CN106308055A - Shear-type teacher's desk adopting synchronous belt for lifting adjustment - Google Patents
Shear-type teacher's desk adopting synchronous belt for lifting adjustment Download PDFInfo
- Publication number
- CN106308055A CN106308055A CN201611001164.1A CN201611001164A CN106308055A CN 106308055 A CN106308055 A CN 106308055A CN 201611001164 A CN201611001164 A CN 201611001164A CN 106308055 A CN106308055 A CN 106308055A
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- CN
- China
- Prior art keywords
- desktop
- platform
- scissors
- shear
- desk
- 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.)
- Pending
Links
- 230000001360 synchronised Effects 0.000 title abstract 8
- 241001633942 Dais Species 0.000 claims description 32
- 239000000463 material Substances 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 abstract description 6
- 230000000875 corresponding Effects 0.000 abstract 1
- 230000002093 peripheral Effects 0.000 abstract 1
- 239000000725 suspension Substances 0.000 description 5
- 239000000284 extract Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000002965 rope Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 206010041591 Spinal osteoarthritis Diseases 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001808 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002452 interceptive Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B1/00—Extensible tables
- A47B1/04—Extensible tables with supplementary leaves or drop leaves arranged at the periphery
- A47B1/05—Extensible tables with supplementary leaves or drop leaves arranged at the periphery the leaves being extensible by drawing-out
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B13/00—Details of tables or desks
- A47B13/08—Table tops; Rims therefor
- A47B13/081—Movable, extending, sliding table tops
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B13/00—Details of tables or desks
- A47B13/08—Table tops; Rims therefor
- A47B13/16—Holders for glasses, ashtrays, lamps, candles or the like forming part of tables
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B19/00—Reading-desks; Lecterns; Pulpits, i.e. free-standing
- A47B19/06—Reading-desks; Lecterns; Pulpits, i.e. free-standing with adjustable top leaf
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B19/00—Reading-desks; Lecterns; Pulpits, i.e. free-standing
- A47B19/10—Reading-desks; Lecterns; Pulpits, i.e. free-standing characterised by association with auxiliary devices, e.g. paper clamps, line indicators
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B9/00—Tables with tops of variable height
- A47B9/16—Tables with tops of variable height with means for, or adapted for, inclining the legs of the table for varying the height of the top, e.g. with adjustable cross legs
Abstract
The invention discloses a shear-type teacher's desk adopting a synchronous belt for lifting adjustment. The shear-type teacher's desk adopting the synchronous belt for lifting adjustment comprises a desk top and two shear-type extendable rods arranged below the desk top. The top ends of the two shear-type extendable rods are inlaid into a groove formed in the bottom end of the desk top, the bottom ends thereof are connected to ball screw nuts sleeving corresponding ball screws, a synchronous wheel is connected at one of the ends, on the same side, of the two ball screws, the two synchronous wheels are mounted coaxially, a drive device is connected with one of the two ball screws, the synchronous belt is connected between the two synchronous wheels, the two ball screws and the drive device are fixed on a bottom plate, and rolling wheels are arranged at the bottom peripheral end of the bottom plate. The shear-type teacher's desk adopting the synchronous belt for lifting adjustment has the advantages that adjusted through the ball screws, the shear-type extendable rods can be adjusted in height mechanically flexibly and can be compressed to fold, and accordingly the shear-type teacher's desk is convenient to carry and store; with the four rolling wheels, the shear-type teacher's desk is convenient and flexible to move, thereby meeting the requirements of mobile teaching and teaching interactivity nowadays and being highly practical and worthy of wide popularization.
Description
Technical field
The present invention relates to teaching facilities technical field, be specifically related to a kind of scissors dais using Timing Belt regulation lifting
Table.
Background technology
Along with the input of modern education is accelerated, increasing area starts to focus on education of middle and primary schools, and platform table is general
Being placed on the dais of teacher attends class for teacher puts the desk of the teaching aid such as textbook, chalk, is most basic in school instruction
One of teaching aid.At present, teacher is fixed platform table mostly, as in figure 2 it is shown, main by base, support bar, dais desktop
Composition, simple in construction, but have the disadvantage that one, base is not provided with roller, must need a dead lift can be by platform table
Mobile, inconvenient and laborious, it is impossible to meeting the needs that present smart is given lessons, support bar is the most uncontrollable simultaneously, it is impossible to
Look after the factor of teacher's height completely, when tall teacher says class hour, must bow and bend over to see the teaching material being placed on platform table, long
Phase so may cause cervical spondylosis etc., if short teacher is by article such as the chalks being placed on platform table, needs to stand on tiptoe
Foot or use aid and could realize, extremely inconvenient and painstaking；Its two, dais desktop is one piece of changeless desktop,
Closely give lessons guidance or the teaching request of needs cooperation suspension data can not be met, functional single, poor practicability.
Summary of the invention
The deficiency existed for prior art, the present invention provides a kind of scissors platform table using Timing Belt regulation lifting,
Can move and adjust height flexibly, and stable drive, mechanism performance are good, stability is high, Practical Performance is good.
In order to achieve the above object, the technical scheme that the present invention takes:
Using the scissors platform table of Timing Belt regulation lifting, including dais desktop, the lower section of described dais desktop is provided with two
Group scissors expansion link, in the top of two groups of scissors expansion links is all embedded in the groove offered desktop bottom, dais and scissors are stretched
The top of bar can in groove linear slide, the bottom of two groups of scissors expansion links is both connected on ball-screw nut, described rolling
Screw nut is sheathed on the ball-screw being connected with it, and two ball-screw homonymy one end are respectively connected with a synchronization wheel,
Two synchronization wheels are co-axially mounted and wherein a synchronization wheel connection has driving means, and two synchronize connection between wheel a Timing Belt, and two roll
Ballscrew and driving means are both secured on a base plate, and the bottom of this base plate surrounding is equipped with a roller.
As optimal technical scheme, in order to meet closely give lessons guidance or the teaching request of needs cooperation suspension data,
Possessing multifunctional performance, improve the practicality of platform table, desktop lower end, described dais offers groove, is provided with one in this groove
Draw-in groove Simple blackboard vertically can fixed it is provided with on rear side of Simple blackboard, and dais desktop.
As optimal technical scheme, in order to ensure that data can be stabilized in draw-in groove when Simple blackboard hangs data, thus
Improve the efficiency and the practicality of platform table given lessons, in described draw-in groove, be provided with an incision pin.
As optimal technical scheme, in order to make platform table mask have storage, dust collection function, ensure the whole of dais desktop simultaneously
Clean property and comfortableness, described platform table face includes left and right desktop, is provided with a slide plate, is provided with below this slide plate in described right desktop
One drawer that can deposit foreign material.
As optimal technical scheme, in order to make full use of space, the convenient thing taken out under slide plate in drawer simultaneously, favorably
Improve the practicality of platform table in entirety, in described left desktop, be provided with the slideway that slide plate slides can be allowed to left desktop.
As optimal technical scheme, in order to extract slide plate or drawer flexibly and easily out, article of can quickly taking, be conducive to giving lessons
Be smoothed out, on described slide plate, the side of drawer be equipped with draw ring.
As optimal technical scheme, use to meet the teaching of classroom, effectively utilize the sky of dais desk simultaneously
Between, it is provided with, in the front side of described dais desktop, the through hole that teacher's pointer can be placed.
Compared with prior art, the invention have the benefit that
1, scissors expansion link is set, changes present level and fix nonadjustable defect, and combine synchronization by ball-screw
Band is adjusted, and can the most mechanically adjust the height of platform table, the simultaneously compressible folding of scissors expansion link, change existing dais
The long-pending bigger defect of desk body, small and exquisite portable, conveniently carry and deposit；The bottom of base plate is provided with four rolling, changes existing dais
Table can only move the position of platform table flexibly and easily by carrying the defect of movement, meets current classroom instruction teacher flowing
The requirements such as teaching, interactive teaching and learning, simple and practical.
2, dais desktop arranges scientific and reasonable, changes the structure of existing only one piece of desktop that immobilizes, had both set up and can hang
Extension data or the Simple blackboard closely given lessons, meet and closely give lessons or the teaching request of needs suspension data, be simultaneously provided with
The slide plate that can extract out, drawer, may effectively utilize greatly dais desk space to the greatest extent, have several functions, and practicality is good.
Accompanying drawing explanation
With specific embodiment, the present invention is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of existing platform table；
Drawing reference numeral: 1, dais desktop, 1-1, groove, 1-2, Simple blackboard, 1-3, draw-in groove, 1-4, left desktop, 1-5, the right side
Desktop, 1-6, slide plate, 1-7, drawer, 1-8, slideway, 1-9, incision pin, 1-10, through hole, 2, scissors expansion link, 3, ball-screw
Nut, 4, ball-screw, 5, synchronize wheel, 6, driving means, 7, base plate, 8, roller, 9, Timing Belt, 10, service brake.
Detailed description of the invention
Propose one specific embodiment of the present invention as shown in Figure 1, use the scissors platform table of Timing Belt regulation lifting, including
In rectangular-shaped dais desktop 1, the lower section of described dais desktop 1 is provided with two groups of scissors expansion links 2, described scissors expansion link 2
Being hinged between cross-shaped motion bar and adjacent activities bar including organizing, the group of motion bar group is several to be made according to platform table more
The length of height combining movement bar rationally arrange, the present embodiment arranges the height of scissors expansion link 2 can rise to 1.6m, two groups
The top of scissors expansion link 2 is all embedded in interior and scissors expansion link 2 the top of the groove offered dais desktop 1 bottom can be recessed
Linear slide in groove, the bottom of two groups of scissors expansion links 2 is both connected on ball-screw nut 3, and described ball-screw nut 3 overlaps
Being located on the ball-screw 4 being connected with it, two ball screw nuts 3 of the most same group of scissors expansion link 2 connection are set in
On same ball-screw 4, two ball-screw 4 homonymy one end are respectively connected with a synchronization wheel 5, and two synchronize wheel 5 is co-axially mounted and wherein
One synchronizes wheel 5 connection driving means 6, and it is motor that the present embodiment arranges driving means 6, synchronizes wheel 5 by shaft coupling and motor
Output shaft connect, two synchronize to connect between wheel 6 have a Timing Belt 9, and two ball-screws 4 are both secured to one with driving means 6-1
On base plate 7, the present embodiment is arranged two ball-screws 4 and is all fixed on base plate 7 by a fixed block in triangular shape, driving means
6-1 is fixed on base plate 7 by a column, and the bottom of this base plate 7 surrounding is equipped with a roller 8, and the present embodiment arranges roller 8 and is
Universal wheel, it is ensured that can all-around mobile flexibly, it is ensured that in time and stably prevent the rolling of roller 8, it is ensured that the stability of platform table,
It is respectively connected with steel wire rope between homonymy two roller 8, two steel wire ropes is equipped with and can prevent the service brake 10 that roller 8 rolls.
Desktop 1 lower end, described dais offers groove 1-1, is provided with Simple blackboard 1-2, and dais in this groove 1-1
It is provided with the draw-in groove 1-3 that Simple blackboard 1-2 vertically can be fixed on rear side of desktop 1, Simple blackboard 1-2 can be fixed in draw-in groove 1-3
Meet and closely teach the requirement given lessons, or Simple blackboard 1-2 is hung drawing or other data be fixed on draw-in groove 1-3 in meet
Need to coordinate the teaching request of suspension data, possess multifunctional performance, improve the practicality of platform table.
An incision pin 1-9 it is provided with, in order to ensure that data can consolidate when Simple blackboard hangs data in described draw-in groove 1-3
In draw-in groove 1-3, thus improve the efficiency and the practicality of platform table given lessons,.
Described dais desktop 1 includes left desktop 1-4, right desktop 1-5, is provided with a slide plate 1-6 in described right desktop 1-5, should
It is provided with a drawer 1-7 that can deposit the foreign material such as chalk, eraser below slide plate 1-6, makes platform table mask have storage, dust merit
Can, ensure cleaning and the comfortableness of dais desktop 1 simultaneously.
It is provided with, in described left desktop 1-1, the slideway 1-8 that slide plate 1-6 can be allowed to slide into left desktop 1-1, slide plate is passed through slideway
Directly shift left desktop 1-1 onto, so that it may the article in drawer 1-7 of taking, it is not necessary to extracted out by slide plate 1-6, simple to operate, convenient taking-up
Thing in drawer 1-7, makes full use of the space of left desktop 1-1 simultaneously, is conducive to entirety to improve the practicality of platform table simultaneously.
On described slide plate 1-6, the side of drawer 1-7 be equipped with draw ring, the setting of draw ring can extract slide plate 1-6 flexibly and easily out
Or drawer 1-7, article of can quickly taking, be conducive to that gives lessons to be smoothed out.
Being provided with the through hole 1-10 that can place teacher's pointer in the front side of described dais desktop 1, teacher's pointer is that lecturer imparts knowledge to students conventional work
Tool, arranges the through hole 1-10 that can place teacher's pointer, and the teaching on the one hand meeting classroom uses, and effectively utilizes dais desk simultaneously
Space, improve platform table serviceability.
When the present invention uses:
Before platform table uses, being placed in by teacher's pointer in through hole 1-10, Simple blackboard 1-2 is placed in groove 1-1, chalk holder, powder
The conventional realia such as brush is placed in drawer 1-7, and driving means 6-1 switches on power.When using platform table, roller 8 can be passed through
Being moved to ideal position by platform table, foot steps on the service brake 10 on base plate 7, and roller 8 stops rolling, and teacher can be according to the height of oneself
Degree and custom adjust the height of scissors expansion link 2, if feeling, dais desktop 1 is the shortest or higher, start driving means 6,
Drive synchronization wheel 5 rotation connected with driving means 6, drive another to synchronize wheel 5 rotation by Timing Belt 9, so that two balls
Leading screw 4 rotates forward or backwards, and then makes two ball-screw nuts 3 thereon move towards or move dorsad, if two ball wires
Thick stick nut 3 moves towards, and scissors expansion link 2 extends, and i.e. raises the height of platform table, and ball-screw nut 3 moves dorsad,
Scissors expansion link 2 is compressed, and i.e. reduces the height of platform table, after the height adjustment of platform table to ideal height, closes and drives
Device 6；If instructional map needing suspension data or carrying out auxiliary by Simple blackboard 1-2 and give lessons, by Simple blackboard 1-2 from recessed
Groove 1-1 extracts out, fixes and can use in placing draw-in groove 1-3；If platform table uses complete, two balls on same ball-screw 4
Feed screw nut 3 moves to side dorsad, and two groups of scissors expansion links 2 compress folding completely, it is simple to carry and deposit.
Certainly, the most simply combine accompanying drawing the preferred embodiments of the disclosure to be described in detail, not with this
Limit the practical range of the present invention, the equivalence change that all principles under this invention, structure and structure are made, all should be covered by this
In the protection domain of invention.
Claims (7)
1. use the scissors platform table of Timing Belt regulation lifting, including dais desktop (1), it is characterised in that: described dais desktop
(1) lower section is provided with two groups of scissors expansion links (2), and the top of two groups of scissors expansion links (2) is all embedded in dais desktop (1) bottom
In the groove offered and scissors expansion link 2 top can in groove linear slide, the bottom of two groups of scissors expansion links (2) is equal
Being connected on ball-screw nut (3), described ball-screw nut (3) is sheathed on the ball-screw (4) being connected with it,
Two ball-screws (4) homonymy one end is respectively connected with synchronization wheel (5), and two synchronize wheel (5) is co-axially mounted and wherein one synchronizes wheel
(5) connection has driving means (6), and two synchronize to connect between wheel have a Timing Belt (9), two ball-screws (4) and driving means (6)
Being both secured on a base plate (7), the bottom of this base plate (7) surrounding is equipped with a roller (8).
The scissors platform table of employing Timing Belt the most according to claim 1 regulation lifting, it is characterised in that: described platform table
Face (1) lower end offers groove (1-1), and in this groove, (1-1) is provided with a Simple blackboard (1-2), and dais desktop (1) rear side
Being provided with can be by draw-in groove (1-3) the most fixing for Simple blackboard (1-2).
The scissors platform table of employing Timing Belt the most according to claim 2 regulation lifting, it is characterised in that: described draw-in groove
(1-3) an incision pin (1-9) it is provided with in.
The scissors platform table of employing Timing Belt the most according to claim 2 regulation lifting, it is characterised in that: described platform table
Face (1) includes left and right desktop (1-4,1-5), is provided with a slide plate (1-that can place the articles for use such as chalk in described right desktop (1-5)
6), this slide plate (1-6) lower section is provided with a drawer (1-7) that can deposit foreign material.
The scissors platform table of employing Timing Belt the most according to claim 4 regulation lifting, it is characterised in that: described left desktop
(1-4) slideway (1-8) that slide plate (1-6) can be allowed to slide into left desktop (1-4) it is provided with in.
The scissors platform table of employing Timing Belt the most according to claim 5 regulation lifting, it is characterised in that: described slide plate
(1-6) upper, the side of drawer (1-7) is equipped with draw ring.
7., according to the scissors platform table using Timing Belt regulation lifting described in claim 1～6 any one, its feature exists
In: it is provided with the through hole (1-10) that can place teacher's pointer in the front side at described dais desktop (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611001164.1A CN106308055A (en) | 2016-11-14 | 2016-11-14 | Shear-type teacher's desk adopting synchronous belt for lifting adjustment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611001164.1A CN106308055A (en) | 2016-11-14 | 2016-11-14 | Shear-type teacher's desk adopting synchronous belt for lifting adjustment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106308055A true CN106308055A (en) | 2017-01-11 |
Family
ID=57817124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611001164.1A Pending CN106308055A (en) | 2016-11-14 | 2016-11-14 | Shear-type teacher's desk adopting synchronous belt for lifting adjustment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106308055A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106963122A (en) * | 2017-04-28 | 2017-07-21 | 长乐圆明工业设计有限公司 | A kind of full-automatic tea table |
| CN110495711A (en) * | 2019-09-12 | 2019-11-26 | 中南林业科技大学 | A kind of intelligent desk and control method |
| CN111762729A (en) * | 2020-05-21 | 2020-10-13 | 国网江西省电力有限公司吉安供电分公司 | Supplementary crane that uses of power maintenance |
| CN112244546A (en) * | 2020-10-12 | 2021-01-22 | 浙江丹晨教育科技有限公司 | Skill training teaching device for retired soldier re-employment |
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| CN2118442U (en) * | 1992-04-18 | 1992-10-14 | 赵举明 | Lifting moveable multi-purpose cabinet for television and video recorder |
| CN201727074U (en) * | 2010-06-30 | 2011-02-02 | 高翔 | Convenient teacher desk |
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| CN202566953U (en) * | 2012-06-02 | 2012-12-05 | 王新杰 | Teacher's desk for teaching |
| CN202618792U (en) * | 2012-03-30 | 2012-12-26 | 广州物联家信息科技股份有限公司 | Lifting table top device and displayer all-in-one table comprising the same |
| CN203137482U (en) * | 2013-04-07 | 2013-08-21 | 于晓磊 | Multifunctional table for teacher |
| CN203762626U (en) * | 2014-03-26 | 2014-08-13 | 王佳 | Display board and teacher's desk for Russian teaching |
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| CN204292503U (en) * | 2014-11-28 | 2015-04-29 | 王欣笛 | A kind of computer desk |
| CN204908422U (en) * | 2015-09-11 | 2015-12-30 | 济南华北升降平台制造有限公司 | Two mesas study table |
| CN105193090A (en) * | 2014-06-20 | 2015-12-30 | 湖北理工学院 | Multifunctional teacher desk |
| CN205018529U (en) * | 2015-09-30 | 2016-02-10 | 卞江 | Over -and -under type workstation |
| CN206576532U (en) * | 2016-11-14 | 2017-10-24 | 钦州学院 | The scissors platform table of lifting is adjusted using timing belt |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2118442U (en) * | 1992-04-18 | 1992-10-14 | 赵举明 | Lifting moveable multi-purpose cabinet for television and video recorder |
| CN201727074U (en) * | 2010-06-30 | 2011-02-02 | 高翔 | Convenient teacher desk |
| CN201743211U (en) * | 2010-07-26 | 2011-02-16 | 孙小柱 | Teaching desk |
| CN202190937U (en) * | 2011-09-08 | 2012-04-18 | 徐晓兵 | Writing desk |
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| CN203913893U (en) * | 2014-04-29 | 2014-11-05 | 江汉大学 | A kind of portable dais |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106963122A (en) * | 2017-04-28 | 2017-07-21 | 长乐圆明工业设计有限公司 | A kind of full-automatic tea table |
| CN110495711A (en) * | 2019-09-12 | 2019-11-26 | 中南林业科技大学 | A kind of intelligent desk and control method |
| CN111762729A (en) * | 2020-05-21 | 2020-10-13 | 国网江西省电力有限公司吉安供电分公司 | Supplementary crane that uses of power maintenance |
| CN112244546A (en) * | 2020-10-12 | 2021-01-22 | 浙江丹晨教育科技有限公司 | Skill training teaching device for retired soldier re-employment |
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Application publication date: 20170111 |
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