CN201073882Y

CN201073882Y - Blackboard eraser

Info

Publication number: CN201073882Y
Application number: CNU2007200935438U
Authority: CN
Inventors: 谢雪
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-04-13
Filing date: 2007-04-13
Publication date: 2008-06-18
Anticipated expiration: 2017-04-13

Abstract

The utility model relates to a blackboard eraser, which comprises a traction motor, a traction rope and a pulley, sponge erasers, an upper guide rail, and a lower guide rail. The utility model is characterized in that the sponge erasers are divided into a dry eraser and a wet eraser; the two ends of the dry eraser and the wet eraser are pressed by a compression spring in the slide rack through a connecting plate; the slide rack is connected with the traction rope; the middle parts of the dry eraser and the wet eraser are connected by a water expelling clip; a synchronous transmission shaft is connected below the traction motor; the two opposite step surfaces of the dry eraser and the wet eraser are respectively fixed between two water expelling press bars on the slide rack; the slide rack is slidably connected with the upper and lower guide rails; two magnets corresponding to the connecting plate are arranged on the back of the slide rack; a switch rod is arranged on the connecting plate and matched with a switch baffle; a water tank is arranged at the side of the upper slide rack; a water collection box is arranged below the dry eraser and the wet eraser. The utility model solves the problem that the traditional blackboard eraser has chalk dust raising and environmental pollution during use, thereby preventing teachers and students from being invaded by chalk dust. The utility model has the advantages of good erasing effect, time-labor saving and convenience teaching, simple and reasonable structure, and favorableness to popularization.

Description

A kind of blackboard eraser

Technical field:

The utility model relates to the classroom instruction apparatus, especially relates to a kind of blackboard eraser.

Background technology:

At present, the great majority that use on the classroom still are traditional blackboard eraser, not only require great effort when erasing the board, lose time, and the dust of wiping flies upward the severe contamination classroom environment everywhere, bring huge injury for academics and students's physical and mental health, simultaneously, the teacher that thoroughly also do not influence of wiping continues writing on the blackboard.Though document records some electronic blackboard erasers, because its complex structure, use loaded down with trivial details and do not promoted the use of.

Summary of the invention:

Technical problem to be solved in the utility model provides and a kind ofly saves time, the electric blackboard eraser of laborsaving, environmental protection, to overcome the defective that the above-mentioned background technology exists.

The technical solution of the utility model is: comprise traction electric machine, pull rope and pulley, sponge is wiped, upper rail, lower guideway, sponge is wiped and is divided xerotripsis and wet rubbing, xerotripsis and wet rubbing two ends are located in the travelling carriage by connecting plate and by the extruding of compression spring, travelling carriage is connected with pull rope, xerotripsis is connected by the water squeezing folder with the wet rubbing middle part, connect the Synchronous Transmission axle below the traction electric machine, two step surfaces that xerotripsis and wet rubbing are relative are located at respectively between two water squeezing press strips that are fixed on the travelling carriage separately, travelling carriage and last, lower guideway is slidingly connected, the travelling carriage back is corresponding with connecting plate to be provided with two blocks of magnet, connecting plate is provided with selector bar, selector bar cooperates with the conversion block, last travelling carriage side is provided with water tank, is provided with water spilage tray below xerotripsis and wet rubbing.

The utility model comprises xerotripsis and wet rubbing, has solved traditional blackboard and has wiped dust from flying problem of environment pollution caused when using, and has avoided the academics and students to be subjected to the infringement of dust; By selector bar, conversion block and magnet xerotripsis and wet rubbing are used alternatingly, wipe effectively, time saving and energy saving, provide convenience to teaching, simple and reasonable, be convenient to promote the use of.

Description of drawings:

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

Fig. 2 is the left view of Fig. 1;

Fig. 3 is the vertical view of Fig. 1;

Fig. 4 is the cutaway view along A-A line among Fig. 1.

With reference to Fig. 1,2,3,4, the utility model comprises traction electric machine 15, pull rope 3 and pulley 2, sponge is wiped, on, lower guideway 1, sponge is wiped and is divided xerotripsis 6 and wet rubbing 11, xerotripsis 6 and wet rubbing 11 two ends are located in the travelling carriage 4 by connecting plate 5 and by 18 extruding of compression spring, travelling carriage 4 is connected with pull rope 3, xerotripsis 6 is connected by water squeezing folder 9 with wet rubbing 11 middle parts, connect Synchronous Transmission axle 14 below the traction electric machine 15, two step surfaces that xerotripsis and wet rubbing are relative are located at respectively between two water squeezing press strips 10 that are fixed on the travelling carriage separately, connecting plate 5 is located in the travelling carriage 4 by 18 extruding of compression spring, travelling carriage and last, lower guideway is slidingly connected, the travelling carriage back is corresponding with connecting plate to be provided with two blocks of magnet 7, connecting plate is provided with selector bar 17, selector bar 17 cooperates with conversion block 13, top travelling carriage side is provided with water tank 8, is provided with water spilage tray 16 below xerotripsis and wet rubbing.

During use, utilize the magnetic attraction of magnet, by water tank the sponge on the right is wiped and become wet rubbing, press wet rubbing, make it to contact then xerotripsis perk with blackboard 12, press motor switch, motor is just changeed, pull rope drives wet rubbing by travelling carriage and connecting plate and xerotripsis moves right, at this moment, wet rubbing work slides into right-hand member up to wet rubbing, when the conversion block is run into selector bar, make the wet rubbing perk, xerotripsis contact blackboard; The motor counter-rotating, wet rubbing and xerotripsis are moved to the left, and a work period is promptly finished in xerotripsis work, the addle in wet rubbing and the xerotripsis can be extruded by water squeezing folder and water squeezing press strip, in the water spilage tray below the addle of extruding flows into, and so forth, just can blackboard eraser is clean.

Claims

1. blackboard eraser, comprise traction electric machine, pull rope and pulley, sponge is wiped, upper rail, lower guideway, it is characterized in that: sponge is wiped and is divided xerotripsis and wet rubbing, xerotripsis and wet rubbing two ends are located in the travelling carriage by connecting plate and by the extruding of compression spring, travelling carriage is connected with pull rope, xerotripsis is connected by the water squeezing folder with the wet rubbing middle part, connect the Synchronous Transmission axle below the traction electric machine, two step surfaces that xerotripsis and wet rubbing are relative are located at respectively between two water squeezing press strips that are fixed on the travelling carriage separately, travelling carriage and last, lower guideway is slidingly connected, the travelling carriage back is corresponding with connecting plate to be provided with two blocks of magnet, connecting plate is provided with selector bar, selector bar cooperates with the conversion block, and last travelling carriage side is provided with water tank, is provided with water spilage tray below xerotripsis and wet rubbing.