CN110920301A - Blackboard eraser with dust absorption function - Google Patents
Blackboard eraser with dust absorption function Download PDFInfo
- Publication number
- CN110920301A CN110920301A CN201911417800.2A CN201911417800A CN110920301A CN 110920301 A CN110920301 A CN 110920301A CN 201911417800 A CN201911417800 A CN 201911417800A CN 110920301 A CN110920301 A CN 110920301A
- Authority
- CN
- China
- Prior art keywords
- blackboard eraser
- eraser body
- blackboard
- face
- dust absorption
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L21/00—Blackboard or slate cleaning devices
- B43L21/02—Blackboard or slate cleaning devices with means for absorbing the chalk dust
Abstract
The invention discloses a blackboard eraser with a dust absorption function, which comprises a blackboard eraser body, wherein the blackboard eraser body is arranged in a hollow manner, a plurality of dust absorption holes are annularly formed in the side peripheral wall of the blackboard eraser body at equal intervals, a ball bearing is arranged on the upper end face in the blackboard eraser body, a rotary drum is vertically arranged on the inner ring of the ball bearing, ratchet teeth are annularly arranged on the outer drum wall of the blackboard eraser body, threads are arranged on the inner drum wall of the blackboard eraser body, a spring is further arranged in the blackboard eraser body, and the upper end of the spring is fixedly connected to the upper end face in the blackboard eraser body. According to the blackboard eraser, air with chalk dust around the blackboard eraser body enters the blackboard eraser body through the dust collection holes, so that the chalk dust is finally adhered to the dust adsorption net plate, the chalk dust falling from a blackboard is prevented from being absorbed by a teacher, the harm of the chalk dust to the body of the teacher is further avoided, and the normal class teaching of the teacher is facilitated.
Description
Technical Field
The invention relates to the technical field of teaching tools, in particular to a blackboard eraser with a dust collection function.
Background
The teaching tools comprise a blackboard eraser, chalk, a ruler plate, a projector and the like. The blackboard eraser is one of indispensable tools in school teaching.
In the process of erasing the blackboard by using the conventional blackboard eraser, chalk dust falls off from the blackboard and floats in the surrounding air, and after being sucked by a teacher for a long time, the chalk dust can cause great harm to the body of the teacher, so that the teacher is possibly ill and cannot normally perform teaching.
Therefore, a blackboard eraser with a dust collection function is provided to solve the problems.
Disclosure of Invention
The invention aims to solve the defects in the prior art, such as: in the process of erasing the blackboard by using the conventional blackboard eraser, chalk dust falls off from the blackboard and floats in the surrounding air, and after being sucked by a teacher for a long time, the chalk dust can cause great harm to the body of the teacher, so that the teacher is possibly ill and cannot normally perform teaching.
In order to achieve the purpose, the invention adopts the following technical scheme:
a blackboard eraser with a dust absorption function comprises a blackboard eraser body, wherein the blackboard eraser body is arranged in a hollow mode, and a plurality of dust absorption holes are formed in the side peripheral wall of the blackboard eraser body in an equidistant mode in a surrounding mode; the blackboard eraser comprises a blackboard eraser body, and is characterized in that a ball bearing is installed on the upper end face in the blackboard eraser body, a rotating drum is vertically installed on an inner ring of the ball bearing, the rotating drum can freely rotate along the axis of the rotating drum, ratchet teeth are arranged on the outer drum wall of the blackboard eraser body in a ring mode, threads are arranged on the inner drum wall of the blackboard eraser body, a spring is further installed in the blackboard eraser body, the upper end of the spring is fixedly connected with the upper end face in the blackboard eraser body, a ratchet sleeve matched with the ratchet teeth is further sleeved outside the blackboard eraser body, an impeller is further coaxially and fixedly sleeved outside the ratchet sleeve, a driving rod is further vertically arranged in the rotating drum, the lower end of the driving rod penetrates through the bottom end face of the blackboard eraser body and is fixedly connected with a pressing sheet, the upper end of the driving rod abuts against the, the blackboard eraser comprises a blackboard eraser body, a driving rod, an elastic ring, a pressing sheet and a cleaning surface, wherein the driving rod can freely rotate along the axis of the driving rod, the cleaning surface is arranged below the blackboard eraser body and is connected to the bottom end face of the blackboard eraser body through the elastic ring, a gas storage cavity is formed among the blackboard eraser body, the cleaning surface and the elastic ring, and the inner wall of the cleaning surface is bonded with the pressing sheet.
Preferably, the upper end face of the blackboard eraser body is fixedly connected with a handle, and a protrusion is arranged on the handle.
Preferably, a dust adsorption screen plate is arranged on the bottom end face in the blackboard eraser body.
Preferably, a through hole communicated with the air storage cavity is formed in the bottom end face in the blackboard eraser body.
Compared with the prior art, the invention has the beneficial effects that:
1. when the blackboard eraser is used for erasing a blackboard, the blackboard eraser body is taken up and placed on the blackboard surface by hands through the handle, the pressing sheet is extruded every time the palm presses the blackboard eraser body in the process of erasing the blackboard, thereby driving the driving rod to move upwards, the driving rod moving upwards can extrude the spring and drive the rotating drum to rotate, the rotating drum can drive the ratchet sleeve to rotate in one direction, further driving the impeller to rotate, the impeller can push the air nearby downwards along with the rotation of the impeller, so that a low-pressure area is formed at the lateral side and the upper part of the impeller, under the pressure difference between the inside and the outside of the blackboard eraser body, the air with the chalk dust around the blackboard eraser body can enter the blackboard eraser body through the dust absorption holes, so that the chalk dust is finally adhered on the dust adsorption screen plate, the chalk dust falling from the blackboard is prevented from being absorbed by teachers, further, the damage of the chalk dust to the body of the teacher is avoided, and the normal class teaching of the teacher is facilitated;
2. when the impeller pushed the air downwards, can make the air get into the gas storage intracavity, and then make the elastic ring inflation compression of gas storage chamber both sides, stretch the cleaning surface to the both sides, and then increased the area of contact of cleaning surface and blackboard, be favorable to the cleanness to the blackboard, simultaneously, the air of gas storage intracavity also has certain oppression effect to the cleaning surface, has increased the frictional force of cleaning surface and blackboard for the blackboard is clear cleaner.
Drawings
Fig. 1 is a schematic front structural view of a blackboard eraser with a dust collection function according to the present invention;
fig. 2 is a state diagram of the blackboard eraser with a dust collection function according to the present invention during operation.
In the figure: the blackboard eraser comprises an elastic ring 1, a dust suction hole 2, an impeller 3, a ratchet sleeve 4, a ball bearing 5, a spring 6, a rotary drum 7, a handle 8, a blackboard eraser body 9, a dust adsorption screen plate 10, a cleaning surface 11, a pressing sheet 12, a driving rod 13 and an air storage cavity 14.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-2, a blackboard eraser with dust collection function comprises a blackboard eraser body 9, a handle 8 is fixedly connected to the upper end face of the blackboard eraser body 9, a protrusion is arranged on the handle 8, the blackboard eraser body 9 is hollow, a dust adsorption screen plate 10 is arranged on the bottom end face in the blackboard eraser body 9, the dust adsorption screen plate 10 facilitates adhesion of chalk dust, a plurality of dust collection holes 2 are formed in the side circumferential wall of the blackboard eraser body 9 in an equidistant mode, a ball bearing 5 is arranged on the upper end face in the blackboard eraser body 9, the ball bearing 5 bears the axial load of a rotary drum 7, the rotary drum 7 is vertically arranged on the inner ring of the ball bearing 5, and the rotary drum 7 can freely rotate along the axis of the rotary drum 7.
Further, the outer cylinder wall of the blackboard eraser body 9 is provided with ratchet teeth in a surrounding manner, the inner cylinder wall of the blackboard eraser body 9 is provided with threads, a spring 6 is further installed in the blackboard eraser body 9, the upper end face of the spring 6 is fixedly connected to the upper end face of the blackboard eraser body 9, a ratchet sleeve 4 matched with the ratchet teeth is further sleeved outside the blackboard eraser body 9, an impeller 3 is further coaxially and fixedly sleeved outside the ratchet sleeve 4, a driving rod 13 is further vertically arranged in the rotating cylinder 7, the lower end of the driving rod 13 penetrates through the bottom end face of the blackboard eraser body 9 and is fixedly connected with a pressing sheet 12, the upper end of the driving rod 13 abuts against the lower end of the spring 6, one end, extending into the rotating cylinder 7, of the driving rod 13 is further provided with threads matched with the rotating cylinder 7, the driving rod 13 is slidably connected to.
Finally, a cleaning surface 11 is arranged below the blackboard eraser body 9, the lower end surface of the cleaning surface 11 is in a downward-bent arc shape, the cleaning surface 11 is connected to the bottom end surface of the blackboard eraser body 9 through an elastic ring 1, a gas storage cavity 14 is formed among the blackboard eraser body 9, the cleaning surface 11 and the elastic ring 1, a through hole communicated with the gas storage cavity 14 is formed in the bottom end surface in the blackboard eraser body 9, and the inner wall of the cleaning surface 11 is bonded with a pressing sheet 12.
In the invention, when a blackboard is erased, the blackboard eraser body 9 is lifted up and placed on the blackboard surface through the handle 8, in the process of erasing the blackboard, each time a palm presses the blackboard eraser body 9, the pressing sheet 12 is extruded by the palm, the driving rod 13 is driven to move upwards, the spring 6 is extruded by the upward movement of the driving rod 13, the rotating drum 7 is driven to rotate, the ratchet sleeve 4 is driven by the rotating drum 7 to rotate in a single direction, the impeller 3 is driven to rotate, the impeller 3 pushes the air nearby downwards along with the rotation of the impeller 3, so that a low-pressure area is formed at the lateral part and the upper part of the impeller 3, under the pressure difference between the inside and the outside of the blackboard eraser body 9, the air with chalk dust around the blackboard eraser body 9 enters the blackboard eraser body 9 through the dust absorption holes 2, the chalk dust is finally adhered to the dust absorption screen plate 10, the chalk dust falling from the blackboard is prevented from being absorbed by a teacher, and the, is beneficial to the normal teaching of teachers.
Specifically, when impeller 3 pushes down the air, can make the air get into in the gas storage chamber 14, and then make the 1 inflation compression of elastic ring of gas storage chamber 14 both sides, stretch cleaning surface 11 to both sides, and then increased the area of contact of cleaning surface 11 with the blackboard, and then increased cleaning surface 11's cleaning area, be favorable to the cleanness to the blackboard, and simultaneously, the air in the gas storage chamber 14 also has certain oppression effect to cleaning surface 11, the frictional force of cleaning surface 11 with the blackboard has been increased, make the blackboard clear cleaner.
Finally, after the blackboard is erased, the driving rod 13 rotates along the axis and resets under the action of the spring 6, in the resetting process, the thread on the driving rod 13 drives the rotating drum 7 to rotate reversely, the ratchet sleeve 4 cannot rotate due to the change of the rotating direction, and the blackboard is used for the next time after resetting.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. The blackboard eraser with the dust absorption function comprises a blackboard eraser body (9) and is characterized in that the blackboard eraser body (9) is arranged in a hollow mode, a plurality of dust absorption holes (2) are formed in the side circumferential wall of the blackboard eraser body (9) in an equidistant mode in a surrounding mode, a ball bearing (5) is installed on the upper end face in the blackboard eraser body (9), a rotary drum (7) is vertically installed on the inner ring of the ball bearing (5), ratchet teeth are annularly arranged on the outer drum wall of the blackboard eraser body (9), a spring (6) is further installed in the blackboard eraser body (9), the upper end face of the spring (6) is fixedly connected to the upper end face in the blackboard eraser body (9), a ratchet sleeve (4) matched with the ratchet teeth is further sleeved outside the blackboard eraser body (9), an impeller (3) is sleeved outside the ratchet sleeve (4), and a driving rod (13) is further vertically arranged in the rotary drum (7), the blackboard eraser is characterized in that the lower end of the driving rod (13) penetrates through the bottom end face of the blackboard eraser body (9) and is fixedly connected with a pressing sheet (12), the upper end of the driving rod (13) is abutted to the lower end of the spring (6), a cleaning surface (11) is arranged below the blackboard eraser body (9), the cleaning surface (11) is connected to the bottom end face of the blackboard eraser body (9) through an elastic ring (1), and a gas storage cavity (14) is formed among the blackboard eraser body (9), the cleaning surface (11) and the elastic ring (1).
2. The blackboard eraser with the dust absorption function according to claim 1, wherein a handle (8) is fixedly connected to the upper end face of the blackboard eraser body (9), and a protrusion is arranged on the handle (8).
3. The blackboard eraser with the dust absorption function according to claim 1, wherein a dust absorption screen plate (10) is arranged on the bottom end surface in the blackboard eraser body (9).
4. The blackboard eraser with the dust absorption function according to claim 1, wherein a through hole communicated with the air storage chamber (14) is formed on the bottom end surface in the blackboard eraser body (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911417800.2A CN110920301B (en) | 2019-12-31 | 2019-12-31 | Blackboard eraser with dust absorption function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911417800.2A CN110920301B (en) | 2019-12-31 | 2019-12-31 | Blackboard eraser with dust absorption function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110920301A true CN110920301A (en) | 2020-03-27 |
| CN110920301B CN110920301B (en) | 2021-12-14 |
Family
ID=69854565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911417800.2A Active CN110920301B (en) | 2019-12-31 | 2019-12-31 | Blackboard eraser with dust absorption function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110920301B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112622497A (en) * | 2020-12-22 | 2021-04-09 | 黄靖航 | Blackboard eraser with quick cleaning structure |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2060736U (en) * | 1989-12-20 | 1990-08-22 | 薛振兴 | Blackboard eraser with means automatically absorbing the chalk dust |
| CN2133465Y (en) * | 1992-06-06 | 1993-05-19 | 王永章 | Dust-catched eraser |
| CN2144064Y (en) * | 1992-10-21 | 1993-10-20 | 黄建伍 | Non-electric dust-proof chalk eraser |
| CN2147127Y (en) * | 1992-12-30 | 1993-11-24 | 朱庆军 | Dust suction blackboard eraser |
| CN201346939Y (en) * | 2008-12-30 | 2009-11-18 | 上海市莘格高级中学 | Dust-sucking blackboard eraser |
| CN202593110U (en) * | 2012-05-21 | 2012-12-12 | 刘继琼 | Green dustless blackboard eraser |
| CN204894911U (en) * | 2015-09-01 | 2015-12-23 | 刘景嘉 | Reduce blackboard eraser of dust volume |
| CN205890329U (en) * | 2016-05-08 | 2017-01-18 | 高若翔 | Machinery dust absorption blackboard eraser |
| CN110509695A (en) * | 2019-08-28 | 2019-11-29 | 湖北工程学院 | A kind of blackboard eraser |
| CN111216476A (en) * | 2020-01-21 | 2020-06-02 | 吴小花 | Blackboard eraser with self-dust-collection cleaning function |
-
2019
- 2019-12-31 CN CN201911417800.2A patent/CN110920301B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2060736U (en) * | 1989-12-20 | 1990-08-22 | 薛振兴 | Blackboard eraser with means automatically absorbing the chalk dust |
| CN2133465Y (en) * | 1992-06-06 | 1993-05-19 | 王永章 | Dust-catched eraser |
| CN2144064Y (en) * | 1992-10-21 | 1993-10-20 | 黄建伍 | Non-electric dust-proof chalk eraser |
| CN2147127Y (en) * | 1992-12-30 | 1993-11-24 | 朱庆军 | Dust suction blackboard eraser |
| CN201346939Y (en) * | 2008-12-30 | 2009-11-18 | 上海市莘格高级中学 | Dust-sucking blackboard eraser |
| CN202593110U (en) * | 2012-05-21 | 2012-12-12 | 刘继琼 | Green dustless blackboard eraser |
| CN204894911U (en) * | 2015-09-01 | 2015-12-23 | 刘景嘉 | Reduce blackboard eraser of dust volume |
| CN205890329U (en) * | 2016-05-08 | 2017-01-18 | 高若翔 | Machinery dust absorption blackboard eraser |
| CN110509695A (en) * | 2019-08-28 | 2019-11-29 | 湖北工程学院 | A kind of blackboard eraser |
| CN111216476A (en) * | 2020-01-21 | 2020-06-02 | 吴小花 | Blackboard eraser with self-dust-collection cleaning function |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112622497A (en) * | 2020-12-22 | 2021-04-09 | 黄靖航 | Blackboard eraser with quick cleaning structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110920301B (en) | 2021-12-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7222391B2 (en) | Wireless blackboard eraser and dust collector | |
| CN110920301B (en) | Blackboard eraser with dust absorption function | |
| CN106015276A (en) | Vacuum adsorption device adapted to wall surface with dust | |
| CN104442127A (en) | Blackboard eraser capable of sucking dust | |
| US10694908B2 (en) | Jet cleaning structure of the cleaning robot | |
| CN104149527B (en) | Dust absorption blackboard eraser | |
| CN104175763A (en) | Stereoscopic overturning blackboard | |
| CN215321675U (en) | Drawing device for teaching | |
| CN203995356U (en) | Dust absorption blackboard eraser | |
| CN103231610B (en) | Rubber crumb removal device | |
| CN111505216B (en) | Wall body and empty gas detection survey device in blank room | |
| CN203752754U (en) | Quick-dry dust-free blackboard eraser | |
| CN208468421U (en) | A kind of sucking disc type mechanical hand | |
| CN203619470U (en) | Vacuum absorption device for sewage in operating room | |
| CN207439819U (en) | A kind of pressure testing machine | |
| CN105799395A (en) | Handheld dust sucking blackboard eraser | |
| CN204340502U (en) | Dustless blackboard eraser | |
| CN207561540U (en) | A kind of cup cleaning brush | |
| CN212620526U (en) | Square plate appearance detection device for electronic product processing | |
| CN103660733B (en) | Quick-dry dust-free blackboard eraser | |
| CN103654618A (en) | Vacuum adsorption device for waste water in operating room | |
| CN220261116U (en) | Outer cylinder cutting device for combined fireworks | |
| CN213209379U (en) | Make things convenient for inflation inspection equipment of mark | |
| CN103978817A (en) | Mechanical vacuuming blackboard eraser | |
| CN203902081U (en) | Mechanical dust-collecting eraser |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20211129 Address after: 318020 Nanhu village, Shabu Town, Huangyan District, Taizhou, Zhejiang Applicant after: Taizhou Huangyan Wenke Plastic Co.,Ltd. Address before: Group 1, no.661, Lane 5, Qiang Xia Village, Peijie Town, Xia County, Yuncheng City, Shanxi Province 044499 Applicant before: Liu Xiuya |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |