CN208661867U - A kind of dust-extraction unit of keyboard of notebook computer - Google Patents
A kind of dust-extraction unit of keyboard of notebook computer Download PDFInfo
- Publication number
- CN208661867U CN208661867U CN201820851781.9U CN201820851781U CN208661867U CN 208661867 U CN208661867 U CN 208661867U CN 201820851781 U CN201820851781 U CN 201820851781U CN 208661867 U CN208661867 U CN 208661867U
- Authority
- CN
- China
- Prior art keywords
- keyboard
- rotation axis
- adjustable shelf
- dust
- fixedly connected
- 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.)
- Expired - Fee Related
Links
Landscapes
- Input From Keyboards Or The Like (AREA)
Abstract
The utility model relates to Computer Maintenance equipment technical fields, and disclose a kind of dust-extraction unit of keyboard of notebook computer, including adjustable shelf, maintenance set is fixedly installed in the middle part of the adjustable shelf side, the inner ring of the maintenance set is connected with rotation axis, the rotation axis runs through adjustable shelf, and one end of the rotation axis is fixedly installed with limit plate, and the both ends of the rotation axis are fixedly connected to the traveling nut inside adjustable shelf.The dust-extraction unit of the keyboard of notebook computer, by opening motor, make the rotation of its output shaft that dust removal brush be driven to rotate synchronously, telescopic rod is moved up when being squeezed, it is moved down under the elastic force effect of spring when extruding force is eliminated, the function that the gap between the keyboard and keycap to different height carries out deep clean is realized, dust removal brush is avoided and is in the problem of same height is to clear up the gap between keycap always, improve the comprehensive of device.
Description
Technical field
The utility model relates to Computer Maintenance equipment technical field, specially a kind of dust-extraction unit of keyboard of notebook computer.
Background technique
Computor-keyboard is the channel the control information input computer of text information, from the keyboard of english typewriter develop and
Come, keyboard of notebook computer is a kind of instruction and data input unit for this operation of Operational Note, and keyboard of notebook computer is as most
Common is also most important input equipment, English alphabet, number, punctuation mark etc. can be input to notebook by keyboard
In, to issue order, input data etc. to laptop.
But the keyboard on notebook was after using long-time, can be covered with dust all over above and bacterium, endangered user
Health, usually we will use dust removal brush or towel wipes, but cleans to exist and be in same always in dust removal brush
Height to can not clear up the gap between keycap, some burnishers then appear in the pen towards different model
When remembering this keyboard, fixture size can not be adjusted, and led to problems such as device that can not clamp and be not thorough so that cleaning.
Utility model content
(1) the technical issues of solving
In view of the deficiencies of the prior art, the utility model provides a kind of dust-extraction unit of keyboard of notebook computer, has cleaning
The advantages that effect is good, the simply easy batch micro operations of structure, and it is convenient to operate, small in volume, solves towards different model
When keyboard of notebook computer, fixture size can not be adjusted, and caused device that can not clamp and be not thorough so that cleaning, and dust removal brush is in same always
The problem of height of sample is to clear up the gap between keycap.
(2) technical solution
To realize that above-mentioned cleaning effect is good, the simply easy batch micro operations of structure operate convenient, the purpose of small in volume,
The utility model provides the following technical solutions: a kind of dust-extraction unit of keyboard of notebook computer, including adjustable shelf, the adjustable shelf side
Middle part be fixedly installed with maintenance set, the inner ring of the maintenance set is connected with rotation axis, and the rotation axis runs through adjustable shelf,
One end of the rotation axis is fixedly installed with limit plate, and the both ends of the rotation axis are fixedly connected to inside adjustable shelf
Traveling nut, the inner cavity of the traveling nut offers thread groove, and two traveling nuts by thread groove and are located at rotation axis
On screw flight socket, the other end of the rotation axis is fixedly connected with the turntable outside adjustable shelf, the turntable
Quantity altogether there are two, the bottom of the adjustable shelf offers sliding groove, and the two sides at the top of adjustable shelf by sliding groove respectively with
Two supporting blocks are flexibly connected, and the top of two supporting blocks is fixedly connected with the bottom of two traveling nuts respectively, described
The bottom of supporting block side is fixedly connected with the outer ring of bearing, and the inner ring fixing sleeve of the bearing is connected to connecting rod, the connection
The top fixing sleeve of bar is connected to guide wheel, and the top fixing sleeve of the connecting rod is connected to thread spindle I, the middle part activity of the supporting block
It is connected with rotary shaft, the equal fixing sleeve in the both ends of the rotary shaft is connected to the thread spindle II inside supporting block, the thread spindle
II outer and thread spindle I are intermeshed, and one end of the rotary shaft is fixedly connected with one of them outside supporting block
Turntable, the bottom of two supporting block sides are fixedly installed with the gasket positioned at bearing side, the bottom of two gaskets
It is flexibly connected respectively with the two sides at the top of keyboard, the bottom of the adjustable shelf is fixedly connected with the dress of the cleaning above keyboard
Set, the quantity of the clearing apparatus altogether there are three.
Preferably, the clearing apparatus includes fixed block, and the top of the fixed block is fixedly connected with the bottom of adjustable shelf,
The bottom of the fixed block opens up grooved hole, and the bottom of fixed block is flexibly connected by slot with the middle part of telescopic rod, described
The top of fixed block inner cavity is fixedly connected with the top of spring, and the top of fixed block inner cavity is connected by spring and telescopic rod transmission
It connects, the bottom end of the telescopic rod is fixedly connected with motor, and fixing sleeve is connected to dust removal brush, the dedusting on the output shaft of the motor
The bottom of brush is flexibly connected with the top of keyboard.
Preferably, the metallic rod that the rotation axis is long 0.5m and radius is 2cm, the rotation axis and rotary shaft are mutually flat
Row, the turntable outer ring that the rotation axis other end is fixedly connected are equipped with non-slip groove.
Preferably, the diameter of the guide wheel is less than the distance between bottom and keyboard side of supporting block, the guide wheel
Outer ring does not contact with each other with the side of supporting block.
Preferably, the rotary shaft is mutually perpendicular to connecting rod, and the rotary shaft does not contact with each other with three clearing apparatus,
The other end of the rotary shaft is fixedly connected with limited block.
Preferably, the section of the gasket is the square that side length is 3cm, the bottom of the gasket and at the top of keyboard two
Side is flexibly connected.
(3) beneficial effect
Compared with prior art, the utility model provides a kind of dust-extraction unit of keyboard of notebook computer, has following beneficial
Effect:
1, the dust-extraction unit of the keyboard of notebook computer drives two inside adjustable shelf by rotating the turntable of rotation axis one end
A screw rod is rotated towards different directions, drives two traveling nuts and supporting block to relatively move and close to each other, in the opposite direction
Turntable is rotated, two traveling nuts and supporting block movement can be driven and is located remotely from each other, realizes and manually controls two supporting blocks
The distance between function, avoid face different model keyboard of notebook computer when, can not clamp cause to clean it is halfway
Problem improves the comprehensive of device.
2, the dust-extraction unit of the keyboard of notebook computer makes the rotation of its output shaft drive dust removal brush is synchronous to turn by opening motor
Dynamic, telescopic rod is moved up when being squeezed, and is moved down, is realized under the elastic force effect of spring when extruding force is eliminated
The function that deep clean is carried out to the gap between the keyboard and keycap of different height, avoids dust removal brush and is in same always
Height to the gap between keycap can not be cleared up the problem of, improve the comprehensive of device.
Detailed description of the invention
Fig. 1 is the utility model structure front schematic view；
Fig. 2 is the utility model structure clearing apparatus schematic diagram.
In figure: 1 adjustable shelf, 2 maintenance sets, 3 rotation axis, 4 limit plates, 5 traveling nuts, 6 screw rods, 7 turntables, 8 sliding grooves, 9
Supporting block, 10 bearings, 11 connecting rods, 12 guide wheels, 13 thread spindles I, 14 rotary shafts, 15 thread spindles II, 16 gaskets, 17 keyboards, 18
Clearing apparatus, 181 fixed blocks, 182 telescopic rods, 183 springs, 184 motors, 185 dust removal brush.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
The middle part of a kind of dust-extraction unit of keyboard of notebook computer referring to FIG. 1-2, including adjustable shelf 1,1 side of adjustable shelf is solid
Equipped with maintenance set 2, the inner ring of maintenance set 2 is connected with rotation axis 3 for Dingan County, and rotation axis 3 is the gold that long 0.5m and radius are 2cm
Belong to bar, rotation axis 3 is parallel to each other with rotary shaft 14, and 7 outer ring of turntable that 3 other end of rotation axis is fixedly connected is equipped with non-slip groove, leads to
The turntable 7 of rotation 3 one end of rotation axis is crossed, drives two screw rods 6 inside adjustable shelf 1 to rotate towards different directions, drives two work
Dynamic nut 5 and the relative movement of supporting block 9 are simultaneously close to each other, rotate turntable 7 in the opposite direction, can drive two traveling nuts
5 and supporting block 9 it is mobile and be located remotely from each other, realize the function of manually controlling the distance between two supporting blocks 9, avoid in face
When to the keyboard of notebook computer of different model, can not clamp leads to clean halfway problem, improves the comprehensive of device, rotates
Axis 3 runs through adjustable shelf 1, and one end of rotation axis 3 is fixedly installed with limit plate 4, and the both ends of rotation axis 3 are fixedly connected to be located at and live
Traveling nut 5 inside moving frame 1, the inner cavity of traveling nut 5 offer thread groove, and two traveling nuts 5 by thread groove with
6 screw thread of screw rod socket in rotation axis 3, the other end of rotation axis 3 are fixedly connected with the turntable 7 outside adjustable shelf 1,
There are two the quantity of turntable 7 is total, the bottom of adjustable shelf 1 offers sliding groove 8, and the two sides at 1 top of adjustable shelf pass through sliding groove 8
It being flexibly connected respectively with two supporting blocks 9, the top of two supporting blocks 9 is fixedly connected with the bottom of two traveling nuts 5 respectively,
The bottom of 9 side of supporting block is fixedly connected with the outer ring of bearing 10, and the inner ring fixing sleeve of bearing 10 is connected to connecting rod 11, connecting rod
11 top fixing sleeve is connected to guide wheel 12, and the diameter of guide wheel 12 is less than the distance between bottom and 17 side of keyboard of supporting block 9,
Side of the outer ring of guide wheel 12 not with supporting block 9 contacts with each other, and the structure being flexibly connected by guide wheel 12 with keyboard 17 realizes
The movable function in easy to support piece 9 side along keyboard 17, improves the mobility of device, and the top of connecting rod 11 is fixedly attached
There is thread spindle I 13, the middle part of supporting block 9 is connected with rotary shaft 14, and rotary shaft 14 is mutually perpendicular to connecting rod 11, rotary shaft
14 do not contact with each other with three clearing apparatus 18, and the other end of rotary shaft 14 is fixedly connected with limited block, not by rotary shaft 14
The structure to contact with each other with three clearing apparatus 18 avoids and rotary shaft while realizing 18 clearing function of clearing apparatus
14 mutually cards touch, and cause device that can not apply, improve the reasonability of device, the equal fixing sleeve in the both ends of rotary shaft 14, which is connected to, to be located at
Thread spindle II 15 inside supporting block 9, the outer of thread spindle II 15 and thread spindle I 13 are intermeshed, and one end of rotary shaft 14 is solid
Surely the bottom of the one of turntable 7 being connected with outside supporting block 9, two 9 sides of supporting block is fixedly installed with positioned at axis
The gasket 16 of 10 sides is held, the section of gasket 16 is the square that side length is 3cm, the bottom of gasket 16 and the two of 17 top of keyboard
Side is flexibly connected, by being flexibly connected the structure of gasket 16 in the two sides at the top of keyboard 17, realize to the side of keyboard 17 into
The function of the position of row cleaning and fixed support block 9, improves the high efficiency of device, the bottom of two gaskets 16 respectively with key
The two sides at 17 top of disk are flexibly connected, and the bottom of adjustable shelf 1 is fixedly connected with the clearing apparatus 18 above keyboard 17, cleans
Device 18 includes fixed block 181, and the top of fixed block 181 is fixedly connected with the bottom of adjustable shelf 1, and the bottom of fixed block 181 is opened
Equipped with slot, and the bottom of fixed block 181 is flexibly connected by slot with the middle part of telescopic rod 182, the top of 181 inner cavity of fixed block
Portion is fixedly connected with the top of spring 183, and the top of 181 inner cavity of fixed block is connected by spring 183 and the transmission of telescopic rod 182
It connects, the bottom end of telescopic rod 182 is fixedly connected with motor 184, and fixing sleeve is connected to dust removal brush 185, dedusting on the output shaft of motor 184
The bottom of brush 185 is flexibly connected with the top of keyboard 17, by opening motor 184, the rotation of its output shaft is made to drive dust removal brush 185
Rotate synchronously, telescopic rod 182 moves up when being squeezed, when extruding force is eliminated under the elastic force effect of spring 183 to
Lower movement realizes the function that the gap between the keyboard and keycap to different height carries out deep clean, avoids dedusting
The problem of brush 185 is always in same height to clear up the gap between keycap, improves the complete of device
Face property, the quantity of clearing apparatus 18 altogether there are three.
When work, the turntable 7 of 3 one end of rotation axis is rotated, two screw rods 6 inside adjustable shelf 1 is driven to revolve towards different directions
Turn, drives two traveling nuts 5 and supporting block 9 to relatively move and close to each other, device is fixed on key using two supporting blocks 9
17 top of disk, opens motor 184, makes the rotation of its output shaft that dust removal brush 185 be driven to rotate synchronously, telescopic rod 182 is being squeezed
When move up, when extruding force eliminate when spring 183 elastic force effect under move down, to the keyboard and key of different height
Gap between cap carries out deep clean, and the turntable 7 of 1 lower section of rotation adjustable shelf drives thread spindle I 13 and guide wheel 12 to rotate, so that
Device cleans keyboard 17 along 17 liang of Slideslips of keyboard comprehensively.
In conclusion the dust-extraction unit of the keyboard of notebook computer drives adjustable shelf by rotating the turntable 7 of 3 one end of rotation axis
Two screw rods 6 inside 1 are rotated towards different directions, and two traveling nuts 5 and supporting block 9 is driven to relatively move and close to each other,
Turntable 7 is rotated in the opposite direction, can drive two traveling nuts 5 and the movement of supporting block 9 and is located remotely from each other, and is realized manually
The function of controlling the distance between two supporting blocks 9 avoids when facing the keyboard of notebook computer of different model, can not clamp and lead
It causes to clean halfway problem, improves the comprehensive of device；By opening motor 184, the rotation of its output shaft is made to drive dedusting
Brush 185 rotates synchronously, and telescopic rod 182 is moved up when being squeezed, and acts on when extruding force is eliminated in the elastic force of spring 183
Under move down, realize the function that gap between the keyboard and keycap to different height carries out deep clean, avoid
The problem of dust removal brush 185 is always in same height to clear up the gap between keycap, improves device
It is comprehensive；It solves in the keyboard of notebook computer towards different model, fixture size can not be adjusted, and cause device that can not clamp
So that cleaning is not thorough, dust removal brush 185 is always in same height to clear up the gap between keycap
Problem.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (6)
1. a kind of dust-extraction unit of keyboard of notebook computer, including adjustable shelf (1), it is characterised in that: in adjustable shelf (1) side
Portion is fixedly installed with maintenance set (2), and the inner ring of the maintenance set (2) is connected with rotation axis (3), and the rotation axis (3) is passed through
It wears adjustable shelf (1), one end of the rotation axis (3) is fixedly installed with limit plate (4), and the both ends of the rotation axis (3) are fixed
It is connected with and is located at adjustable shelf (1) internal traveling nut (5), the inner cavity of the traveling nut (5) offers thread groove, and two
Traveling nut (5) is socketed by thread groove with screw rod (6) screw thread being located on rotation axis (3), the other end of the rotation axis (3)
Be fixedly connected with and be located at adjustable shelf (1) external turntable (7), the quantity of the turntable (7) altogether there are two, the adjustable shelf (1)
Bottom offer sliding groove (8), and the two sides at the top of adjustable shelf (1) are living with two supporting blocks (9) respectively by sliding groove (8)
Dynamic connection, the top of two supporting blocks (9) are fixedly connected with the bottom of two traveling nuts (5) respectively, the supporting block
(9) bottom of side is fixedly connected with the outer ring of bearing (10), and the inner ring fixing sleeve of the bearing (10) is connected to connecting rod (11),
The top fixing sleeve of the connecting rod (11) is connected to guide wheel (12), and the top fixing sleeve of the connecting rod (11) is connected to thread spindle I
(13), it is connected with rotary shaft (14) in the middle part of the supporting block (9), the equal fixing sleeve in both ends of the rotary shaft (14) is connected to
The thread spindle II (15) internal positioned at supporting block (9), the outer of the thread spindle II (15) and thread spindle I (13) are intermeshed,
One end of the rotary shaft (14) is fixedly connected with the one of turntable (7) external positioned at supporting block (9), two supports
The bottom of block (9) side is fixedly installed with the gasket (16) positioned at bearing (10) side, the bottom point of two gaskets (16)
It is not flexibly connected with the two sides at the top of keyboard (17), the bottom of the adjustable shelf (1) is fixedly connected with above keyboard (17)
Clearing apparatus (18), the quantity of the clearing apparatus (18) altogether there are three.
2. a kind of dust-extraction unit of keyboard of notebook computer according to claim 1, it is characterised in that: the clearing apparatus (18)
Including fixed block (181), the top of the fixed block (181) is fixedly connected with the bottom of adjustable shelf (1), the fixed block
(181) bottom opens up grooved hole, and the bottom of fixed block (181) is flexibly connected by slot with the middle part of telescopic rod (182),
The top of fixed block (181) inner cavity is fixedly connected with the top of spring (183), and the top of fixed block (181) inner cavity is logical
It crosses spring (183) and telescopic rod (182) to be sequentially connected, the bottom end of the telescopic rod (182) is fixedly connected with motor (184), institute
It states fixing sleeve on the output shaft of motor (184) to be connected to dust removal brush (185), bottom and keyboard (17) of the dust removal brush (185)
Top is flexibly connected.
3. a kind of dust-extraction unit of keyboard of notebook computer according to claim 1, it is characterised in that: the rotation axis (3) is
The metallic rod that long 0.5m and radius are 2cm, the rotation axis (3) are parallel to each other with rotary shaft (14), and the rotation axis (3) is another
Turntable (7) outer ring being fixedly connected is held to be equipped with non-slip groove.
4. a kind of dust-extraction unit of keyboard of notebook computer according to claim 1, it is characterised in that: the guide wheel (12) it is straight
Diameter is less than the bottom and the distance between keyboard (17) side of supporting block (9), the outer ring of the guide wheel (12) not with supporting block (9)
Side contact with each other.
5. a kind of dust-extraction unit of keyboard of notebook computer according to claim 1, it is characterised in that: the rotary shaft (14) with
Connecting rod (11) is mutually perpendicular to, and the rotary shaft (14) does not contact with each other with three clearing apparatus (18), the rotary shaft (14)
The other end be fixedly connected with limited block.
6. a kind of dust-extraction unit of keyboard of notebook computer according to claim 1, it is characterised in that: gasket (16) are cutd open
Face is the square that side length is 3cm, and the bottom of the gasket (16) is flexibly connected with the two sides at the top of keyboard (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820851781.9U CN208661867U (en) | 2018-06-04 | 2018-06-04 | A kind of dust-extraction unit of keyboard of notebook computer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820851781.9U CN208661867U (en) | 2018-06-04 | 2018-06-04 | A kind of dust-extraction unit of keyboard of notebook computer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208661867U true CN208661867U (en) | 2019-03-29 |
Family
ID=65823692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820851781.9U Expired - Fee Related CN208661867U (en) | 2018-06-04 | 2018-06-04 | A kind of dust-extraction unit of keyboard of notebook computer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208661867U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111318495A (en) * | 2020-02-29 | 2020-06-23 | 龚建英 | Keyboard cleaning equipment |
| CN110252698B (en) * | 2019-07-23 | 2020-09-01 | 绍兴文理学院 | Cleaner suitable for cleaning mahjong summer sleeping mat |
| CN112133043A (en) * | 2020-09-10 | 2020-12-25 | 山东同其数字技术有限公司 | Wisdom payment device based on brush face data analysis |
| CN112229354A (en) * | 2020-09-27 | 2021-01-15 | 林志鹏 | Highway bridge tunnel crack depth measuring instrument |
-
2018
- 2018-06-04 CN CN201820851781.9U patent/CN208661867U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110252698B (en) * | 2019-07-23 | 2020-09-01 | 绍兴文理学院 | Cleaner suitable for cleaning mahjong summer sleeping mat |
| CN111318495A (en) * | 2020-02-29 | 2020-06-23 | 龚建英 | Keyboard cleaning equipment |
| CN111318495B (en) * | 2020-02-29 | 2021-05-14 | 威海汇晟智能装备有限公司 | Keyboard cleaning equipment |
| CN112133043A (en) * | 2020-09-10 | 2020-12-25 | 山东同其数字技术有限公司 | Wisdom payment device based on brush face data analysis |
| CN112229354A (en) * | 2020-09-27 | 2021-01-15 | 林志鹏 | Highway bridge tunnel crack depth measuring instrument |
| CN112229354B (en) * | 2020-09-27 | 2022-06-28 | 林志鹏 | Highway bridge tunnel crack depth measuring instrument |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208661867U (en) | A kind of dust-extraction unit of keyboard of notebook computer | |
| CN110270763A (en) | A kind of clean type laser marking system with positioning function | |
| CN104786224A (en) | Human-simulated robot lower jaw chewing movement mechanism | |
| CN108831259A (en) | The braille point of four cam coaxials driving shows device | |
| CN109515035A (en) | A kind of clean blackboard for education of segmented | |
| CN206588056U (en) | Anti-static silica gel diaphragm dust arrester | |
| CN106510540A (en) | Window-wiping robot for civil buildings | |
| CN208321594U (en) | Take dustproof function's mutual touch-control all-in-one of novel education | |
| CN208213769U (en) | The swab of computer display | |
| CN216486199U (en) | Notebook computer capable of being turned over by 360 degrees | |
| CN215448082U (en) | Water meter with self-cleaning capability | |
| CN216431135U (en) | Multimedia equipment for teaching | |
| CN109130602A (en) | Auxiliary tool is used in a kind of drawing of mathematical education | |
| CN202638828U (en) | Dish brushing mechanism for cleaning machine | |
| CN208643105U (en) | A kind of furniture mopping device | |
| CN208758238U (en) | Bore cleaning machine transmission system | |
| CN209312280U (en) | A kind of aobvious device of braille point of four cam coaxials driving | |
| CN201777693U (en) | Work head spacing varying device | |
| CN208050425U (en) | A kind of rotation cleaning machine of lead screw | |
| CN209037252U (en) | A kind of Chinese Teaching for Middle School blackboard | |
| CN110718111A (en) | Educational psychology memory judgment demonstration device | |
| CN209248475U (en) | A kind of keyboard with clear dirt function | |
| CN109048959B (en) | Arm for robot capable of flexibly steering | |
| CN214037683U (en) | Movable interactive LED display screen | |
| CN204894904U (en) | Black board |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20190329 Termination date: 20200604 |