CN2895087Y

CN2895087Y - Automatic blackboard erasing device for upper-lower push-pull type blackboard

Info

Publication number: CN2895087Y
Application number: CN 200520116512
Authority: CN
Inventors: 靳婧
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-11-18
Filing date: 2005-11-18
Publication date: 2007-05-02
Anticipated expiration: 2015-11-18

Abstract

The invention relates to an automatic wiping black board device with up and down push-and-pull black boards. The device can realize an effect of automatic black board wiping by adopting the up and down push-and-pull black boards. The effect is realized by adding an upper wiping strip (2) and a lower wiping strip (4), both of which firmly stick on the two pieces of black board, on the basis of prior art structure of up and down push-and-pull black boards including a front black board (3) and a rear black board (1). Therefore, the purpose of automatic wiping of black boards with no electric force maycan be realized only by moving the two pieces of the black board up and down.

Description

A kind of automatic blackboard cleaning device of adapted type of push and pull up down blackboard

Technical field:

The utility model relates to the technology of erasing the board.

Background technology:

Having only manually with hand for the type of push and pull up down blackboard at present takes article such as blackboard eraser, rag, paper to erase the board---more bothersome, and if erase the board with blackboard eraser and a large amount of dust to be drifted aloft cause the chronic injury on teacher and the classmate's health; Though the blackboard for single face has electronic blackboard scraper for a long time,, they can only be fixed on the blackboard, and the occupation of land space is big, does not possess the condition that smears down Push-pull blackboard, and because it is in electriferous state always, relatively takes.

The utility model content:

The purpose of the utility model: be prior art-kind of improvement (need not the help of electric power when erasing the board).

The utility model is achieved in that preceding blackboard and the back blackboard that constitutes the type of push and pull up down blackboard, under the rear lower location of preceding blackboard, wipe bar, when preceding blackboard is positioned at uppermost position, the preceding bottom of blackboard before last wiping bar just in time is positioned at, and, on to wipe bar be by being positioned on the rear side wall of blackboard with its affixed spider.The form of push-and-pull blackboard reaches the effect of automatic blackboard cleaning about utilizing.

The utility model characteristics compared with the prior art:

Because can need not can realize the process of automatic blackboard cleaning under the condition of electric power help when the push-and-pull blackboard, this has just created condition for the purpose that reaches the utility model.

Description of drawings:

Fig. 1 has illustrated that one embodiment of the present of invention, Fig. 2 are the A-A profiles of Fig. 1.

1, back blackboard; 2, wipe bar on; 3, preceding blackboard; 4, wipe bar down; 5, spider.

The specific embodiment:

The utility model enforcement overview structurally is as follows:

Last wiping bar 2 all is to have one side to be fixed with the rectangular solid of the hair side flexible material on the thicker similar blackboard eraser with wiping bar 4 down, spider 5 is the reeded supports on the wall behind the blackboard that are fixed on, last wiping bar 2 two ends exceed the position and spider 5 Joints (exceeding part inserts in the groove) of blackboard width, thereby wiping bar 2 is positioned on the back wall of blackboard.The one side of hair side flexible material contact with the one side that preceding blackboard 3 is used to write (3 pairs on preceding blackboard is gone up and wiped bar 2 certain horizontal extruding force is arranged---but be unlikely to influence the push-and-pull displacement of blackboard) is arranged on the last wiping bar 2.The rear lower of blackboard 3 before wiping bar 4 down and being positioned at has the one side of hair side flexible material contact with the one side that back blackboard 1 is used to write (1 pair on back blackboard is wiped bar 4 down certain horizontal extruding force---the push-and-pull that still is unlikely to influence blackboard is shifted) on the following wiping bar 4.

Using method of the present utility model is very convenient: preceding blackboard 3 of push-and-pull or back blackboard 1 displacement form about utilizing can reach the effect of automatic blackboard cleaning by the following wiping bar 4 of upward wiping bar 2 or correspondence of correspondence.

Suppose that last the writing class hour of teacher will account for the four sides blackboard,, need teacher to write a blackboard eraser one side according to present technology, three of minimum wipings, but use this device, do not need to wipe a blackboard.Suppose teacher on preceding blackboard 3, write expired word to change the one side write again, as long as preceding blackboard 3 upwards one is pushed away, because the hair side flexible material on the last wiping bar 2 and the surface of preceding blackboard 3 join, both phase mutual friction in the last process that pushes away, make that going up the hair side flexible material of wiping on the bar 2 wipes the word on preceding blackboard 3 surfaces, simultaneously, because the hair side flexible material on the wiping bar 4 joins with the surface of back blackboard 1 down, both also phase mutual friction in this process, make the hair side flexible material of wiping down on the bar 4 wipe the word on blackboard 1 surface, back, reach the purpose that the utensil of need not be manually taking blackboard eraser one class again just can automatic blackboard cleaning, make teacher on blackboard, write by all means and the problem that needn't consider oneself to erase the board.And, no matter be to write on the preceding blackboard 3 to have expired word and will change back blackboard 1, still write on the blackboard 1 of back expired word to change before blackboard 3, every blackboard that pulls down is owing to always can contact with the wiping bar, reach the purpose of automatic blackboard cleaning, therefore do not need power consumption, be existing electronic erasing the board can't be obtained.

Claims

1, a kind of automatic blackboard cleaning device of adapted type of push and pull up down blackboard, have: the preceding blackboard (3) and the back blackboard (1) that constitute the type of push and pull up down blackboard, it is characterized in that: under the rear lower location of preceding blackboard (3), wipe bar (4), at preceding blackboard (3) when being positioned at uppermost position, last wiping bar (2) just in time is positioned at the preceding bottom of preceding blackboard (3), and, on to wipe bar (2) be to be positioned on the rear side wall of blackboard by the spider affixed with it (5).

2, a kind of automatic blackboard cleaning device of adapted type of push and pull up down blackboard as claimed in claim 1 is characterized in that: described going up on the wiping bar (2) has the one side of hair side flexible material to contact with the one side that preceding blackboard (3) is used to write.

3, a kind of automatic blackboard cleaning device of adapted type of push and pull up down blackboard as claimed in claim 1 is characterized in that: the described one side that the hair side flexible material is arranged on the bar (4) of wiping down contacts with the one side that back blackboard (1) is used to write.