CN203697812U

CN203697812U - Electric blackboard eraser used for English teaching

Info

Publication number: CN203697812U
Application number: CN201420006449.4U
Authority: CN
Inventors: 徐国伟; 林玉生; 陈耿庆
Original assignee: Northeast Petroleum University
Current assignee: Northeast Petroleum University
Priority date: 2014-01-06
Filing date: 2014-01-06
Publication date: 2014-07-09
Anticipated expiration: 2024-01-06

Abstract

An electric blackboard eraser used for English teaching helps to mainly solve problems that a conventional blackboard eraser which usually has a simple structure of a soft hairbrush plus a base plate does not have a dust-absorbing function and is time-consuming and labor-consuming for blackboard wiping. The electric blackboard eraser is characterized in that a driving shaft is arranged between the left end of an upper frame and the left end of a lower frame, a driven shaft is arranged between the right end of the upper frame and the right end of the lower frame, and two ends of each of the driving shaft and the driven shaft are equipped with sprocket wheels; the two sets of sprocket wheels are connected via chains; a connection support is fixed between the upper chain and the lower chain via bolts; a box body is fixed to the inner side of the connection support, and a soft cloth brush is fixed to the inner side of the box body and keeps contacting a blackboard; and a plurality of round holes is disposed in the soft cloth brush, blades are arranged in the round holes, and micro-motors are fixed to positions, corresponding to the round holes, in the box body. A motor is adopted to control the blackboard eraser to move left and right, so labor and time is saved. Moreover, the electric blackboard eraser has a dust-absorbing function to prevent the health of teachers and students from being affected by dust pervading a classroom.

Description

A kind of electric blackboard eraser for English teaching

Technical field

The utility model relates to a kind of teaching aid, is specifically related to a kind of auxiliary teaching device being applied in English teaching use.

Background technology

Blackboard eraser is instrument indispensable in school instruction process, is widely used.Using at present in English teaching field is only the structure that banister brush simple in structure adds base plate for the blackboard eraser that teacher's writing on the blackboard is used is provided, and does not possess dust-absorbing function; And must erase the board by the hand-held blackboard eraser of manpower, need a large amount of writing on the blackboard in process of English teaching, teacher at school during, while wiping monoblock blackboard, can ache by arm, and take up a large amount of dust while erasing the board, affected to a great extent the healthy of teacher.

Summary of the invention

In order to solve the technical problem of mentioning in background technology, the utility model provides a kind of electric blackboard eraser for English teaching, and this kind of blackboard eraser adopts the side-to-side movement of Electric Machine Control blackboard eraser, time saving and energy saving; And can, when teacher erases the board, dust be received in box, guaranteed that preferably English teacher's is healthy.

The technical solution of the utility model is: this kind is for the electric blackboard eraser of English teaching, comprise the upper side frame and the lower frame that are separately fixed at blackboard top and bottom, its unique distinction is: through described upper side frame and lower frame, be fixed with driving shaft and driven shaft by upper and lower two cover bearings respectively at left and right two ends, the upper end of driving shaft is connected with motor by shaft coupling; The axle head of driving shaft and driven shaft is all coaxially connected with sprocket wheel, between the left and right two groups of sprocket wheels on same level line by transmission after chain interlock; Between upper and lower two chains, be bolted link.Described link is strip, and the inboard of link is fixed with box body, described box body inner hollow, and the inboard of box body is fixed with soft cloth brush, and described soft cloth brush and blackboard keep in touch; On soft cloth brush, have some round holes, described round hole does not penetrate soft cloth brush, and circle is provided with blade in hole, and position corresponding with described round hole in box body is fixed with respectively micromachine, and micromachine is coaxially connected with blade; Around the rotating shaft of described micromachine, penetrate box body and have some dust inlet holes; The upper end of lower frame is provided with the dust receiving slit of a level, and the lower end of box body has dust leadout hole, and described dust leadout hole is positioned at the vertical direction of dust receiving slit; On top the two ends, left and right of frame are respectively equipped with left limit piece and right limit piece.

The utlity model has following beneficial effect: this kind is respectively equipped with driving shaft and driven shaft for left end and the right-hand member of the upper and lower frame of the electric blackboard eraser of English teaching, the two ends of driving shaft and driven shaft are provided with sprocket wheel, between the two groups of sprocket wheels in left and right, be provided with chain, on chain, be fixed with link, move left and right blackboard wiping by the soft cloth brush on driving shaft, driven shaft, sprocket wheel and chain-driving link, facilitate teacher's use; In addition, on top the two ends, left and right of frame are respectively equipped with left limit piece and right limit piece, to realize, link are slided and unlikely coming off in fixing blackboard region; Teacher is in erasing the board, and the micro motor for driving blade of box body inside is worked simultaneously, will automatically siphon away the dust falling while erasing the board, has guaranteed the health of teacher's health; Collect pen ash by dust receiving slit, the chalk dust recoverable of collection is made chalk again and is used, energy-conservation environmental protection again.Apparatus structure novelty, easy to use, there is stronger practicality.

Accompanying drawing explanation:

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

Fig. 2 is that the A-A of Fig. 1 is to cutaway view.

1-blackboard in figure, 2-driving shaft, 3-driven shaft, 4-upper side frame, 5-lower frame, 6-sprocket wheel, 7-chain, 8-shaft coupling, 9-motor, 10-bolt, 11-link, 12-box body, 13-circle hole, 14-blade, 15-left limit piece, 16-right limit piece, 17-dust collection groove, 18-soft cloth brush, 19-motor positive and inverse switch.

The specific embodiment:

Below in conjunction with accompanying drawing, the utility model is described in further detail:

By Fig. 1 in conjunction with shown in Fig. 2, this kind is for the electric blackboard eraser of English teaching, comprise the upper side frame 4 and the lower frame 5 that are separately fixed at blackboard 1 top and bottom, its unique distinction is: through described upper side frame 4 and lower frame 5, be fixed with driving shaft 2 and driven shaft 3 by upper and lower two cover bearings respectively at left and right two ends, the upper end of driving shaft 2 is connected with motor 9 by shaft coupling 8; The axle head of driving shaft 2 and driven shaft 3 is all coaxially connected with sprocket wheel 6, between the left and right two groups of sprocket wheels 6 on same level line by transmission after chain 7 interlocks; Between upper and lower two chains 7, be fixed with link 11 by bolt 10.

Described link 11 is strip, and the inboard of link 11 is fixed with box body 12, described box body 12 inner hollow, and the inboard of box body 12 is fixed with soft cloth brush 18, and described soft cloth brush 18 keeps in touch with blackboard 1; On soft cloth brush 18, have some round holes 13, described round hole 13 does not penetrate soft cloth brush 18, and circle is provided with blade 14 in hole 13, and position corresponding with described round hole 13 in box body 12 is fixed with respectively micromachine, and micromachine is coaxially connected with blade 14; Around the rotating shaft of described micromachine, penetrate box body 12 and have some dust inlet holes; The upper end of lower frame 5 is provided with the dust receiving slit 17 of a level, and the lower end of box body 12 has dust leadout hole, and described dust leadout hole is positioned at the vertical direction of dust receiving slit 17.

In addition, consider whole blackboard eraser is limited in the region of blackboard and is moved, be respectively equipped with left limit piece 15 and right limit piece 16 at the two ends, left and right of described upper side frame 4, to realize, link 11 is slided and unlikely coming off in fixing blackboard 1 region.

When concrete enforcement, be provided with motor positive and inverse switch 19 at the right-hand member of described lower frame 5, motor positive and inverse switch 19 is carried out forward by circuit for controlling motor control motor 9 and is still reversed.No matter motor 9 is to carry out forward or reversion to micromachine in box body, and its electrical source of power provides loop all can be switched on, and starts to carry out dust suction operation.

When application, this kind of device is fixed on the metope in classroom, serve as a teacher in the time erasing the board, switch on power and control circuit, press motor positive and inverse switch 19 and get final product moving left and right of control connection frame 11, micromachine in box body 12 and coupled blade 14 are worked simultaneously, the dust can be automatically coming off when erasing the board sucks in box body 12, and afterwards, dust can fall in dust receiving slit 17, dust receiving slit 17 can slide out from fixed position, can clear up dust.

Claims

1. the electric blackboard eraser for English teaching, comprise the upper side frame (4) and the lower frame (5) that are separately fixed at blackboard (1) top and bottom, it is characterized in that: through described upper side frame (4) and lower frame (5), be fixed with driving shaft (2) and driven shaft (3) by upper and lower two cover bearings respectively at left and right two ends, the upper end of driving shaft (2) is connected with motor (9) by shaft coupling (8); The axle head of driving shaft (2) and driven shaft (3) is all coaxially connected with sprocket wheel (6), is positioned between the left and right two groups of sprocket wheels (6) on same level line by transmission after chain (7) interlock; Between upper and lower two chains (7), be fixed with link (11) by bolt (10);

Described link (11) is strip, the inboard of link (11) is fixed with box body (12), described box body (12) inner hollow, the inboard of box body (12) is fixed with soft cloth brush (18), and described soft cloth brush (18) keeps in touch with blackboard (1); On soft cloth brush (18), have some round holes (13), described round hole (13) does not penetrate soft cloth brush (18), in circle hole (13), blade (14) is installed, position corresponding with described round hole (13) in box body (12) is fixed with respectively micromachine, and micromachine is coaxially connected with blade (14); Around the rotating shaft of described micromachine, penetrate box body (12) and have some dust inlet holes; The upper end of lower frame (5) is provided with the dust receiving slit (17) of a level, and the lower end of box body (12) has dust leadout hole, and described dust leadout hole is positioned at the vertical direction of dust receiving slit (17); On top the two ends, left and right of frame (4) are respectively equipped with left limit piece (15) and right limit piece (16).