraser body 1; a traveling front wheel 2; a worm 3; a first spiral groove 301; a second spiral groove 302; a turbine 4; a first turbine 401; a second turbine 402; a rotating shaft 5; a first rotating shaft 501; a second rotating shaft 502; a rotating wheel 6; rotating a wheel I601; a second rotating wheel 602; a dust storage chamber 7; a filter screen 8; a transmission rod 9; a traveling rear wheel 10; a baffle plate 11; a wind wheel 12; an ash inlet channel 13.

Detailed Description

The invention is further described with reference to the following figures and specific embodiments.

Referring to the attached

drawings

1 and 2, the blackboard eraser comprises a blackboard eraser body 1 and eraser cloth, wherein the blackboard eraser body 1 is of a shell structure, a worm 3 and a transmission rod 9 are respectively arranged on the blackboard eraser body 1, the transmission rod 9 is arranged on the rear side of the worm 3, two ends of the worm 3 are respectively provided with a front walking wheel 2, and two ends of the transmission rod 9 are respectively provided with a rear walking wheel 10.

Referring to fig. 2, a rotating wheel one 601 and a rotating wheel two 602 are arranged at the front part of the blackboard eraser body 1, the rotating wheel one 601 is connected with the blackboard eraser body 1 through a rotating shaft one 501, the rotating wheel two 602 is connected with the blackboard eraser body 1 through a rotating shaft two 502, a turbine one 401 coaxial with the rotating wheel one 601 is fixed on the rotating shaft one 501, a turbine two 402 coaxial with the rotating wheel two 602 is fixed on the rotating shaft two 502, a spiral groove one 301 and a spiral groove two 302 are respectively arranged on the worm 3 corresponding to the turbine one 401 and the turbine two 402, and the rotation directions of the spiral groove one 301 and the spiral groove two 302 are reversely arranged, so that the rotating wheel one 601 and the rotating wheel two 602 meet the opposite.

Referring to the attached drawing 1, the rear portion of the blackboard eraser body 1 is provided with a dust storage chamber 7, the left and right sides of the inlet of the dust storage chamber 7 are respectively and correspondingly provided with a baffle 11 (as shown in fig. 2) connected with the inner walls of the left and right sides of the blackboard eraser body 1, an ash inlet channel 13 is formed between the two baffles 11, a filter screen 8 is arranged on the rear side surface of the blackboard eraser body 1 corresponding to the dust storage chamber 7, and the aperture of the sieve mesh of the filter screen 8 is smaller than the diameter of particles in chalk ash.

The wind wheel 12 is arranged at the position of the transmission rod 9 corresponding to the inlet of the dust storage chamber 7, and the wind wheel 12 blows chalk dust into the dust storage chamber 7.

The utility model discloses during the application, fix two wiping cloths respectively on two swiveling wheels 6, hand blackboard eraser body 1 rolls on the blackboard, walking front wheel 2 rotates with walking rear wheel 10 simultaneously, walking front wheel 2 makes two turbines 4 rotate through driving worm 3 rotation, namely turbine one 401 and turbine two 402 rotate in opposite directions simultaneously, turbine one 401, turbine two 402 drive swiveling wheel one 601, swiveling wheel two 602 to rotate through rotation axis 5 that correspond separately respectively, the wiping cloths on two swiveling wheels 6 are erased the chalk word on the blackboard simultaneously and are brought the chalk dust into dust inlet channel 13 in the rotation process; the traveling rear wheel 10 rotates to enable the transmission rod 9 to drive the wind wheel 12 to rotate, the wind wheel 12 rotates to blow turbid air with chalk dust into the dust storage chamber 7, the diameter of particles in the chalk dust is larger than that of sieve holes of the filter screen 8, therefore, the particles are left in the dust storage chamber 7, and clean air is purified and discharged into the air after passing through the filter screen 8. And then, wiping the blackboard for the second time by using clean wiping cloth to ensure that the blackboard is cleaner.

The cleaning cloth on the rotating wheel 6 and the filter screen 8 of the dust storage chamber 7 in the embodiment are detachable, so that the cleaning cloth can be conveniently replaced and cleaned after being used for multiple times, and when the dust particles in the dust storage chamber 7 are too many, the filter screen 8 is detached to be cleaned and the particles in the dust storage chamber 7 are uniformly treated.

The utility model has the advantages of compact, simple structural design, can inhale dust storage room 7 with the chalk dust when wiping the blackboard.

The above is only the concrete implementation manner of the present invention, and the protection of the present invention is not limited thereto, and all the equivalent changes or replacements proposed to the technical features of the present technical solution, which can be considered by those skilled in the art, are covered within the protection scope of the present invention.

Claims

1. The blackboard eraser comprises a blackboard eraser body and eraser cloth, wherein the blackboard eraser body is of a shell structure and is characterized in that: the blackboard eraser body is respectively provided with a worm and a transmission rod, two ends of the worm are provided with walking front wheels, and two ends of the transmission rod are provided with walking rear wheels; one side of the blackboard eraser body is provided with a rotating wheel, the other side of the blackboard eraser body is provided with a dust storage chamber, the rotating wheel is connected with a worm through a turbine, and the rotating wheel is provided with a piece of wiping cloth; the transmission rod is provided with a wind wheel;

the rotating wheel I and the rotating wheel II are respectively connected with the blackboard eraser body through a rotating shaft I and a rotating shaft II, a turbine I coaxial with the rotating wheel I is arranged on the rotating shaft I, a turbine II coaxial with the rotating wheel II is arranged on the rotating shaft II, and the turbine I and the turbine II rotate in opposite directions at the same time;

the worm is provided with a first spiral groove and a second spiral groove corresponding to the first turbine and the second turbine respectively, and the rotating directions of the first spiral groove and the second spiral groove are opposite; the dust storage chamber is provided with a detachable filter screen.