CN215904215U - Quick-dry dustless blackboard eraser - Google Patents

Abstract

The utility model discloses a quick-drying dust-free blackboard eraser which is used for quickly and cleanly erasing a blackboard. The blackboard eraser comprises a shell and a wiping compound body. The casing be through the rectangle casing of design, casing one side is the cambered surface, there is a cambered surface columniform body side, the complex body of wiping of telling includes the sponge and scrapes the water strip, all prolongs casing length direction and places, the sponge is isometric with the casing, and inside has a cylindrical rectangular thing, scrapes the water strip and is located between sponge and the cambered surface columniform body. When the blackboard eraser is used, the sponge is soaked, then the blackboard eraser is held by hands and placed on the surface of a blackboard, one side of the sponge faces downwards, and the blackboard eraser is lifted integrally. When in wiping, the chalk is dragged downwards by force towards the sponge end, thereby removing the chalk characters. When the blackboard eraser is dragged downwards, the water scraping strip is stressed to be drawn close to the cambered columnar body to form a water scraping system, water on the blackboard is scraped, the integrated treatment of wiping and removing water is realized, and the effect of wiping the blackboard is achieved.

Description

Quick-dry dustless blackboard eraser

Technical Field

The utility model relates to the technical field of blackboard erasers, in particular to a quick-drying dust-free blackboard eraser.

Background

The blackboard eraser is a commonly used teaching aid and is commonly used in various schools. Traditional dry-type blackboard eraser has the chalk to pile up on the surface after wiping many times, leads to the blackboard of wiping to have the chalk dust to remain, influences student's experience of going to class, and has a large amount of chalk dust to get into in the air influence teachers and students health wiping the in-process. The existing wet sponge eraser absorbs a large amount of chalk dust by the liquid remained in the existing wet sponge eraser after being erased for a period of time, the chalk dust can be left on the blackboard along with water in the erasing process, and the use of teachers and students is influenced due to the fact that the water evaporates and the chalk dust remains on the blackboard. In addition, in the rainy season in the south, the wiping effect of the dry type blackboard eraser and the wet type blackboard eraser is reduced, the dry type blackboard eraser can leave chalk dust on the blackboard due to the increase of humidity, and the wet type blackboard eraser can cause the surface of the blackboard to be too wet, so that newly written writing on the blackboard is soaked by water, and students cannot see the writing clearly. Therefore, a new blackboard eraser is urgently needed to solve the above problems.

Disclosure of Invention

In order to solve the problems, the utility model provides a quick-drying dust-free blackboard eraser.

The quick-drying dust-free blackboard eraser comprises a shell and an erasing complex, and is characterized in that: the casing be through the cuboid of design, casing one side is the cambered surface, there is a cambered surface column body side, the complex body is cleaned including the sponge of telling and the strip of wiping, all prolong casing length direction and place, the sponge is isometric with the casing, and inside has a cylindrical rectangular thing, the strip of wiping is located between sponge and the cambered surface column body.

Preferably, the two ends of the wiper strip are provided with two small circular arc-shaped protrusions, and the distance between the two small circular arc-shaped protrusions is larger than the length of the sponge but smaller than the length of the wiper strip.

Preferably, the arc-shaped cylindrical body on one side of the shell is connected with the shell through reinforcing ribs, and the tail parts of the reinforcing ribs on the front side and the rear side are provided with arc-shaped protrusions.

Preferably, the sponge has a cylindrical body inside, one long edge of which is passivated, and the passivated side faces away from the wiper strip.

Preferably, the length of the wiper strip is longer than that of the sponge but smaller than that of the cambered columnar body.

The beneficial technical effects of the utility model patent are as follows:

the blackboard eraser comprises a shell, a wiping compound body, a water scraping strip, a sponge and a columnar object, wherein the shell is a designed rectangular shell, one side of the shell is an arc surface, the side surface of the shell is provided with an arc surface columnar object, the wiping compound body comprises the sponge and the water scraping strip which are arranged along the length direction of the shell, the sponge and the shell are equal in length, the columnar object is arranged in the sponge, and the water scraping strip is positioned between the sponge and the arc surface columnar object. The scraping strip behind the sponge and the plastic cylinder on the shell are combined to form a scraping system to scrape the redundant water on the blackboard.

Drawings

Fig. 1 is a schematic perspective view of a quick-drying dust-free blackboard eraser.

Fig. 2 is a front view of the wiper strip.

Fig. 3 is a right side view of the wiper strip.

In the figure, 1, sponge, 2, scraping strips, 3, arc-surface cylindrical bodies, 4, reinforcing ribs, 5, a shell and 6, reinforcing columns are arranged in the sponge. 7. The arc small bulges at the two ends of the water scraping strip.

Detailed Description

Embodiment one, referring to fig. 1, a high-wiping-efficiency dust-free blackboard eraser includes a housing and a wiping composite:

the casing be through the rectangle casing of design, casing one side is the cambered surface, clean the complex body and include the sponge and scrape the water strip, all prolong casing length direction and place, the sponge is isometric with the casing, and there is a column rectangular thing in inside, scrape the water strip and be located sponge and cambered surface

Between the columns.

The two ends of the water scraping strip are provided with two arc-shaped small bulges, the distance between the two small bulges is larger than the length of the sponge but smaller than the length of the water scraping strip, and the two small bulges can guide water to flow downwards to prevent the water from polluting the wiped blackboard.

The cambered surface columnar body on one side of the shell is connected with the shell through the reinforcing ribs, the tail parts of the reinforcing ribs on the front side and the rear side are provided with the circular arc protrusions, the reinforcing ribs can enhance the connection strength of the cambered surface columnar body and the shell, the service life is prolonged, and the circular arc protrusions on the tail parts can support the blackboard eraser to stand up and are convenient to take.

The sponge is internally provided with a cylindrical body, one long edge of the cylindrical body is passivated, and the passivated side deviates from the water scraping strip, so that the friction force of the sponge on the blackboard can be increased, and the efficiency is improved.

The length of the water scraping strip is longer than that of the sponge but smaller than that of the arc-surface columnar body, so that water released by the sponge can be completely removed by the water scraping strip.

The use process and principle of the utility model;

after being soaked by the sponge, the blackboard eraser is held by hand and placed on the surface of a blackboard, one side of the sponge faces downwards, and the blackboard eraser is lifted integrally. When the chalk is wiped, the sponge end is dragged downwards with force, so that chalk characters are removed. The wiping strip is forced to approach the cambered columnar body while being dragged downwards to form a wiping system for wiping water on the blackboard.

The concave-convex shape of the sponge can increase the friction force in the wiping process of the internal cylindrical body so as to increase the cleaning capability of the blackboard, so that chalk dust can be removed more easily, and the damage of the blackboard eraser to the blackboard can be reduced due to the arc design of the internal cylindrical body. The water scraping strip is made of rubber, the length of the water scraping strip is longer than that of the sponge, so that water released by the sponge can be completely scraped, and the protrusions at the two ends can prevent water from diffusing to the two sides to pollute a cleaned blackboard in the water scraping process and help sewage to flow downwards. The part that the columnar body is linked with the casing has the strengthening rib, can consolidate the linking of columnar body and casing, increases life, and the strengthening rib at both ends can form the support with the columnar body through special design and support, makes things convenient for the mr to take. The arc-shaped design of the columnar body can be tangent to the blackboard at any angle, so that the wiping effect is ensured.

Claims (5)

1. A quick-dry dustless blackboard eraser comprises a shell and an erasing complex, and is characterized in that:

the casing be the rectangle casing through the design, casing one side is the cambered surface, and there is a cambered surface columniform body side, clean the complex body and include the sponge and scrape the water strip, all prolong casing length direction and place, the sponge is isometric with the casing, and inside has a cylindrical rectangular thing, scrapes the water strip and is located between sponge and the cambered surface columniform body.

2. The blackboard eraser with quick drying and no dust as claimed in claim 1, wherein the wiper strip has two small circular arc-shaped protrusions at both ends, and the distance between the two small protrusions is greater than that of the sponge but less than the length of the wiper strip.

3. The blackboard eraser with quick drying and no dust as claimed in claim 1, wherein the arc cylinder at one side of the casing is connected with the casing by a reinforcing rib, and the tail parts of the reinforcing ribs at the front and rear sides are provided with arc-shaped protrusions.

4. The blackboard eraser with quick drying and no dust as claimed in claim 1, wherein the sponge has a cylindrical body inside, one long edge of which is passivated, and the passivated side is away from the wiper strip.

5. The blackboard eraser with quick drying and no dust as claimed in claim 1, wherein the length of the wiping strip is longer than that of the sponge but smaller than that of the cambered columnar body.

Images