CN203580450U - Water type self-cleaning mark-removing eraser - Google Patents

Abstract

The utility model provides a water-type self-cleaning eraser, which comprises 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 of the water box 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 the bearings on both sides. The two sides of the dropper communicate with the water in the water box through the water pipe. 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 pair of flexible transmission shafts is installed between the two flexible transmission shafts. Soft supporting shaft, on flexible transmission shaft, soft supporting shaft, driven shaft and sponge water absorption post, co-wrap 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 utility model 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.

Utility model content

The purpose of the utility model is to overcome the deficiencies 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 utility model 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 utility model 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 the structural front view of the present utility model;

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 of 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 utility model are described below in conjunction with the accompanying drawings; it should be noted that for those of ordinary skill in the art, some improvements and modifications can also be made without departing from the principle of the utility model. These improvements and modifications should also be regarded as the protection scope of the present utility model.

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. A water-type self-cleaning board eraser, characterized in that: it includes 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. The upper part of the eraser shell 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. The coaxial set is equipped with a sponge water-absorbing column, and water outlets are uniformly distributed on the wall of the dropper; a pair of horizontally symmetrical driven shafts are installed on the eraser shells on both sides of the dropper through bearings, and the eraser below the driven shaft is inclined. A pair of horizontally symmetrical flexible transmission shafts are installed at the lower end of the housing through bearings. A collodion ferrule is coaxially overlaid on the two flexible transmission shafts, and a soft support is installed between the two flexible transmission shafts on the same plane. Shaft, the soft support shaft is also coaxially covered with a rubber cotton ferrule, and a rubber cotton ring pad is wound on the flexible transmission shaft, soft support shaft, driven shaft and sponge water absorption column, and the rubber cotton ring pad is exposed from the eraser shell the lower end face. 2. The water-type self-cleaning scratch-removing eraser according to claim 1, characterized in that: a mud-scraping box is symmetrically embedded on both sides of the eraser shell, and the mud-scraping box is made at the position facing the rubber cotton ring pad. There is a dirt scraping board, and an embedded cover is embedded in the mud scraping box, through which the chalk plaster in the mud scraping box can be poured out. 3. The water-type self-cleaning scratch-removing eraser according to claim 1, characterized in that: the water outlets uniformly distributed and spaced on the wall of the dropper are tapered mouths, and the water outlets face the direction of the sponge water absorption column For flaring.

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