CN220031576U - Blackboard eraser convenient to remove dust - Google Patents

Abstract

The utility model relates to the technical field of stationery, and particularly discloses a convenient dust-removing blackboard eraser which comprises a wiping piece, an inner body and a shell; the wiping piece is connected with the inner body, the inner body is connected with the outer shell, the wiping piece and the outer shell are oppositely arranged at two sides of the inner body, and two bending plates are arranged between the inner body and the outer shell; the two bending plates are oppositely arranged, a first gap is reserved between the two bending plates, the two bending plates are connected and fixed with the wall surface of the shell, and the two bending plates are bent towards the inner bottom surface of the shell; a third gap is reserved between the two bending plates and the inner body, a second gap is reserved between the two bending plates and the outer shell, the third gap is communicated with the second gap through the first gap, the third gap is used for air intake, and the second gap is used for accommodating dust; through the arrangement of the two bending plates between the outer shell and the inner body, negative pressure suction is generated between the inner part and the outer part when the blackboard eraser is used for wiping, dust is sucked into the second gap, and the dust of the blackboard is absorbed and collected under the condition that electricity is not required.

Description

Blackboard eraser convenient to remove dust

Technical Field

The utility model relates to the technical field of stationery, in particular to a convenient dust-removing blackboard eraser.

Background

The chalk and the blackboard eraser are still inseparable tools in daily teaching activities, the blackboard eraser is used as a necessary consumption article for classrooms, the demand is huge, dust flying is easily caused in the using process of the traditional blackboard eraser, more dust on the blackboard eraser is accumulated along with time, the blackboard eraser is difficult to clean, and the using period of the blackboard eraser is short. Meanwhile, dust inhalation of staff in a larger range can be caused in the processes of wiping the blackboard and knocking the cleaning blackboard eraser, so that great influence is caused on the health of teachers and students.

In recent years, scientific and technological workers in China have made more researches on traditional blackboards, blackboard erasers and chalks, have made many improvements aiming at existing problems, and have simultaneously put forward a plurality of ideas and designs, such as dust-free chalks, dust-free blackboards and electric blackboard erasers. The blackboard eraser can be divided into electricity consumption type and electricity unnecessary type according to the product structure of the blackboard eraser. The common blackboard eraser without electricity is a traditional cotton cloth, sponge and felt blackboard eraser. Common electricity-consuming types include electric blackboard eraser, full-automatic blackboard eraser and creative blackboard eraser. The electric blackboard eraser has small volume, simple operation and good dust reducing effect, but needs to be charged or replaced frequently. The full-automatic blackboard eraser can be used for full coverage and automatic erasing, but has large volume, weaker compatibility and high cost. The existing electrostatic dust-free blackboard eraser, water-soluble dust-free blackboard eraser and dust-free blackboard eraser have the same advantages of good dust-settling effect, dust-collecting function and good cleaning effect, and have the defects of requiring additional matched equipment for use and troublesome daily maintenance. Through research on various products, the reasons that the existing innovative blackboard eraser cannot be popularized are mainly as follows: the cost is high, the use is inconvenient, the environment is not protected, the service life is short, the daily maintenance is troublesome and the like, which are all problems existing in the innovation of the blackboard eraser industry, so that the traditional blackboard eraser without electricity is still the most widely applied type at present.

However, when the conventional electric blackboard eraser is used for erasing blackboard dust, the problem that the blackboard dust cannot be absorbed and collected exists, and the problem is particularly characterized in that the blackboard dust can fly away along with the erasing, and the dust accumulated on the blackboard eraser can fly away along with the erasing action along with the accumulation of the erasing time of the blackboard eraser, but the flying dust can pollute the teaching environment and endanger the health of users.

Therefore, the research on the blackboard eraser which can collect blackboard dust and does not need electricity has practical value.

Disclosure of Invention

The utility model aims to provide a convenient dust-removing blackboard eraser, which solves the problem that the existing electric blackboard eraser is not required to absorb and collect blackboard dust.

In order to solve the technical problems, the utility model provides a convenient dust-removing blackboard eraser which comprises a wiping piece, an inner body and a shell; the wiping piece is connected with the inner body, the inner body is connected with the outer shell, the wiping piece and the outer shell are oppositely arranged at two sides of the inner body, and two bending plates are arranged between the inner body and the outer shell; the two bending plates are oppositely arranged, a first gap is reserved between the two bending plates, the two bending plates are connected and fixed with the wall surface of the shell, and the two bending plates are bent towards the inner bottom surface of the shell; the two bending plates and the outer shell are respectively provided with a second gap, the two bending plates and the inner body are respectively provided with a third gap, the third gaps are communicated with the second gaps through the first gaps, the third gaps are used for air intake, and the second gaps are used for accommodating dust.

In one embodiment, the opening of the second gap adjacent to the first gap is larger than the opening of the second gap remote from the first gap.

In one embodiment, the second gap is an arcuate space.

In one embodiment, the outer curved surfaces of the two curved plates are arc-shaped structures, and the outer shell is arc-shaped structures.

In one embodiment, the opening of the third gap away from the first gap is larger than the opening of the third gap adjacent to the first gap.

In one embodiment, the third gap is an arc-shaped space.

In one embodiment, the inner curved surfaces of the two curved plates are arc-shaped structures, and the wall surfaces of the inner body are arc-shaped structures.

In one embodiment, a plurality of dust escape prevention grooves are formed in each of the two curved plates.

In one embodiment, the inner body is detachably and fixedly connected with the outer shell; one end of the shell is connected with a first connecting plate, a protrusion is arranged on the wall surface of the first connecting plate adjacent to the bottom of the inner body, and the protrusion is used for supporting one end of the inner body; the inner wall of the other end of the shell is provided with a connecting groove, the other end of the inner body is provided with a second connecting plate, and the second connecting plate is clamped in the connecting groove.

In one embodiment, the wiper is removably secured to the inner body.

The beneficial effects of the utility model are as follows:

because the inner body and the shell are provided with two bending plates, the two bending plates are oppositely arranged, a first gap is reserved between the two bending plates, the two bending plates are connected and fixed with the wall surface of the shell, the two bending plates are bent towards the inner bottom surface of the shell, a third gap is reserved between the two bending plates and the inner body, a second gap is reserved between the two bending plates and the shell, the third gap is communicated with the second gap through the first gap, and therefore, when the blackboard eraser is applied, the two bending plates and the inner body form a third gap, and the bending plates are of a bent structure.

In summary, through the arrangement of the two curved plates between the outer shell and the inner body, negative pressure suction is generated between the inner part and the outer part when the blackboard eraser is wiped, dust is sucked into the second gap, and the dust of the blackboard is absorbed and collected under the condition that electricity is not required.

Drawings

In order to more clearly illustrate the technical solutions of the present utility model, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the overall cross-sectional structure provided by the preferred embodiment of the present utility model;

FIG. 2 is a schematic view of the overall structure provided by the preferred embodiment of the present utility model;

FIG. 3 is a schematic diagram showing the overall structure of a second preferred embodiment of the present utility model;

FIG. 4 is a schematic elevational view of the overall structure provided by the preferred embodiment of the present utility model;

FIG. 5 is a side schematic view of the overall structure provided by the preferred embodiment of the present utility model;

FIG. 6 is a schematic elevational view of the housing and curved plate provided in accordance with the preferred embodiment of the present utility model;

FIG. 7 is a schematic view of the structure of the housing and curved plate provided by the preferred embodiment of the present utility model;

FIG. 8 is a schematic view of the structure of an inner body provided in a preferred embodiment of the present utility model;

fig. 9 is a schematic diagram of an overall simulation provided by the preferred embodiment of the present utility model.

The reference numerals are as follows:

1. a wiper; 2. an inner body; 20. a second connecting plate; 3. a housing; 30. a first connection plate; 31. a grip rib; 4. bending the plate; 40. a dust escaping prevention groove; 5. a first gap; 6. a second gap; 7. and a third gap.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

In the prior art, two main defects of an electric blackboard eraser are not needed; firstly, dust on a blackboard during wiping cannot be collected, so that the dust flies; secondly, the problem that the blackboard eraser is difficult to detach when being cleaned, and the problem that secondary dust is easily caused by cleaning modes such as flapping is often used.

In order to solve the above problems, the present utility model provides a convenient dust-removing blackboard eraser, the preferred embodiment of which is shown in fig. 1 to 9, comprising a wiper 1, an inner body 2 and a housing 3; the wiper 1 is connected with the inner body 2, the inner body 2 is connected with the outer shell 3, the wiper 1 and the outer shell 3 are oppositely arranged at two sides of the inner body 2, and two bending plates 4 are arranged between the inner body 2 and the outer shell 3; the two bending plates 4 are oppositely arranged, a first gap 5 is reserved between the two bending plates 4, the two bending plates 4 are fixedly connected with the wall surface of the shell 3, and the two bending plates 4 are bent towards the inner bottom surface of the shell 3; a third gap 7 is reserved between the two bending plates 4 and the inner body 2, a second gap 6 is reserved between the two bending plates 4 and the outer shell 3, the third gap 7 is communicated with the second gap 6 through the first gap 5, the third gap 7 is used for air intake, and the second gap 6 is used for accommodating dust.

The air flows into the first gap at a high speed in the third gap, enters the second gap through the first gap, forms an air pressure difference between the inside and the outside in the process, and attracts dust in a negative pressure mode, specifically, as shown in negative pressure simulation of fig. 9, light color indicates that the air flow rate is high, dark color indicates that the air flow rate is low, and it is clear from the illustration that the air flow rate in the third gap is high and is obviously higher than the air flow rate outside the blackboard eraser, the air flow rate of the inside is high and the air flow rate of the outside is low, the air flow rate of the outside is low and the air flow rate of the outside is high, so that dust is pressed into the blackboard eraser, and negative pressure attraction is formed.

When the blackboard eraser is applied, when the blackboard eraser is required to absorb dust, the air flows in the blackboard eraser along with the wiping action through the third gap 7 formed by the inner body 2 and the bent plate 4, the surface layer of the blackboard eraser generates air to flow out so as to form negative atmospheric pressure in the blackboard eraser and generate pressure difference with external air pressure, namely, the pressure difference generated by the air flow can generate suction force to drive ambient air to form air flow flowing in the blackboard eraser when the blackboard eraser is applied, the air flow can effectively bring dust into the second gap 6 in the blackboard eraser through the third gap 7, the second gaps 6 at two sides can effectively intercept the dust entering the blackboard eraser and keep the dust in a groove, and the dust is prevented from flying upwards as intended, so that the dust flying when the blackboard eraser is reduced is achieved; after the blackboard is wiped, the inner body 2 and the outer shell 3 are disassembled, collected dust is poured or washed by water, and the wiper 1 is simply washed or flapped, so that the cleaning effect can be achieved.

With respect to the above-mentioned outer casing 3, the inner body 2 is connected to the outer casing 3, the outer casing 3 is half-wrapped outside the inner body 2, the outer casing 3 is arc-shaped in cross section in the width direction, two bending plates 4 can be matched to form a second gap 6, a plurality of holding ribs 31 are further arranged on the outer casing 3, the plurality of holding ribs 31 are oppositely arranged on two sides of the outer casing 3, and through such arrangement, mainly according to ergonomics, the outer casing 3 is designed in an arc shape, and the holding ribs are added, so that the outer casing 3 is good in use feel, comfortable in use, high in modeling plasticity and good in compatibility.

It should be noted that the specific number of the holding ribs 31 is preferably two, and those skilled in the art can select the holding ribs according to their own actual needs.

When the blackboard eraser is applied, a user can directly hold the holding ribs on the shell 3 and can comfortably move the blackboard eraser to wipe.

For the second gap 6, please refer to fig. 1, the housing 3 and the two curved plates 4 cooperate to form the second gap 6, the opening of the second gap 6 adjacent to the first gap 5 is larger than the opening of the second gap 6 away from the first gap 5, and by this arrangement, the airflow is further accelerated through the third gap 7, so that the dust in the airflow is driven into the third gap 7 and collected on the curved plates 4.

When the dust collector is applied, the air flow penetrating out of the third gap 7 enters the second gap 6, and due to the narrowing structural design of the second gap 6, the air flow is driven to fully enter the narrowing position of the second gap 6, so that dust can be collected better.

With respect to the two curved plates 4, as shown in fig. 1, 6 and 7, the two curved plates 4 are both in a C-shaped curved structure, and through such a structural arrangement, during the wiping process of the blackboard eraser, each wiping movement can drive ambient air to circulate into the third gap 7, and the air flow accelerates through the C-shaped curved surface of the curved plate 4, so as to generate a pressure difference to generate an external suction force, and during the use process, the pressure in the blackboard eraser is smaller than the external pressure, thereby forming a negative pressure effect.

Further, in order to achieve the function of accommodating blackboard dust, as shown in fig. 1, 6 and 7, the two curved plates 4 are provided with a plurality of dust escape prevention grooves 40, dust can be retained in the dust collection surface of the dust escape prevention grooves 40, the dust escape prevention grooves 40 are arranged on one surface of the curved plates 4 adjacent to the shell 3, the dust escape prevention grooves 40 are arranged along the length direction of the curved plates 4, the dust escape prevention grooves 40 are arranged along the arc-shaped array of the axes of the curved plates 4, namely, the distances between the adjacent dust escape prevention grooves 40 are the same, by the arrangement, the dust escape prevention grooves 40 can effectively intercept the dust entering the blackboard eraser and retain in the grooves, and the dust is stored in the dust storage cavity, so that dust is finally prevented from flying up, and the purpose of dust flying during blackboard erasing is achieved.

Referring to fig. 1, referring to the third gap 7, the two curved plates 4 and the inner body 2 cooperate to form the third gap 7, the opening of the third gap 7 away from the first gap 5 is larger than the opening of the third gap 7 adjacent to the first gap 5, by such arrangement, the air inlet of the third gap 7 is larger than the air outlet, the air flow is accelerated through the third gap 7, the air flow speed is increased, the air pressure is reduced, and the air pressure difference is formed between the inside and the outside of the blackboard eraser, so that the dust negative pressure is sucked.

Specifically, the third gap 7 is an arc space, the structure forming the third gap 7 includes two curved plates 4 and an inner body 2, the outer curved surfaces of the two curved plates 4 face the inner bottom surface of the outer shell 3, the inner curved surfaces of the two curved plates 4 face the inner bottom surface of the inner body 2, an umbrella-like structure is formed in section, the upper wall surface of the inner body 2 is an arc-like outer curved structure, namely, the upper part of the third gap 7 is provided with the two curved plates 4 which are bent inwards, the lower part of the third gap 7 is provided with the inner body 2 which is bent outwards, the two curved plates 4 form the third gap 7 with an arc space in cooperation with the inner body 2, and by the arrangement, the air flowing through the third gap 7 can be fully contacted with the curved surfaces and accelerated by combining the arc space design of the third gap 7 with the narrowing structure.

Further, in order to achieve the purpose of keeping the air flowing orderly when entering the third gap 7, as shown in fig. 1, the cambered surfaces of the two bending plates 4 and the outer shell 3 are excessive, so that the connection part between the two bending plates 4 and the outer shell 3 is arc-shaped excessively.

When the novel blackboard eraser is applied, air accelerates in the third gap 7, so that the air pressure inside the blackboard eraser is smaller than the air pressure outside the blackboard eraser, and the wiped dust is sucked into the blackboard eraser to be collected and contained, so that extra driving equipment or energy sources are not needed, the novel blackboard eraser is environment-friendly, the purposes of dust fall wiping, easy cleaning and good wiping are achieved, the operation is simple, the environment is not influenced, and the novel blackboard eraser has sustainable good development prospect.

With respect to the inner body 2, as shown in fig. 8, the inner body 2 is connected with the outer shell 3, the inner body 2 is connected with the wiper 1, the whole wall surface of the inner body 2 is in an arc structure, the bottom of the inner body 2 is bent inwards near the wiper 1, and by such arrangement, the inner body 2 is matched with the bending plate 4 to realize the molding of the arc space of the third gap 7.

With respect to the wiper 1, as shown in fig. 1, the wiper 1 is connected to the bottom of the inner body 2, the wiper 1 includes but is not limited to a sponge strip brush, and the number of the wiper 1 includes but is not limited to three, and those skilled in the art can select according to their actual needs.

Further, in order to realize the detachable connection function of the blackboard eraser, as shown in fig. 2, 3, 7 and 8, the inner body 2 is detachably connected with the outer shell 3 and the wiper 1, after the blackboard eraser is used, the outer shell 3, the inner body 2 and the wiper 1 of the whole blackboard eraser can be disassembled, dust collected on the dust escape prevention groove 40 can be poured or washed by water, and the wiper 1 can be simply washed or beaten, so that the cleaning effect can be achieved.

Specifically, for the detachable and fixed connection between the inner body 2 and the outer shell 3, one end of the outer shell 3 is connected with a first connecting plate 30, and a protrusion is arranged on the bottom wall surface of the first connecting plate 30 adjacent to the inner body 2 and used for supporting one end of the inner body 2; the inner wall of the other end of the shell 3 is provided with a connecting groove, the other end of the inner body 2 is provided with a second connecting plate 20, the second connecting plate 20 is clamped in the connecting groove, and through the arrangement, the inner body 2 and the shell 3 can be assembled and disassembled simply in a dislocation mode.

For the detachable fixed connection of the inner body 2 with the wiper 1, the wiper 1 is detachably fixed with the inner body 2.

In particular, the inner body 2 is adhesively connected to the wiper 1, and by such an arrangement, the inner body 2 can be assembled and disassembled by adhesive connection to the wiper 1.

It should be noted that the materials used for the bonding include, but are not limited to, adhesives and glues, and those skilled in the art may choose according to their actual needs.

When the blackboard is applied, the shell 3, the inner body 2 and the wiper 1 are assembled to wipe the blackboard, and the overflowed dust in the wiping process can be sucked into the shell 3 by negative pressure and is accommodated in the dust escape prevention groove 40; after the use, the outer shell 3, the inner body 2 and the wiper 1 can be removed in a staggered way, and all parts are cleaned independently.

While the foregoing is directed to the preferred embodiments of the present utility model, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the utility model, such changes and modifications are also intended to be within the scope of the utility model.

Claims (10)

1. A blackboard eraser capable of conveniently removing dust is characterized in that,

comprises a wiper, an inner body and a shell;

the wiping piece is connected with the inner body, the inner body is connected with the outer shell, the wiping piece and the outer shell are oppositely arranged at two sides of the inner body, and two bending plates are arranged between the inner body and the outer shell;

the two bending plates are oppositely arranged, a first gap is reserved between the two bending plates, the two bending plates are connected and fixed with the wall surface of the shell, and the two bending plates are bent towards the inner bottom surface of the shell;

the two bending plates and the outer shell are respectively provided with a second gap, the two bending plates and the inner body are respectively provided with a third gap, the third gaps are communicated with the second gaps through the first gaps, the third gaps are used for air intake, and the second gaps are used for accommodating dust.

2. The blackboard eraser according to claim 1, wherein the opening of the second gap adjacent to the first gap is larger than the opening of the second gap away from the first gap.

3. The blackboard eraser according to claim 1, wherein the second gap is an arc-shaped space.

4. The blackboard eraser according to claim 1, characterized in that,

the outer curved surfaces of the two curved plates are of arc-shaped structures, and the shell is of arc-shaped structures.

5. The blackboard eraser according to claim 1, wherein an opening of the third gap away from the first gap is larger than an opening of the third gap adjacent to the first gap.

6. The blackboard eraser according to claim 1, wherein the third gap is an arc-shaped space.

7. The blackboard eraser according to claim 1, characterized in that,

the inner curved surfaces of the two curved plates are of arc-shaped structures, and the wall surfaces of the inner body are of arc-shaped structures.

8. The blackboard eraser according to claim 1, wherein a plurality of dust escape preventing grooves are formed in each of the two curved plates.

9. The blackboard eraser according to claim 1, characterized in that,

the inner body is detachably and fixedly connected with the outer shell;

one end of the shell is connected with a first connecting plate, a protrusion is arranged on the wall surface of the first connecting plate adjacent to the bottom of the inner body, and the protrusion is used for supporting one end of the inner body;

the inner wall of the other end of the shell is provided with a connecting groove, the other end of the inner body is provided with a second connecting plate, and the second connecting plate is clamped in the connecting groove.

10. The blackboard eraser according to claim 1, characterized in that,

the wiper is detachably fixed with the inner body.