CN106364222A - Dust-free teaching system for chalk writing - Google Patents
Dust-free teaching system for chalk writing Download PDFInfo
- Publication number
- CN106364222A CN106364222A CN201610754972.9A CN201610754972A CN106364222A CN 106364222 A CN106364222 A CN 106364222A CN 201610754972 A CN201610754972 A CN 201610754972A CN 106364222 A CN106364222 A CN 106364222A
- Authority
- CN
- China
- Prior art keywords
- chalk
- housing
- writing
- students
- dust
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K19/00—Non-propelling pencils; Styles; Crayons; Chalks
- B43K19/14—Sheathings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K23/00—Holders or connectors for writing implements; Means for protecting the writing-points
- B43K23/016—Holders for crayons or chalks
-
- 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
Landscapes
- Drawing Aids And Blackboards (AREA)
Abstract
The invention discloses a dust-free teaching system for chalk writing. The dust-free teaching system for chalk writing comprises a chalk sleeve, an internal thread, thread-shaped silica gel, a screw rod and a dust collection device, wherein the chalk sleeve comprises a shell, the shell is of a strip-shaped hollow structure, and a first shell part and a second shell part which are mutually connected end to end are comprised in the length direction of the shell; the internal thread is arranged on the inner sidewall of the shell; the thread-shaped silica gel is inlaid and distributed on the inner sidewall of the shell with the internal thread; the screw rod is in threaded connection with the shell; and the dust collection device is a strip-shaped groove body with an open upper end, the dust collection device is horizontally arranged on a writing surface of a backboard, the two ends of the dust collection device are in slide connection with the two side edges of the backboard, and the surface of the dust collection device has the same colour as the backboard. The dust-free teaching system for chalk writing, which is disclosed by the invention, is capable of providing the chalk sleeve for sleeving and fixing a chalk for writing for a user, and protecting the hands of the user from being polluted; and moreover, the dust collection device is also capable of synchronously collecting scattering chalk dust during writing, without pollution to an indoor environment.
Description
Technical field
The present invention relates to teaching aid technical field, particularly to a kind of chalk-writing dustless system of imparting knowledge to students.
Background technology
Chalk is widely used instrument in daily teaching, is generally used for being written on blackboard, and the composition of chalk is sulphuric acid
, it is not easy to be decomposed, granule is bigger than dust for a kind of white depositions of calcium.Now, the chalk of domestic use mainly has common flour
Pen and two kinds of dust-free chalk (watery chalk), dust-free chalk belongs to the improvement product of common chalk it is intended to eliminate classroom chalk dust
Pollution.Dust-free chalk is to be made by special macromolecular material and pigment, and can write on dry blackboard also can be in wet blackboard
Write above, but, due in order that it does not produce dust when writing, improve the fastness on its adhesion and blackboard, therefore,
Xerotripsis is difficult for drop-off, and it is higher than common chalk cost, and general applicability is relatively low.
In addition, common common chalk occupation mode is that directly hand-held chalk is write, on the one hand, when chalk is long
When be susceptible to fracture, on the other hand, when chalk is written to remaining 1/5 length, user often cannot be affectedly bashful, need more
Change, the chalk end that this abandons successively is a kind of waste of resource really.And because chalk is higher containing alkalescence, take for a long time
Pinch, cause certain pollution also to the skin of user, and the silty on its surface is also easily bonded at garment surface, is not easy to
Carry.
For overcoming problems above it would be highly desirable to there be a kind of dustless system that existing common chalk can be coordinated to use.
Content of the invention
It is an object of the invention to solution at least the above, and provide the advantage that at least will be described later.
It is a still further object of the present invention to provide a kind of chalk-writing dustless system of imparting knowledge to students, it provides chalk for user
Cover sheathed chalk of fixing to be write, protect the handss of user not to be contaminated, and, can also be same writing dust arrester installation simultaneously
Step, by the chalk ash collection being scattered, does not pollute to indoor environment.
In order to realize according to object of the present invention and further advantage, there is provided a kind of chalk-writing dustless system that imparts knowledge to students
System is it is characterised in that include:
Chalk sleeve, comprising:
Housing, described housing is strip hollow structure, includes head and the tail and be mutually linked on the length direction of described housing
The first housing section and the second housing section, described first housing section by two cross sections be semicircular first open slot and
Second open slot button able to turn on or off is set as type, and one end of the wherein first open slot is fixedly installed on the second housing section
One end, one end of the second open slot is arranged with one end pivot joint of described second housing section, and described first housing section and second shell
The length ratio of body is 1:1-2；Female thread, it is arranged on the medial wall of described housing；Screw-like silica gel, it is interior with described
Screw thread patchiness is on the medial wall of described housing, and the thickness of described screw-like silica gel is more than the height of female thread, interior spiral shell
The pitch of stricture of vagina is more than the width of described screw-like silica gel；
Screw rod, it is threadeded with described housing, and one end of described screw rod is from close second housing section of described housing
Opening insert described housing in, the end face of one end of described screw rod is provided with layer of silica gel；
Dust arrester installation, it is the strip cell body of upper end open, and described dust arrester installation is horizontally set on the writing surface of blackboard
On, and two sides of the two ends of described dust arrester installation and blackboard are along being slidably connected, the surface of described dust arrester installation and blackboard with
Color.
Preferably, wherein, also include:
Buckle, it includes retainer ring, and it is opened on the lateral wall of described second open slot；Fixing band, its one end is fixed
On described first open slot lateral wall, the other end extends and is attached at one end of described fixing band after inserting in described retainer ring
Outer surface on.
Preferably, wherein, described retainer ring outside button be provided with and housing radian identical cap body, and described cap body away from
The ultimate range of shrinking away from theshell body is 3mm.
Preferably, wherein, the outer surface of described housing is uniformly arranged multiple projections, and the height of described projection is less than 2mm.
Preferably, wherein, also include:
Water tank, it is embedded to be arranged in the body of wall of blackboard side；
Micropump, it is arranged in described water tank；
Atomizer, it tilts at least 45 degree angles and is arranged in described dust arrester installation, and the spray height of atomizer
It is not higher than the upper end open of described dust arrester installation, in a dust arrester installation, be at least obliquely installed two atomizers；And
Conduit, its one end is connected with the outfan of described micropump, and the other end is connected with the water inlet end of atomizer.
Preferably, wherein, the length of described housing is less than 15cm.
Preferably, wherein, the overall diameter of described housing is 30-40mm.
Preferably, wherein, also include:
Driving means, it is arranged on described dust collection plate with two sides of described blackboard along the place that is slidably connected；And
Move up switch and move down switch, it drives described driving means to move upwards or transport downwards respectively
Dynamic.
Preferably, wherein, the injection direction of two neighboring atomizer is consistent, and between two neighboring atomizer
Distance is more than 50cm.
Preferably, wherein, also include:
Handle, it is arranged on the other end of described screw rod.
The present invention at least includes following beneficial effect:
First open slot and the second open slot button able to turn on or off are set as type, convenient chalk are placed in housing；Screw rod with
Housing is threaded, gradually shortening with chalk, and chalk manually gradually can be ejected housing by rotary screw by user,
Convenient use, does not waste chalk；Screw-like silica gel has necessarily elasticity and adhesiveness, increases the frictional force to chalk side wall for the housing,
Even if in use, housing has certain extruding to chalk, chalk, and, the diameter of existing common chalk also will not be damaged
It is gradually increased, the setting of screw-like silica gel makes housing interior diameter can have a range of adjustment effect, and powder will not occur
The stub end of pen cannot eject the phenomenon of housing；
Dust arrester installation is used for sliding up and down on the writing surface of blackboard, closely collects the chalk dust being scattered from chalk；
Atomizer makes to yet forms both small-sized atomisation environment in the groove of dust arrester installation, can effectively catch and
Adsorb chalk dust, greatly improve the dust collection performance of dust arrester installation, and, atomizer is all to be inclined at dust arrester installation
In interior groove it is seen that the groove substantially without departing from dust arrester installation for the spraying, the attention attracting student can be prevented effectively from, also
The effect applying certain wet air around user can be given to a certain extent, improve the environment near dais.
In sum, present configuration is simple, easy to use.
Part is embodied by the further advantage of the present invention, target and feature by description below, and part also will be by this
Invention research and practice and be understood by the person skilled in the art.
Brief description
Fig. 1 is the side structure schematic diagram of the described chalk sleeve of the present invention；
Fig. 2 is the vertical profile structural representation of the described chalk sleeve of the present invention；
Fig. 3 is the positive structure diagram of the described dust arrester installation of the present invention；
Fig. 4 is the vertical profile structural representation of the described dust arrester installation of the present invention；
Fig. 5 is the side structure schematic diagram in another embodiment of described chalk sleeve of the present invention.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art with reference to description literary composition
Word can be implemented according to this.
It should be appreciated that used herein such as " have ", "comprising" and " inclusion " term do not allot one or many
The presence of individual other element or a combination thereof or interpolation.
The present invention provides a kind of chalk-writing dustless system of imparting knowledge to students it is characterised in that including:
As shown in Figure 1, 2, chalk sleeve, comprising:
Housing, described housing is strip hollow structure, includes head and the tail and be mutually linked on the length direction of described housing
The first housing section and the second housing section 3, described first housing section is semicircular first open slot 1 and the by two cross sections
Two open slots button able to turn on or off is set as type, and one end of the wherein first open slot is fixedly installed on one end of the second housing section, and second
One end of open slot 2 is arranged with one end pivot joint of described second housing section, and the length of described first housing section and the second housing section
Degree ratio is 1:1-2；Female thread 4, it is arranged on the medial wall of described housing；Screw-like silica gel 5, it is inlayed with described female thread
On the embedding medial wall being distributed in described housing, and the thickness of described screw-like silica gel is more than the height of female thread, the spiral shell of female thread
Away from the width more than described screw-like silica gel；
Screw rod 6, it is threadeded with described housing, and one end of described screw rod is from close second housing section of described housing
Opening insert described housing in, the end face of one end of described screw rod is provided with layer of silica gel；
Dust arrester installation 10, it is the strip cell body of upper end open, and described dust arrester installation is horizontally set on writing of blackboard
On face, and two sides of the two ends of described dust arrester installation and blackboard are along being slidably connected, the surface of described dust arrester installation and blackboard
Homochromy.
In such scheme, the first open slot and the second open slot button able to turn on or off are set as type, convenient are placed into chalk
In housing；Screw rod is threadeded with housing, gradually shortening with chalk, user can manually rotary screw by chalk
Gradually eject housing, convenient use, do not waste chalk；Screw-like silica gel has necessarily elasticity and adhesiveness, increases housing to chalk
The frictional force of side wall, even if in use, housing has certain extruding to chalk, also will not damage chalk, and, existing general
The diameter of logical chalk is gradually increased, and the setting of screw-like silica gel makes housing interior diameter that a range of regulation can be had to make
With the stub end of chalk will not be occurred cannot to eject the phenomenon of housing；
Dust arrester installation is used for sliding up and down on the writing surface of blackboard, closely collects the chalk dust being scattered from chalk；
Dust arrester installation is homochromy with blackboard, has certain stealth effect.
As shown in figure 5, in a preferred version, also including:
Buckle, it includes retainer ring 14, and it is opened on the lateral wall of described second open slot；Fixing band 13, its one end
It is fixed on described first open slot lateral wall, the other end extends after inserting in described retainer ring and is attached at described fixing band
On the outer surface of one end.
In such scheme, buckle can easily be opened, and inserted chalk in housing with facilitating, and fixed.
In one preferred version, the outside button of described retainer ring is provided with and housing radian identical cap body, and described cap body
It is 3mm apart from the ultimate range of housing.
In such scheme, cap body can be provided with the sense of discomfort of retainer ring by minimizing consistent with the arc of housing, and
And provide a grip part with certain degree of friction to user.
In one preferred version, the outer surface of described housing is uniformly arranged multiple projections, and the height of described projection is less than
2mm.
As shown in Figure 3,4, in a preferred version, also include:
Water tank 9, it is embedded to be arranged in the body of wall of blackboard side；
Micropump, it is arranged in described water tank；
Atomizer 12, it tilts at least 45 degree angles and is arranged in described dust arrester installation, and the spraying of atomizer is high
Degree is not higher than the upper end open of described dust arrester installation, is at least obliquely installed two atomizers in a dust arrester installation；And
Conduit 11, its one end is connected with the outfan of described micropump, and the other end is connected with the water inlet end of atomizer.
In the first string, directly closely collect chalk dust, can dedusting to a certain extent, and in this programme,
The combination of above-mentioned each device, so that yet forms both small-sized atomisation environment in the groove of dust arrester installation, can effectively catch
With adsorb chalk dust, greatly improve the dust collection performance of dust arrester installation, and, atomizer be all to be inclined at the dress that gathers dust
In groove in putting it is seen that the groove substantially without departing from dust arrester installation for the spraying, the attention attracting student can be prevented effectively from,
The effect applying certain wet air around user can also be given to a certain extent, improve the environment near dais.
As shown in figure 1, in a preferred version, the length of described housing is less than 15cm.
As shown in figure 1, in a preferred version, the overall diameter of described housing is 30-40mm.
In one preferred version, also include:
Driving means, it is arranged on described dust collection plate with two sides of described blackboard along the place that is slidably connected；And
Move up switch and move down switch, it drives described driving means to move upwards or transport downwards respectively
Dynamic.
In such scheme, user can adjust the height of dust arrester installation, convenient use manually.
In one preferred version, the injection direction of two neighboring atomizer is consistent, and between two neighboring atomizer
Distance be more than 50cm.
As shown in figure 5, in a preferred version, also including:
Handle 15, it is arranged on the other end of described screw rod.
Although embodiment of the present invention is disclosed as above, it is not restricted to listed in description and embodiment
With, it can be applied to various suitable the field of the invention completely, for those skilled in the art, can be easily
Realize other modification, therefore under the general concept being limited without departing substantially from claim and equivalency range, the present invention does not limit
In specific details with shown here as the legend with description.
Claims (10)
1. a kind of chalk-writing dustless system of imparting knowledge to students is it is characterised in that include:
Chalk sleeve, comprising:
Housing, described housing is strip hollow structure, include on the length direction of described housing that head and the tail are mutually linked the
One housing section and the second housing section, described first housing section is semicircular first open slot and the second opening by two cross sections
Groove button able to turn on or off is set as type, and one end of the wherein first open slot is fixedly installed on one end of the second housing section, the second open slot
One end and described second housing section one end pivot joint setting, and described first housing section with the length ratio of the second housing section is
1:1-2；Female thread, it is arranged on the medial wall of described housing；Screw-like silica gel, it is with described female thread patchiness in institute
State on the medial wall of housing, and the thickness of described screw-like silica gel is more than the height of female thread, the pitch of female thread is more than described
The width of screw-like silica gel；
Screw rod, it is threadeded with described housing, and one end of described screw rod opening from close second housing section of described housing
Mouth end is inserted in described housing, and the end face of one end of described screw rod is provided with layer of silica gel；
Dust arrester installation, it is the strip cell body of upper end open, and described dust arrester installation is horizontally set on the writing surface of blackboard, and
, along being slidably connected, the surface of described dust arrester installation is homochromy with blackboard for the two ends of described dust arrester installation and the two of blackboard sides.
2. chalk-writing as claimed in claim 1 imparts knowledge to students dustless system it is characterised in that also including:
Buckle, it includes retainer ring, and it is opened on the lateral wall of described second open slot；Fixing band, its one end is fixed on institute
State on the first open slot lateral wall, the other end extend after inserting in described retainer ring and be attached at described fixing band one end outer
On surface.
3. chalk-writing as claimed in claim 1 imparts knowledge to students dustless system it is characterised in that the outside button of described retainer ring sets
Have and housing radian identical cap body, and described cap body is 3mm apart from the ultimate range of housing.
4. chalk-writing as claimed in claim 1 dustless system of imparting knowledge to students is it is characterised in that the outer surface of described housing is uniform
Multiple projections are set, and the height of described projection is less than 2mm.
5. chalk-writing as claimed in claim 1 imparts knowledge to students dustless system it is characterised in that also including:
Water tank, it is embedded to be arranged in the body of wall of blackboard side；
Micropump, it is arranged in described water tank；
Atomizer, it tilts at least 45 degree angles and is arranged in described dust arrester installation, and the spray height of atomizer is not high
At least it is obliquely installed two atomizers in the upper end open of described dust arrester installation, a dust arrester installation；And
Conduit, its one end is connected with the outfan of described micropump, and the other end is connected with the water inlet end of atomizer.
6. chalk-writing as claimed in claim 1 impart knowledge to students dustless system it is characterised in that the length of described housing be less than
15cm.
7. chalk-writing as claimed in claim 1 imparts knowledge to students dustless system it is characterised in that the overall diameter of described housing is
30-40mm.
8. chalk-writing as claimed in claim 1 imparts knowledge to students dustless system it is characterised in that also including:
Driving means, it is arranged on described dust collection plate with two sides of described blackboard along the place that is slidably connected；And
Move up switch and move down switch, it drives described driving means to move upwards or move downward respectively.
9. chalk-writing as claimed in claim 5 dustless system of imparting knowledge to students is it is characterised in that the spray of two neighboring atomizer
Penetrate direction consistent, and the distance between two neighboring atomizer is more than 50cm.
10. chalk-writing as claimed in claim 1 imparts knowledge to students dustless system it is characterised in that also including:
Handle, it is arranged on the other end of described screw rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610754972.9A CN106364222B (en) | 2016-08-29 | 2016-08-29 | The dustless system of chalk-writing teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610754972.9A CN106364222B (en) | 2016-08-29 | 2016-08-29 | The dustless system of chalk-writing teaching |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106364222A true CN106364222A (en) | 2017-02-01 |
| CN106364222B CN106364222B (en) | 2019-01-01 |
Family
ID=57900615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610754972.9A Active CN106364222B (en) | 2016-08-29 | 2016-08-29 | The dustless system of chalk-writing teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106364222B (en) |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201350749Y (en) * | 2008-12-25 | 2009-11-25 | 上海市闸北区中小学科技指导站 | Precession type chalk sleeve |
| CN201380696Y (en) * | 2009-03-27 | 2010-01-13 | 金用晤 | Dustless environment-friendly blackboard |
| CN201922724U (en) * | 2011-01-11 | 2011-08-10 | 田文壮 | Chalk saving device |
| CN202573422U (en) * | 2012-03-30 | 2012-12-05 | 邢祥爱 | Chalk sleeve |
| CN202669270U (en) * | 2012-04-10 | 2013-01-16 | 张陆航 | Novel chalk clip |
| CN202716603U (en) * | 2012-07-16 | 2013-02-06 | 程畔畔 | Chalk case |
| CN103029491A (en) * | 2011-09-29 | 2013-04-10 | 梁诗琦 | Double-end chalk clamp |
| CN202986559U (en) * | 2012-11-30 | 2013-06-12 | 王浩博 | Dust-free blackboard eraser |
| CN203078139U (en) * | 2012-12-31 | 2013-07-24 | 刘苏扬 | Dustproof blackboard |
| CN203084987U (en) * | 2013-03-20 | 2013-07-24 | 邱加玉 | Teaching rod |
| CN203228539U (en) * | 2013-03-25 | 2013-10-09 | 施梦妮 | Pliers for holding chalk during writing |
| CN204077142U (en) * | 2014-07-05 | 2015-01-07 | 李佳 | A kind of chalk sleeve |
| CN104553534A (en) * | 2015-01-29 | 2015-04-29 | 曹进 | Blackboard eraser cleaning device |
| CN104669838A (en) * | 2013-11-30 | 2015-06-03 | 谷佩锡 | Chalk sleeve |
| CN204687619U (en) * | 2015-06-18 | 2015-10-07 | 程娇 | A kind of English teaching chalk sleeve |
| CN204936586U (en) * | 2015-08-06 | 2016-01-06 | 王澳西 | A kind of novel chalk casing |
| CN205075500U (en) * | 2015-09-16 | 2016-03-09 | 西安科技大学 | Wax crayon protection is pressed from both sides |
| CN205439690U (en) * | 2015-12-28 | 2016-08-10 | 郑州工业应用技术学院 | Automatic wash blackboard |
-
2016
- 2016-08-29 CN CN201610754972.9A patent/CN106364222B/en active Active
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201350749Y (en) * | 2008-12-25 | 2009-11-25 | 上海市闸北区中小学科技指导站 | Precession type chalk sleeve |
| CN201380696Y (en) * | 2009-03-27 | 2010-01-13 | 金用晤 | Dustless environment-friendly blackboard |
| CN201922724U (en) * | 2011-01-11 | 2011-08-10 | 田文壮 | Chalk saving device |
| CN103029491A (en) * | 2011-09-29 | 2013-04-10 | 梁诗琦 | Double-end chalk clamp |
| CN202573422U (en) * | 2012-03-30 | 2012-12-05 | 邢祥爱 | Chalk sleeve |
| CN202669270U (en) * | 2012-04-10 | 2013-01-16 | 张陆航 | Novel chalk clip |
| CN202716603U (en) * | 2012-07-16 | 2013-02-06 | 程畔畔 | Chalk case |
| CN202986559U (en) * | 2012-11-30 | 2013-06-12 | 王浩博 | Dust-free blackboard eraser |
| CN203078139U (en) * | 2012-12-31 | 2013-07-24 | 刘苏扬 | Dustproof blackboard |
| CN203084987U (en) * | 2013-03-20 | 2013-07-24 | 邱加玉 | Teaching rod |
| CN203228539U (en) * | 2013-03-25 | 2013-10-09 | 施梦妮 | Pliers for holding chalk during writing |
| CN104669838A (en) * | 2013-11-30 | 2015-06-03 | 谷佩锡 | Chalk sleeve |
| CN204077142U (en) * | 2014-07-05 | 2015-01-07 | 李佳 | A kind of chalk sleeve |
| CN104553534A (en) * | 2015-01-29 | 2015-04-29 | 曹进 | Blackboard eraser cleaning device |
| CN204687619U (en) * | 2015-06-18 | 2015-10-07 | 程娇 | A kind of English teaching chalk sleeve |
| CN204936586U (en) * | 2015-08-06 | 2016-01-06 | 王澳西 | A kind of novel chalk casing |
| CN205075500U (en) * | 2015-09-16 | 2016-03-09 | 西安科技大学 | Wax crayon protection is pressed from both sides |
| CN205439690U (en) * | 2015-12-28 | 2016-08-10 | 郑州工业应用技术学院 | Automatic wash blackboard |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106364222B (en) | 2019-01-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106364222A (en) | Dust-free teaching system for chalk writing | |
| CN101085584A (en) | Environmental protection chalk | |
| CN106218272B (en) | Teaching dust arrester installation | |
| CN202764550U (en) | Dustproof blackboard eraser | |
| CN201291694Y (en) | Environment protection black board eraser | |
| CN204955867U (en) | Dust -proof blackboard eraser | |
| CN106394069B (en) | The dustless suit of teaching | |
| CN106313947A (en) | Environment-friendly dust-free teaching aid with humidifying device | |
| CN201869830U (en) | Glove for handwriting, plotting, drawing or erasing | |
| CN201979965U (en) | Dustproof eraser | |
| CN201752980U (en) | Dustproof chalk sleeve | |
| CN208558733U (en) | A kind of chalk sleeve | |
| CN201736590U (en) | Automatic chalk | |
| CN201610029U (en) | Dust-absorbing blackboard eraser | |
| CN205736549U (en) | Dust suction automatic blackboard eraser | |
| CN207871538U (en) | A kind of multi-functional plastic spliced toy | |
| CN203920103U (en) | Hand is not stained with dirt chalk | |
| CN101417575B (en) | Environment-friendly dust-proof eraser | |
| CN202062867U (en) | Automatic chalk popping-up device | |
| CN209756540U (en) | Novel writing brush | |
| CN209995564U (en) | dry and wet two-purpose powder puff | |
| CN201941334U (en) | Finger sleeve pen | |
| CN201385526Y (en) | Blackboard dustproof curtain | |
| CN206141164U (en) | Clean formula chalk shell | |
| CN209051200U (en) | A kind of writing brush of replaceable pen point |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211101 Address after: 530002 Jinwo Bay, 200 Nan Wu Road, Xingning District, Nanning, the Guangxi Zhuang Autonomous Region Patentee after: Shi Guangfu Address before: 530002 Jinwo Bay, 200 Nan Wu Road, Xingning District, Nanning, the Guangxi Zhuang Autonomous Region Patentee before: Peng Zhanzhong |
|
| TR01 | Transfer of patent right |