CN207140636U - A kind of dust-proof automatically cleaning blackboard - Google Patents
A kind of dust-proof automatically cleaning blackboard Download PDFInfo
- Publication number
- CN207140636U CN207140636U CN201720589037.1U CN201720589037U CN207140636U CN 207140636 U CN207140636 U CN 207140636U CN 201720589037 U CN201720589037 U CN 201720589037U CN 207140636 U CN207140636 U CN 207140636U
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- Prior art keywords
- dust
- rectangular
- blackboard
- lateral brace
- hole
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- Expired - Fee Related
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- 238000004140 cleaning Methods 0.000 title claims abstract description 42
- 239000000428 dust Substances 0.000 claims abstract description 89
- 238000003860 storage Methods 0.000 claims abstract description 20
- 238000003466 welding Methods 0.000 claims description 12
- 241000826860 Trapezium Species 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005337 ground glass Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
It the utility model is related to a kind of teaching aid, in particular it is a kind of dust-proof automatically cleaning blackboard, blackboard automatically cleaning can be realized, while caused dust in writing and wiping process can be adsorbed, specific region can also be wiped by adjusting the position of blackboard eraser when cleaning blackboard.A kind of dust-proof automatically cleaning blackboard, including lateral brace, dust base, asepwirator pump, dust storage tank, movable grillage, blackboard eraser, upper mounted plate, electric expansion bar, by cleaning blackboard, it is characterised in that：Described lateral brace includes lateral brace body, rectangular through-hole, rectangle chute, multiple manholes, and lateral brace body is rectangular configuration, and lateral brace body upper and lower end face is provided with rectangular through-hole, and the side end face of lateral brace body is provided with rectangle chute；Described movable grillage includes movable grillage body, rectangular shaped slider, rectangular opening, T-slot；Described blackboard eraser includes blackboard eraser connector, T-connecting piece, rubbing head.
Description
Technical field
A kind of teaching aid is the utility model is related to, is in particular a kind of dust-proof automatically cleaning blackboard.
Background technology
Blackboard is not to refer in particular to the plate face of black, said in traditional sense it be one can be hard with the plane of repeated writing, plate face
Firmly, it is used for imparting knowledge to students.Made of plank or ground glass etc., it can be write with chalk above, blackboard needs in use
Old person's handwriting is often wiped, writes new content, and caused dust can be to Faculty and Students' health during blackboard wiping
Adversely affect.
Such as a kind of roller that number of patent application is CN201620129965.5 utilizes roller motor from dustproof blackboard is wiped
Driving roller bearing switches over the writing surface of blackboard panel two, while is carried out the blackboard iron sheet for being inverted to the back side using wiping arrangement
Dynamic wipes repeatedly, avoids manual wipping and contacts the dust harzard of wiper cord, while using the wiping located at cradle back
Device prevents blackboard iron sheet writing powder from wiping unclean situation using linear electric motors power faster reciprocal motion；In cradle back
Set chute to be used for spacing dust blowing mechanism and keep fit-state with blackboard iron sheet, play more preferable wiping effect.But the practicality
The new plate face that can not be directed to particular range is wiped, and dust-proof effect is poor.
Utility model content
The purpose of this utility model is to provide a kind of dust-proof automatically cleaning blackboard, it is possible to achieve blackboard automatically cleaning, while can be with
Caused dust in absorption writing and wiping process, can also be specific by adjusting the position wiping of blackboard eraser when cleaning blackboard
Region.
The purpose of this utility model is achieved through the following technical solutions：
A kind of dust-proof automatically cleaning blackboard, including lateral brace, dust base, asepwirator pump, dust storage tank, movable grillage, blackboard eraser,
Upper mounted plate, electric expansion bar, by cleaning blackboard, it is characterised in that：Described lateral brace includes lateral brace body, rectangle leads to
Hole, rectangle chute, multiple manholes, lateral brace body are rectangular configuration, and lateral brace body upper and lower end face is provided with rectangle and led to
Hole, the side end face of lateral brace body are provided with rectangle chute, on the side end face of lateral brace body, the rear and front end of rectangle chute from
Top to bottm is uniformly arranged multiple manholes, and multiple manholes connect with rectangular through-hole；
Described dust base includes dust base body, square-grid, floor, rectangle connecting hole, dust base body
Internal hollow out, upper end are rectangular configuration, lower end is trapezium structure, and dust base body upper surface passes through bonding connection rectangular grid
Grid, multiple square through-holes are provided with square-grid, and the upper surface of dust base body, the left and right ends of square-grid are set
There is rectangle connecting hole, multiple square through-holes, the rectangle connecting hole of square-grid connect with dust base body inside, dust
Base body lower surface is provided with circular dust collection hole, and circular dust collection hole inside dust base body with connecting；
Described asepwirator pump left end is provided with air inlet pipe by welding, and asepwirator pump right-hand member is provided with escape pipe by welding；
Described dust storage tank is the rectangular parallelepiped structure of internal hollow out, and the left end of dust storage tank is collected by being welded to connect dust
Pipe, dust collecting pipe inside dust storage tank with connecting；
Described movable grillage includes movable grillage body, rectangular shaped slider, rectangular opening, T-slot, and movable grillage body is length
Cube structure, the left and right ends of movable grillage body are respectively connected with rectangular shaped slider, the front end face of movable grillage body by welding
T-slot is provided with, T-slot runs through the left and right end face of movable grillage body, and the front end face center of movable grillage body is symmetrical
Two rectangular openings are provided with, rectangular opening connects with T-slot；
Described blackboard eraser includes blackboard eraser connector, T-connecting piece, rubbing head, and blackboard eraser connector is horizontal U-shaped knot
Structure, the left side upper end of blackboard eraser connector is by being welded to connect two T-connecting pieces, under the left side of blackboard eraser connector
End passes through bonding connection rubbing head, and rubbing head is semi-cylindrical structure；
Described upper mounted plate is rectangular configuration, and the upper surface of upper mounted plate is provided centrally with expansion link mounting hole, is stretched
Bar mounting hole is manhole；
Described is rectangular configuration by cleaning blackboard；
Described electric expansion bar is by being welded to connect in the expansion link mounting hole of upper mounted plate, under electric expansion bar
End is connected by welding with the upper surface center of movable grillage, and two rectangular shaped sliders of described movable grillage are plugged on two respectively
In the rectangle chute of individual two lateral braces, the T-slot of the T-connecting piece of described blackboard eraser and movable grillage forms gap and matched somebody with somebody
Close, the lower surface left and right ends of described upper mounted plate are by being welded to connect two lateral braces, the rectangle chute of two lateral braces
It is oppositely arranged, described two lateral brace lower ends are connected by being welded to connect dust base, the rectangular through-hole of lateral brace with rectangle
Hole connects, described dust base lower surface by being welded to connect the air inlet pipe of asepwirator pump, the circular dust collection hole of dust base with
Air inlet pipe connects, and the escape pipe of described asepwirator pump and the dust collecting pipe of dust storage tank are described to be cleaned by being welded to connect
Blackboard is by bonding connection in the rear end of two lateral braces.
As the further optimization of the technical program, two described in a kind of dust-proof automatically cleaning blackboard of the utility model are collateral
The rectangle chute of post coordinates with the rectangular shaped slider gap of movable grillage.
As the further optimization of the technical program, the T-shaped connection described in a kind of dust-proof automatically cleaning blackboard of the utility model
Part is made up of the first rectangular block, the second rectangular block, the right side of the left side of the first rectangular block and the second rectangular block centrally through
It is welded to connect, the rectangular end face of the second rectangular block is identical with the size of rectangular opening.
As the further optimization of the technical program, the connection rubbing head described in a kind of dust-proof automatically cleaning blackboard of the utility model
Contacted with by cleaning blackboard, connection rubbing head is semi-cylindrical felt.
A kind of dust-proof automatically cleaning blackboard of the utility model has the beneficial effect that：
A kind of dust-proof automatically cleaning blackboard of the utility model, by past above and below electric expansion bar drive activity grillage, blackboard eraser
Multiple motion, rubbing head by cleaning blackboard CONTACT WITH FRICTION with being wiped by cleaning blackboard；Write, wipe across in the presence of asepwirator pump
Caused dust can be pooled to dust storage tank by the square-grid of multiple manhole and dust bases on lateral brace in journey
Interior, the dust for avoiding suspending damages to human body；Slided by the T-connecting piece of blackboard eraser in the T-slot of movable grillage,
Adjust the wiped area of blackboard eraser.
Brief description of the drawings
The utility model is described in more detail with specific implementation method below in conjunction with the accompanying drawings.
Fig. 1 is overall structure diagram of the present utility model；
Fig. 2 is lateral brace structural representation of the present utility model；
Fig. 3 is dust understructure schematic diagram of the present utility model；
Fig. 4 is asepwirator pump structural representation of the present utility model；
Fig. 5 is dust storage tank structural representation of the present utility model；
Fig. 6 is movable grillage structural representation of the present utility model；
Fig. 7 is wiping blackboard structure schematic diagram one of the present utility model；
Fig. 8 is wiping blackboard structure schematic diagram two of the present utility model；
Fig. 9 is T-connecting piece structural representation of the present utility model；
Figure 10 is upper mounted plate structural representation of the present utility model；
Figure 11 is internal circuit diagram of the present utility model.
In figure：Lateral brace 1；Lateral brace body 1-1；Rectangular through-hole 1-2；Rectangle chute 1-3；Manhole 1-4；
Dust base 2；Dust base body 2-1；Square-grid 2-2；Floor 2-3；Rectangle connecting hole 2-4；
Asepwirator pump 3；Air inlet pipe 3-1；Escape pipe 3-2；
Dust storage tank 4；Dust collecting pipe 4-1；
Movable grillage 5；Movable grillage body 5-1；Rectangular shaped slider 5-2；Rectangular opening 5-3；T-slot 5-4；
Blackboard eraser 6；Blackboard eraser connector 6-1；T-connecting piece 6-2；First rectangular block 6-2-1；Second rectangular block 6-2-2；
Rubbing head 6-3；
Upper mounted plate 7；Expansion link mounting hole 7-1；
Electric expansion bar 8；
By cleaning blackboard 9.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings.
Embodiment one：
Illustrate present embodiment, a kind of dust-proof automatically cleaning blackboard, bag with reference to Fig. 1,2,3,4,5,6,7,8,9,10,11
Include lateral brace 1, dust base 2, asepwirator pump 3, dust storage tank 4, movable grillage 5, blackboard eraser 6, upper mounted plate 7, electric expansion bar 8,
By cleaning blackboard 9, it is characterised in that：Described lateral brace 1 includes lateral brace body 1-1, rectangular through-hole 1-2, rectangle chute 1-
3rd, multiple manhole 1-4, lateral brace body 1-1 are rectangular configuration, and lateral brace body 1-1 upper and lower end faces are provided with rectangular through-hole
1-2, lateral brace body 1-1 side end face are provided with rectangle chute 1-3, on lateral brace body 1-1 side end face, rectangle chute 1-
3 rear and front end is uniformly arranged multiple manhole 1-4 from top to bottom, and multiple manhole 1-4 connect with rectangular through-hole 1-2；
Described dust base 2 includes dust base body 2-1, square-grid 2-2, floor 2-3, rectangle connecting hole 2-4,
Dust base body 2-1 inside hollow out, upper end are rectangular configuration, lower end is trapezium structure, and dust base body 2-1 upper surfaces lead to
Cross on bonding connection square-grid 2-2, square-grid 2-2 and be provided with multiple square through-holes, dust base body 2-1 upper end
Face, square-grid 2-2 left and right ends are provided with rectangle connecting hole 2-4, square-grid 2-2 multiple square through-holes, rectangle
For connecting hole 2-4 with being connected inside dust base body 2-1, dust base body 2-1 lower surfaces are provided with circular dust collection hole, circle
Shape dust collection hole inside dust base body 2-1 with connecting；
The described left end of asepwirator pump 3 is provided with air inlet pipe 3-1 by welding, and the right-hand member of asepwirator pump 3 is provided with out by welding
Tracheae 3-2；
Described dust storage tank 4 is the rectangular parallelepiped structure of internal hollow out, and the left end of dust storage tank 4 is collected by being welded to connect dust
Pipe 4-1, dust collecting pipe 4-1 connect with the inside of dust storage tank 4；
Described movable grillage 5 includes movable grillage body 5-1, rectangular shaped slider 5-2, rectangular opening 5-3, T-slot 5-4, living
Dynamic grillage body 5-1 is rectangular parallelepiped structure, and movable grillage body 5-1 left and right ends are respectively connected with rectangular shaped slider 5- by welding
2, movable grillage body 5-1 front end face are provided with T-slot 5-4, and T-slot 5-4 runs through movable grillage body 5-1 left and right end
Face, movable grillage body 5-1 front end face center are symmetrically set with two rectangular opening 5-3, rectangular opening 5-3 and T-slot 5-4
Connection；
Described blackboard eraser 6 includes blackboard eraser connector 6-1, T-connecting piece 6-2, rubbing head 6-3, blackboard eraser connector 6-1
For horizontal U-shaped structure, blackboard eraser connector 6-1 left side upper end is black by being welded to connect two T-connecting piece 6-2
By bonding connection rubbing head 6-3, rubbing head 6-3 is semi-cylindrical structure for blackboard eraser connector 6-1 left side lower end；
Described upper mounted plate 7 is rectangular configuration, and the upper surface of upper mounted plate 7 is provided centrally with expansion link mounting hole 7-1,
Expansion link mounting hole 7-1 is manhole；
Described is rectangular configuration by cleaning blackboard 9；
Described electric expansion bar 8 is by being welded to connect in the expansion link mounting hole 7-1 of upper mounted plate 7, electric expansion
The lower end of bar 8 is connected by welding with the upper surface center of movable grillage 5, two rectangular shaped slider 5-2 of described movable grillage 5
It is plugged on respectively in the rectangle chute 1-3 of two two lateral braces 1, the T-connecting piece 6-2 and portable plate of described blackboard eraser 6
The T-slot 5-4 of frame 5 forms gap and coordinated, and the lower surface left and right ends of described upper mounted plate 7 are collateral by being welded to connect two
Post 1, the rectangle chute 1-3 of two lateral braces 1 are oppositely arranged, and described two lower ends of lateral brace 1 are by being welded to connect dust bottom
Seat 2, the rectangular through-hole 1-2 of lateral brace 1 connects with rectangle connecting hole 2-4, and the described lower surface of dust base 2 is by being welded to connect
The air inlet pipe 3-1 of asepwirator pump 3, the circular dust collection hole of dust base 2 connect with air inlet pipe 3-1, the escape pipe of described asepwirator pump 3
The dust collecting pipe 4-1 of 3-2 and dust storage tank 4 by being welded to connect, it is described by cleaning blackboard 9 by bonding connection two sides
The rear end of pillar 1.
Embodiment two：
Illustrate present embodiment with reference to Fig. 1,2,3,4,5,6,7,8,9,10,11, present embodiment is to embodiment
One is described further, and the rectangle chute 1-3 of described two lateral braces 1 and movable grillage 5 rectangular shaped slider 5-2 gaps are matched somebody with somebody
Close.
Embodiment three：
Illustrate present embodiment with reference to Fig. 1,2,3,4,5,6,7,8,9,10,11, present embodiment is to embodiment
One is described further, and described T-connecting piece 6-2 is made up of the first rectangular block 6-2-1, the second rectangular block 6-2-2, the first square
Shape block 6-2-1 left side and the second rectangular block 6-2-2 right side centrally through being welded to connect, the second rectangular block 6-2-2's
Rectangular end face is identical with rectangular opening 5-3 size.
Embodiment four：
Illustrate present embodiment with reference to Fig. 1,2,3,4,5,6,7,8,9,10,11, present embodiment is to embodiment
One is described further, and described connection rubbing head 6-3 contacts with by cleaning blackboard 9, and connection rubbing head 6-3 is semi-cylindrical felt.
Described electric expansion bar 8 is in parallel with asepwirator pump 3 in circuit, and electric expansion bar 8 is controlled by switching K1, asepwirator pump
3 by switching K2 controls, electric expansion bar 8 model JINGE-1601, the model 2XZ-1 of asepwirator pump 3.
A kind of dust-proof automatically cleaning blackboard of the present utility model, its operation principle are：
Closure switch K2, asepwirator pump 3 work will writing, in wiping process caused dust pass through it is multiple on lateral brace 1
The square-grid 2-2 of manhole 1-4 and dust base 2 is drawn into dust storage tank 4；Closure switch K1, the work of electric expansion bar 8
Make, drive activity grillage 5, blackboard eraser 6 pump, and rubbing head 6-3 is clear with being wiped by the CONTACT WITH FRICTION of cleaning blackboard 9
Clean blackboard 9；Horizontally slipped by the T-connecting piece 6-2 of blackboard eraser 6 in the T-slot 5-4 of movable grillage 5, adjust blackboard eraser 6
Wiped area；The T-connecting piece 6-2 of blackboard eraser 6 is slided in the T-slot 5-4 of movable grillage 5, make the second rectangular block 6-
2-2 aligns with rectangular opening 5-3, now blackboard eraser 6 can be pulled down from movable grillage 5, is easy to the cleaning of blackboard eraser 6；It is described
Dust base 2 square-grid 2-2 upper surfaces on, can be used for placing the religion such as chalk between cleaning blackboard 9 and floor 2-3
Articles for use are learned, facilitate teacher to take.
Certainly, described above is not limitation of the utility model, and the utility model is also not limited to the example above, this skill
The variations, modifications, additions or substitutions that the those of ordinary skill in art field is made in essential scope of the present utility model, also belong to
In the scope of protection of the utility model.
Claims (4)
1. a kind of dust-proof automatically cleaning blackboard, including lateral brace (1), dust base (2), asepwirator pump (3), dust storage tank (4), portable plate
Frame (5), blackboard eraser (6), upper mounted plate (7), electric expansion bar (8), by cleaning blackboard (9), it is characterised in that：Described is collateral
Post (1) includes lateral brace body (1-1), rectangular through-hole (1-2), rectangle chute (1-3), multiple manholes (1-4), lateral brace
Body (1-1) is rectangular configuration, and lateral brace body (1-1) upper and lower end face is provided with rectangular through-hole (1-2), lateral brace body (1-
1) side end face is provided with rectangle chute (1-3), on the side end face of lateral brace body (1-1), front and rear the two of rectangle chute (1-3)
End is uniformly arranged multiple manholes (1-4) from top to bottom, and multiple manholes (1-4) connect with rectangular through-hole (1-2)；
Described dust base (2) includes dust base body (2-1), square-grid (2-2), floor (2-3), rectangle connecting hole
(2-4), the internal hollow out of dust base body (2-1), upper end are rectangular configuration, lower end is trapezium structure, dust base body (2-
1) upper surface is provided with multiple square through-holes, dust bottom by bonding connection square-grid (2-2) on square-grid (2-2)
Upper surface, the left and right ends of square-grid (2-2) of seat body (2-1) are provided with rectangle connecting hole (2-4), square-grid (2-
2) multiple square through-holes, rectangle connecting hole (2-4) connects with dust base body (2-1) inside, dust base body
(2-1) lower surface is provided with circular dust collection hole, and circular dust collection hole inside dust base body (2-1) with connecting；
Described asepwirator pump (3) left end is provided with air inlet pipe (3-1) by welding, and asepwirator pump (3) right-hand member is provided with by welding
Escape pipe (3-2)；
Described dust storage tank (4) is the rectangular parallelepiped structure of internal hollow out, and the left end of dust storage tank (4) is collected by being welded to connect dust
Manage (4-1), dust collecting pipe (4-1) inside dust storage tank (4) with connecting；
Described movable grillage (5) includes movable grillage body (5-1), rectangular shaped slider (5-2), rectangular opening (5-3), T-slot (5-
4), movable grillage body (5-1) is rectangular parallelepiped structure, and the left and right ends of movable grillage body (5-1) are respectively connected with by welding
Rectangular shaped slider (5-2), the front end face of movable grillage body (5-1) are provided with T-slot (5-4), and T-slot (5-4) runs through portable plate
The left and right end face of frame body (5-1), the front end face center of movable grillage body (5-1) are symmetrically set with two rectangular openings
(5-3), rectangular opening (5-3) connect with T-slot (5-4)；
Described blackboard eraser (6) includes blackboard eraser connector (6-1), T-connecting piece (6-2), rubbing head (6-3), blackboard eraser connection
Part (6-1) is horizontal U-shaped structure, and the left side upper end of blackboard eraser connector (6-1) is connected by being welded to connect two T-shaped
Part (6-2), by bonding connection rubbing head (6-3), rubbing head (6-3) is semicolumn for the left side lower end of blackboard eraser connector (6-1)
Shape structure；
Described upper mounted plate (7) is rectangular configuration, and the upper surface of upper mounted plate (7) is provided centrally with expansion link mounting hole (7-
1), expansion link mounting hole (7-1) is manhole；
Described is rectangular configuration by cleaning blackboard (9)；
Described electric expansion bar (8) is electronic to stretch by being welded to connect in the expansion link mounting hole (7-1) of upper mounted plate (7)
The lower end of contracting bar (8) is connected by welding with the upper surface center of movable grillage (5), two squares of described movable grillage (5)
Shape sliding block (5-2) is plugged in the rectangle chute (1-3) of two two lateral braces (1) respectively, the T-shaped of described blackboard eraser (6)
The T-slot (5-4) of connector (6-2) and movable grillage (5) forms gap and coordinated, and the lower surface of described upper mounted plate (7) is left
Right both ends are oppositely arranged by being welded to connect two lateral braces (1), the rectangle chute (1-3) of two lateral braces (1), and described two
Individual lateral brace (1) lower end is by being welded to connect dust base (2), rectangular through-hole (1-2) and the rectangle connecting hole of lateral brace (1)
(2-4) is connected, and described dust base (2) lower surface is by being welded to connect the air inlet pipe (3-1) of asepwirator pump (3), dust base
(2) circular dust collection hole connects with air inlet pipe (3-1), the escape pipe (3-2) of described asepwirator pump (3) and the ash of dust storage tank (4)
Dirt collecting pipe (4-1) by being welded to connect, it is described by cleaning blackboard (9) by bonding connection after two lateral braces (1)
End.
A kind of 2. dust-proof automatically cleaning blackboard according to claim 1, it is characterised in that：Two described lateral braces (1)
Rectangular shaped slider (5-2) gap of rectangle chute (1-3) and movable grillage (5) coordinates.
A kind of 3. dust-proof automatically cleaning blackboard according to claim 1, it is characterised in that：Described T-connecting piece (6-2) by
First rectangular block (6-2-1), the second rectangular block (6-2-2) are formed, left side and the second rectangular block of the first rectangular block (6-2-1)
The right side of (6-2-2) is centrally through being welded to connect, the rectangular end face of the second rectangular block (6-2-2) and the chi of rectangular opening (5-3)
It is very little identical.
A kind of 4. dust-proof automatically cleaning blackboard according to claim 1, it is characterised in that：Described connection rubbing head (6-3) with
Contacted by cleaning blackboard (9), connection rubbing head (6-3) is semi-cylindrical felt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720589037.1U CN207140636U (en) | 2017-05-25 | 2017-05-25 | A kind of dust-proof automatically cleaning blackboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720589037.1U CN207140636U (en) | 2017-05-25 | 2017-05-25 | A kind of dust-proof automatically cleaning blackboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207140636U true CN207140636U (en) | 2018-03-27 |
Family
ID=61659469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720589037.1U Expired - Fee Related CN207140636U (en) | 2017-05-25 | 2017-05-25 | A kind of dust-proof automatically cleaning blackboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207140636U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109363400A (en) * | 2018-12-21 | 2019-02-22 | 张艺凡 | A kind of teaching demonstration device |
| CN109440847A (en) * | 2018-11-30 | 2019-03-08 | 卢小玲 | A kind of building bull-dozer with clearing function |
-
2017
- 2017-05-25 CN CN201720589037.1U patent/CN207140636U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109440847A (en) * | 2018-11-30 | 2019-03-08 | 卢小玲 | A kind of building bull-dozer with clearing function |
| CN109363400A (en) * | 2018-12-21 | 2019-02-22 | 张艺凡 | A kind of teaching demonstration device |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180327 Termination date: 20190525 |