CN103552409B - Water type self-cleaning mark removing blackboard eraser - Google Patents

Abstract

The invention provides a water-type self-cleaning eraser, which includes an eraser shell, a water box, a rubber cotton ring pad, a flexible transmission shaft, a driven shaft, a soft support shaft, a sponge water-absorbing column, and a dropper. The upper part is embedded with a water box, and the upper part of the eraser shell below the central axis of the water box is equipped with a dropper through bearings on both sides. The two sides of the dropper communicate with the water in the water box through water pipes. A pair of driven shafts are installed on the eraser housing, and a pair of flexible transmission shafts are installed at the lower end of the eraser housing. The two flexible transmission shafts are coaxially covered with a collodion ferrule, and a soft transmission shaft is installed between the two flexible transmission shafts. Quality support shaft, on flexible transmission shaft, soft support shaft, driven shaft and sponge water absorption post, co-wind a collodion ring pad, and this collodion ring pad exposes the lower end surface of the eraser shell. The overall structure of this eraser is reasonable, and the design is scientific and ingenious, which perfectly overcomes the problems existing in the existing eraser.

Description

A water-type self-cleaning eraser

technical field

The invention belongs to the field of cultural and educational supplies, and relates to a blackboard eraser, in particular to a water-type self-cleaning eraser.

Background technique

In modern teaching, although projectors have been widely used, blackboards and chalk are still important tools in teaching, and still have an irreplaceable position in the classroom. When removing the chalk writing on the blackboard, the common eraser with bristles is traditionally mainly used. This common eraser will cause chalk dust to fly in the classroom during use, and not only the desks, hair and clothes are stained. A layer of white powder also emits a special smell, which can easily cause diseases such as chronic pharyngitis, which has brought great harm to the health of teachers and students.

In order to solve the above-mentioned problems of the bristle-type common blackboard eraser, the prior art has adopted many ways to make the blackboard clean, and the specific methods are various, but there are many shortcomings in these methods, such as high energy consumption, heavy, inconvenient use or poor dust removal effect Good and so on. Therefore, there is still a need for an eraser product with good environmental protection effect, convenient use, small size and low cost.

Contents of the invention

The object of the present invention is to overcome the disadvantages of the prior art, and provide a water-type self-cleaning scratch-removing eraser with good environmental protection effect, convenient use, small size and low cost.

The technical scheme that the present invention realizes purpose is:

A water-type self-cleaning scratch-removing board eraser, including a board eraser shell, a water box, a rubber cotton ring pad, a flexible transmission shaft, a driven shaft, a soft support shaft, a sponge water-absorbing column, and a dropper, embedded in the upper part of a square eraser shell Water box, the upper part of the eraser shell below the central axis of the water box is equipped with a dropper through the bearings on both sides. The two sides of the dropper are connected with the water in the water box through the water pipe. There are water outlets evenly distributed on the wall of the dropper; a pair of horizontally symmetrical driven shafts are installed on the eraser shell on both sides of the dropper through bearings, and the lower end of the eraser shell below the driven shaft passes through The bearing is equipped with a pair of laterally symmetrical flexible transmission shafts, and a collodion ferrule is coaxially overlaid on the two flexible transmission shafts, and a soft support shaft is installed between the two flexible transmission shafts on the same plane. The shaft also has a coaxial overcoat with a collodion ferrule, and a collodion ring pad is wound together on the flexible transmission shaft, the soft support shaft, the driven shaft and the sponge water absorption column, and the collodion ring pad exposes the lower end surface of the eraser shell.

Moreover, a mud-scraping box is symmetrically embedded on both sides of the eraser shell. The mud-scraping box is formed with a dirt-scraping plate facing the rubber cotton ring pad. The mud-scraping box is also embedded with an embedded cover. The cover can pour out the chalk plaster in the scraper box.

Moreover, the water outlets uniformly distributed on the wall of the dropper are tapered, and the water outlets are flared facing the direction of the sponge water absorption column.

Advantage and positive effect of the present invention are:

1. This board eraser adopts the rubber cotton ring pad as the wiping tool for chalk dust, and utilizes the characteristics of large gaps and high water absorption of the rubber cotton ring pad, so that the chalk dust can be dissolved in the water of the rubber cotton ring pad to absorb dust, avoiding chalk dust Feiyang is harmful to the health of teachers and students, has strong practicability, low cost, simple operation, and is convenient for popularization.

2. The eraser uses a dropper as the water injection source for the rubber cotton ring pad, and the dropper adopts a tapered mouth, which has a large contact area with the sponge water absorption column, which can maintain a saturated state and ensure the wiping effect of the eraser.

3. This eraser is also equipped with two scraping boards on both sides of the collodion ring pad, which can hang the chalk plaster adsorbed on the outer surface of the collodion ring pad and send it into the scraper box, ensuring that the collodion ring pad The self-cleaning of the pad improves the service life of the collodion ring pad.

4. The transmission on both sides of the rubber cotton ring pad of this eraser adopts soft ferrules, and a soft support shaft is also set in the middle part. The upper part is pressed down and filled with water by a sponge water-absorbing column. Both ends of all transmission shafts use bearings. While ensuring the smooth and fast operation of the entire transmission system, it can also effectively ensure the water content of the board eraser and a certain downforce buffer when wiping the blackboard, forming a flexible transmission system, which greatly improves the wiping ability and effect of the board eraser.

5. The overall structure of this eraser is reasonable, and the design is scientific and ingenious, which perfectly overcomes the problems existing in the existing eraser. It is a replacement product of the existing eraser, which is more competitive and has a broad market prospect than similar products.

Description of drawings

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

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

Fig. 3 is the A-A direction sectional view of Fig. 2;

Fig. 4 is the left view of Fig. 1;

Fig. 5 is a schematic diagram of the connection structure between the water box of the present invention, the sponge water absorption column and the dropper;

FIG. 6 is an enlarged schematic diagram of the structure of part B in FIG. 5 .

Detailed ways

Specific embodiments of the present invention are described below in conjunction with accompanying drawings; It should be noted that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made. And retouching should also be regarded as the protection scope of the present invention.

A water-type self-cleaning scratch-removing eraser, comprising an eraser shell 1, a water box 3, a rubber cotton ring pad 9, a flexible transmission shaft 8, a driven shaft 2, a soft support shaft 10, a sponge water-absorbing column 13, a dropper 4 and Mud scraping box 7 is embedded with a water box on the top of the square eraser shell. The water box is in the form of a cone and is provided with a water inlet cover 5 on the top of the water box. Button mouth 11, so that the water box is taken out from the eraser shell; The upper part of the eraser shell below the central axis of the water box is equipped with a dropper through bearings 18 on both sides, and the two sides of the dropper pass through the water pipe 17 and the water box. The inner water 12 is connected, and the coaxial sleeve of the dropper is equipped with a sponge water-absorbing column, and the water outlet 19 with a tapered mouth is evenly distributed on the wall of the dropper, and the water outlet is flared facing the direction of the sponge water-absorbing column, thus The sponge water absorption column can be kept in a saturated state at any time. A pair of laterally symmetrical driven shafts are installed through bearings on the eraser housings on both sides of the dropper, and a pair of laterally symmetrical flexible transmission shafts are installed through bearings at the lower end of the eraser housing obliquely below the driven shafts. There is a collodion ferrule 15 in the coaxial overlay of the transmission shaft, and a soft support shaft is also installed on the same plane between the two flexible transmission shafts. The shaft, the soft supporting shaft, the driven shaft and the sponge water-absorbing column are wound together with a collodion ring pad, and the collodion ring pad exposes the lower end surface of the eraser shell.

A mud-scraping box is symmetrically embedded on both sides of the eraser shell, and a dirt-scraping plate 14 is formed on the mud-scraping box facing the collodion ring pad, which can remove the chalk dust adsorbed by the collodion ring pad The mud is scraped off and flows into the mud scraping box, which is also embedded with an embedded cover 6, through which the chalk plaster in the mud scraping box can be poured out.

Claims (3)

1. an ability of swimming automatically cleaning is except trace blackboard eraser, it is characterized in that: comprise blackboard eraser shell, water box, collodion ring pad, flexible drive axle, driven shaft, soft support axle, sponge sucks in water post, dropper, at the top setting-in water box of square blackboard eraser shell, blackboard eraser shell internal upper part below water box axis position is provided with dropper by the bearing of both sides, the both sides of this dropper are communicated with the water in water box by water pipe, the outer coaxial sleeve of dropper is equipped with that sponge sucks in water post, on dropper wall, uniform interval is shaped with delivery port, the blackboard eraser shell of dropper both sides is provided with by bearing the driven shaft of a pair lateral symmetry, in the blackboard eraser shell of the oblique below of driven shaft, position, bottom is provided with the flexible drive axle of a pair lateral symmetry by bearing, these two flexible drive axles have a collodion lasso with outer shaft sleeve, between two flexible drive axles a soft support axle is also installed at grade, this soft support axle also has a collodion lasso with outer shaft sleeve, at flexible drive axle, soft support axle, jointly on driven shaft and sponge sucks in water post be wound around a collodion ring pad, this collodion ring pad exposes the lower surface of blackboard eraser shell.

2. ability of swimming automatically cleaning according to claim 1 is except trace blackboard eraser, it is characterized in that: be embedded with one in each symmetry of the two side ends of blackboard eraser shell and scrape mud box, this is scraped mud box and is being shaped with a dirt-scraping plate in the face of collodion ring pad position, this is scraped mud box and is also embedded with a setting-in lid, the chalk plaster scraped in mud box can be poured out by setting-in lid.

3. ability of swimming automatically cleaning according to claim 1 is except trace blackboard eraser, it is characterized in that: the described delivery port that uniform interval is shaped with on dropper wall is bell, and in the face of sponge sucks in water, post direction is enlarging to this delivery port.