CN107252186B - Mechanical three-leg automatic lifting table and adjusting method thereof - Google Patents
Mechanical three-leg automatic lifting table and adjusting method thereof Download PDFInfo
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- CN107252186B CN107252186B CN201710256386.6A CN201710256386A CN107252186B CN 107252186 B CN107252186 B CN 107252186B CN 201710256386 A CN201710256386 A CN 201710256386A CN 107252186 B CN107252186 B CN 107252186B
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- transmission shaft
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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
- A47B9/00—Tables with tops of variable height
- A47B9/12—Tables with tops of variable height with flexible height-adjusting means, e.g. rope, chain
Abstract
The invention discloses a mechanical three-leg automatic lifting table and an adjusting method thereof. The lifting table comprises a table top plate, a table box and three table legs; each desk leg comprises a fixed leg and a lifting leg which is arranged on the fixed leg and can lift; the table box and/or the table top plate are/is fixed at the top ends of the lifting legs; the top of each lifting leg is provided with a rope winding wheel fixedly arranged in the table box, the bottom of each lifting leg is provided with a movable pulley fixedly arranged in the lifting leg, and a rope with one end wound on the rope winding wheel and the other end wound on the movable pulley and then fixed at the top of the fixed leg is arranged in the same lifting leg; a first transmission shaft and a second transmission shaft are arranged in the table box, a rope winding wheel is arranged at the outer end of the first transmission shaft, rope winding wheels are arranged at the outer end and the inner end of the second transmission shaft, and the inner end of the first transmission shaft and the inner end of the second transmission shaft are in meshing transmission through a bevel gear mechanism; the table box is provided with a driving mechanism for driving the first transmission shaft and/or the second transmission shaft to rotate. The invention has the advantages of stable lifting, good synchronism and large desktop space, and is very suitable for business office.
Description
Technical Field
The invention relates to a mechanical three-leg automatic lifting table and an adjusting method thereof.
Background
With the improvement of the social and economic living standard, the requirements of people on the convenience and the comfort of the table are higher and higher. The desk has high cost performance and stable transmission, and the height of the desk can be automatically adjusted to be favored by consumers.
The types of automatic lifting tables in the existing market are mainly mechanical and electric, and most of the automatic lifting tables in the existing market are mainly two-leg lifting tables. The electric lifting table is high in cost and inconvenient to move due to the fact that a fixed power supply is needed, and the electric lifting table is inconvenient for a user.
The mechanical lifting table is stable in transmission, but the existing types are few, the table parts are various and difficult to assemble, and the weight of some tables is too large. The common lifting table is based on the appearance of a desk in a common classroom and is provided with a plurality of simple telescopic lifting structures, so that the defects of narrow space of the table top, unstable lifting, difficult operation during lifting, high labor intensity in the adjusting process, poor adjusting precision, complex process, lack of corresponding automation and mechanization and the like exist, and the common lifting table is not suitable for business office work.
Disclosure of Invention
The invention aims to provide a mechanical three-leg automatic lifting table and an adjusting method thereof.
In order to achieve the purpose, the invention adopts the technical scheme that:
a mechanical three-leg automatic lifting table comprises a table top plate, a table box and three table legs; each desk leg comprises a fixed leg and a lifting leg which is arranged on the fixed leg and can lift; the table box and/or the table top plate are/is fixed at the top ends of the lifting legs; the structure is characterized in that:
the top of each lifting leg is provided with a rope winding wheel fixedly arranged in the table box, the bottom of each lifting leg is provided with a movable pulley fixedly arranged in the lifting leg, and a rope with one end wound on the rope winding wheel and the other end wound on the movable pulley and then fixed at the top of the fixed leg is arranged in the same lifting leg;
a first transmission shaft and a second transmission shaft are arranged in the table box, a rope winding wheel is arranged at the outer end of the first transmission shaft, rope winding wheels are arranged at the outer end and the inner end of the second transmission shaft, and the inner end of the first transmission shaft and the inner end of the second transmission shaft are in meshing transmission through a bevel gear mechanism;
the table box is provided with a driving mechanism for driving the first transmission shaft and/or the second transmission shaft to rotate;
the table box is provided with a locking device for preventing the first transmission shaft and/or the second transmission shaft from rotating;
the locking device comprises a horizontal pulling plate used for locking a first transmission shaft or a second transmission shaft, an inclined plane is arranged on the horizontal pulling plate, an upper cover plate fixed on a lower bottom plate of the table box through an upright post is arranged above the horizontal pulling plate, a movable plate is arranged above the horizontal pulling plate, an elastic element is arranged between the movable plate and the upper cover plate, and the elastic element locks or unlocks the first transmission shaft or the second transmission shaft when the horizontal pulling plate moves in a reciprocating manner; the horizontal pulling plate is connected with the locking switch through a pulling rope;
the inclined plane is arranged at the side end of the horizontal pulling plate, the side end of the movable plate is correspondingly provided with a bulge, the bulge is positioned above the inclined plane of the horizontal pulling plate, and the bulge is matched with the inclined plane to drive the movable plate to ascend or descend.
Therefore, the first transmission shaft and/or the second transmission shaft are driven to rotate by the driving mechanism, and the three lifting legs can be ensured to be lifted synchronously by the synchronization of the bevel gear mechanism.
According to the embodiment of the invention, the invention can be further optimized, and the following is the technical scheme formed after optimization:
preferably, according to the utility model discloses an embodiment, actuating mechanism is the suit at the epaxial torsional spring of first transmission shaft and/or secondary drive, and the stiff end of this torsional spring is installed on the bearing frame of first transmission shaft and/or secondary drive axle, and the end that twists reverse of this torsional spring is used for twisting the drive first transmission shaft and/or secondary drive axle rotate. The torsion end of the torsion spring is used for adjusting the driving force.
And the first transmission shaft and/or the second transmission shaft are/is provided with a threaded section, the threaded section is provided with a plurality of nuts, the first nut is used for locking the second nut, and the second nut is used for being connected with the torsion end of the torsion spring. The second nut is connected to the torsional end of the torsion spring for adjusting the initial torsional force.
The lower end surface of the horizontal pulling plate forms a groove, and the upper end surface of the lower bottom plate is provided with a groove matched with the groove of the horizontal pulling plate to form a friction hole.
The horizontal pulling plate is connected with the locking switch through a steel wire rope.
And a sliding rail is arranged between the lifting leg and the fixed leg.
Based on the same inventive concept, the invention also provides a method for heightening the mechanical three-leg automatic lifting table, wherein the driving mechanism is a torsion spring sleeved on the first transmission shaft and/or the second transmission shaft, the fixed end of the torsion spring is arranged on a bearing seat of the first transmission shaft and/or the second transmission shaft, and the torsion end of the torsion spring is used for driving the first transmission shaft and/or the second transmission shaft to rotate in a torsion mode; the method for height adjustment of the mechanical three-leg automatic lifting table comprises the following steps:
s1, opening the brake mechanism, and driving the first transmission shaft and/or the second transmission shaft to rotate by the torsion spring under the drive of releasing energy stored in advance by the torsion spring;
s2, the first transmission shaft and the second transmission shaft are meshed through a bevel gear mechanism for synchronous transmission, and the rope winding wheel rotates synchronously;
and S3, the rope is wound on the corresponding rope winding wheel, so that the movable pulley and the lifting leg are driven to move upwards along the fixed leg, the table top is lifted, and when the table top is lifted to a specified height, the brake mechanism is closed, and the table top is stable and immovable.
Based on the same inventive concept, the invention also provides a method for lowering the mechanical three-leg automatic lifting table, which comprises the following steps: the brake mechanism is opened, the user enables the lifting legs to descend by pressing the tabletop downwards, the tabletop is lowered, the rope is discharged around the corresponding rope winding wheel in a reverse rotating mode, the movable pulley drives the rope and the lifting legs to move downwards along the fixed legs, when the tabletop is lowered to the designated height, the brake mechanism is closed, and the tabletop is stable and immovable.
The invention provides a mechanical three-leg automatic lifting table which comprises a table top, a table box, a fixed leg and a lifting leg. The lifting box is characterized in that the number of the fixed legs and the number of the lifting legs are three respectively, the fixed legs are arranged at the lowest ends of the left, middle and right table legs of the table box, the lifting legs are connected with the fixed legs through steel wire ropes, and the box body and the lifting legs are fixed through screw connection.
The table box part comprises a transmission shaft, a bevel gear, a torsion spring, a rope winding wheel, a locking mechanism, a locking switch, an adjusting nut and a bearing seat. The transmission shaft is provided with a torsional spring for providing a power source, one end of each of two ends of the transmission shaft is provided with a bevel gear, the other end of each of the two ends of the transmission shaft is provided with a rope winding wheel, and a steel wire rope is arranged on the rope winding wheel; the table box is internally provided with a locking device, the locking device locks the transmission shaft under the action of the elastic force of the spring, the locking device can be adjusted through the locking switch, when the locking switch is opened, the locking device does not act any more, and the transmission shaft can rotate.
The fixed leg is connected with the lifting leg through a steel wire rope, one end of the steel wire rope is installed on the rope winding wheel, and the other end of the steel wire rope is fixed on the hanging buckle on the fixed leg through the movable pulley.
Compared with the prior art, the invention has the beneficial effects that: the mechanical lifting table has the characteristics of reducing cost, reducing the number of parts, improving assembly efficiency, being easy to modularize and being convenient to move.
Compared with an electric lifting table, the three-leg lifting table has the advantages of convenience in moving, stability in lifting and large table top space compared with a common mechanical lifting table, and is very suitable for business office.
Drawings
FIG. 1 is a general schematic view of an embodiment of a mechanical three-legged lift table of the present invention;
FIG. 2 is a schematic view of the internal structure of the case of the mechanical three-legged lifting table of the present invention;
FIG. 3 is a schematic view of the connection between the fixed leg and the lifting leg of the mechanical three-leg lifting table of the present invention;
FIG. 4 is a schematic view of a synchronizing mechanism of the mechanical three-legged elevating table of the present invention;
fig. 5 is a schematic structural view of the table locking device of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence between the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.
A mechanical three-leg automatic lifting table is shown in figure 1 and comprises 3 fixed legs 4, 1 table top plate 1, 3 lifting legs 3 and 1 table box 2. Wherein the table box 2 and the lifting legs 3 are connected and fixed through screws and can also be welded. The lifting legs 3 are sleeved inside the fixed legs 4.
As shown in fig. 2, three rope winding wheels 5, two bearing seats 6, two torsion springs 7, four adjusting nuts 8, a first transmission shaft 9, two bevel gears 10, a locking device 11, a second transmission shaft 21 and a locking switch 12 are arranged in the table box. The fixed end of the torsion spring 7 is arranged on the bearing seat 6, the fixed end is arranged on the adjusting nut 8, the adjusting nut 8 is in threaded connection with the transmission shaft, and in order to prevent the adjusting nut 8 from unwinding under the action of the torsion spring 7, two adjusting nuts 8 are arranged side by side in the invention, one adjusting nut is used for installing the torsion spring to prevent the torsion spring from rotating, and the other adjusting nut is responsible for stopping. When the torsion spring 7 is twisted, the adjusting nut 8 is driven to rotate, and energy storage is further realized. The bearing block is provided with a bearing so that the first transmission shaft 9 can rotate. One end of the first transmission shaft 9 is provided with a rope winding wheel 5, and the other end is provided with a bevel gear 10; the second transmission shaft 21 has a rope winding wheel 5 at one end and a rope winding wheel 5 and a bevel gear 10 at the other end. In order to ensure the synchronism of the three table legs, the identical bevel gears 10 are arranged at the two ends of the two transmission shafts 9 and 21 and ensure the complete matching, so that the synchronism of the two transmission shafts can be ensured in the actual working process.
As shown in fig. 3, the rope winding wheels 5 are respectively installed on the first transmission shaft 9 and/or the second transmission shaft 21; the steel wire rope 13 can be wound, and the steel wire rope 13 is wound around a movable pulley 15 arranged on the lifting leg and fixed on a hanging buckle 14. When the table top 1 descends, the lifting legs 3 descend along with the table top 1, the movable pulleys 15 arranged at the lower ends of the lifting legs are forced to descend, the steel wire ropes 13 are wound on the movable pulleys 15, one ends of the steel wire ropes 13 are fixed on the hanging buckles 14, and the hanging buckles 14 are fixed on the fixed legs 4 and cannot move, at this time, only the other ends of the steel wire ropes 13 can be driven to move, the other ends of the steel wire ropes 13 are wound on the rope winding wheel 5, at this time, the rope winding wheel 5 is forced to rotate, the steel wire ropes 13 wound on the rope winding wheel 5 are released, the transmission shafts 9 and 21 are driven to rotate, the torsion springs 7 are further enabled to twist to store energy, and meanwhile, the two transmission shafts 9 and 21 are enabled.
As shown in the schematic diagram of the mechanical three-leg lifting table synchronizing mechanism in fig. 4, the synchronizing mechanism is composed of two identical bevel gears 10, and the synchronization of the transmission of the two transmission shafts 9 and 21 is ensured by the meshing of the bevel gears.
As shown in fig. 5, the locking device of the mechanical three-legged lifting table comprises a locking switch 12, a wire rope 13, a horizontal pulling plate 16, an upper cover plate 17, a compression spring 18, a movable plate 19 and a lower plate 20. In the locking device, a movable plate 19 can move up and down between an upper cover plate 17 and a horizontal pulling plate 16, and a compression spring 18 is arranged between the movable plate 19 and the upper cover plate 17. The horizontal pulling plate 16 and the movable plate 19 are limited because four upright posts fixed on the lower bottom plate 20 are shown, the horizontal pulling plate 16 can move in the horizontal direction and is provided with a slope, and the movable plate 19 is provided with four protruding parts which just can move on the slope. Under the normal state, under the action of the compression spring, the movable plate 19 is always at the lowest end of the movable position, when the knob at one end of the locking switch 12 is rotated, the locking switch drives the upper steel wire rope 13 to move, and the steel wire rope 13 drives the horizontal pulling plate 16 to move, so that the movable plate 19 is driven to move along the vertical direction. Because the movable plate 19 is provided with a semicircular groove below to press the second transmission shaft 21, when the movable plate moves upward, the transmission shaft 21 is loosened to rotate, and the other transmission shaft 9 is driven to rotate, thereby realizing energy storage and energy release.
The adjusting method of the three-leg automatic lifting table comprises the following steps:
when the desktop is at the top, need open locking device, rotatory locking switch 12, at this moment transmission shaft 9, 21 will be rotatable, rely on external force (artificially pressing) simultaneously, force desktop 1 to descend, movable pulley 15 of 3 lower extremes installations of lift leg can force wire rope 13 downwards this moment, wire rope 13 will drive around rope sheave 5 rotatory messenger around the wire rope 13 release on rope sheave 5, the rotation of rope sheave 15 will drive transmission shaft 9, 21 is rotatory, at this moment, transmission shaft 9, 21 can drive torsional spring 7 of installing on transmission shaft 9, 21 and twist reverse the energy storage. When lowered to the proper position, the table can be stopped at the desired position by releasing the lock switch 12.
When the table top is at the lowest end, the locking device is loosened, the locking switch 12 is rotated, the transmission shafts 9 and 21 can rotate, the transmission shafts 9 and 21 rotate under the action of the torsion spring 7 to drive the rope winding wheel 5 at the end of the transmission shaft to rotate, so that the steel wire rope 13 is wound on the rope winding wheel 5, the lifting leg 3 is driven to ascend along with the shortening of the steel wire rope 13, and the process is the reverse process of descending. When raised to the proper position, the table can be stopped at the desired position by releasing the locking switch 12.
In order to ensure that enough torque can be provided for the torsion spring 7 at the beginning, the adjusting nut 8 capable of adjusting the pretightening force is specially arranged, a port is formed in the corresponding position below the table box so as to be adjusted timely, and in order to ensure that the adjusting nut cannot slide in the lifting process of the table, the adjusting nut simultaneously installs two nuts, wherein the former nut is responsible for installing one end of the torsion spring 7, and the other nut is responsible for stopping.
The foregoing examples are set forth to illustrate the present invention more clearly and are not to be construed as limiting the scope of the invention, which is defined in the appended claims to which the invention pertains, as modified in all equivalent forms, by those skilled in the art after reading the present invention.
Claims (7)
1. A mechanical three-leg automatic lifting table comprises a table top plate (1), a table box (2) and three table legs; each desk leg comprises a fixed leg (4) and a lifting leg (3) which is arranged on the fixed leg (4) and can be lifted; the table box (2) and/or the table top plate (1) are/is fixed at the top ends of the lifting legs (3); the method is characterized in that:
the top of each lifting leg (3) is provided with a rope winding wheel (5) fixedly arranged in the table box (2), the bottom of each lifting leg (3) is provided with a movable pulley (15) fixedly arranged in the lifting leg (3), and a rope (13) is arranged in the same lifting leg (3), wherein one end of the rope is wound on the rope winding wheel (5), and the other end of the rope is wound on the movable pulley (15) and then fixed at the top of the fixed leg (4);
a first transmission shaft (9) and a second transmission shaft (21) are arranged in the table box (2), a rope winding wheel (5) is arranged at the outer end of the first transmission shaft (9), the rope winding wheel (5) is arranged at the outer end and the inner end of the second transmission shaft (21), and the inner end of the first transmission shaft (9) and the inner end of the second transmission shaft (21) are in meshing transmission through a bevel gear mechanism;
the table box (2) is provided with a driving mechanism for driving the first transmission shaft (9) and/or the second transmission shaft (21) to rotate;
the table box (2) is provided with a locking device for preventing the first transmission shaft (9) and/or the second transmission shaft (21) from rotating;
the locking device comprises a horizontal pulling plate (16) used for locking a first transmission shaft (9) or a second transmission shaft (21), an inclined surface is arranged on the horizontal pulling plate (16), an upper cover plate (17) fixed on a lower bottom plate (20) of the table box (2) through an upright post is arranged above the horizontal pulling plate (16), a movable plate (19) is arranged above the horizontal pulling plate (16), an elastic element is arranged between the movable plate (19) and the upper cover plate (17), and the elastic element locks or unlocks the first transmission shaft (9) or the second transmission shaft (21) when the horizontal pulling plate (16) moves in a reciprocating mode; the horizontal pulling plate (16) is connected with the locking switch (12) through a pulling rope;
the inclined plane is arranged at the side end of the horizontal pulling plate (16), the side end of the movable plate (19) is correspondingly provided with a bulge, the bulge is positioned above the inclined plane of the horizontal pulling plate (16), and the bulge and the inclined plane are matched to drive the movable plate (19) to ascend or descend.
2. The mechanical three-leg automatic lifting table according to claim 1, wherein the driving mechanism is a torsion spring (7) sleeved on the first transmission shaft (9) and/or the second transmission shaft (21), the fixed end of the torsion spring (7) is mounted on the bearing seat (6) of the first transmission shaft (9) and/or the second transmission shaft (21), and the torsional end of the torsion spring (7) is used for driving the first transmission shaft (9) and/or the second transmission shaft (21) to rotate in a torsional mode.
3. A mechanical three-legged automatic lifting table according to claim 2, characterized in that the first transmission shaft (9) and/or the second transmission shaft (21) are provided with a threaded section, on which a plurality of nuts are mounted, of which a first nut is used to lock a second nut, which is connected to the torsion end of the torsion spring (7).
4. The mechanical three-legged automatic lifting table according to claim 1, wherein the lower end surface of the horizontal pulling plate (16) is formed with a groove, and the upper end surface of the lower base plate (20) is provided with a groove which is matched with the groove of the horizontal pulling plate (16) to form a friction hole.
5. Mechanical three-legged automatic lifting table according to claim 1, characterized in that sliding rails are provided between the lifting legs (3) and the fixed legs (4).
6. A method for lifting the mechanical three-legged automatic lifting table according to any one of claims 1 to 5, wherein the driving mechanism is a torsion spring (7) fitted around the first transmission shaft (9) and/or the second transmission shaft (21), the fixed end of the torsion spring (7) is mounted on the bearing seat (6) of the first transmission shaft (9) and/or the second transmission shaft (21), and the torsional end of the torsion spring (7) is used for driving the first transmission shaft (9) and/or the second transmission shaft (21) to rotate; the method for height adjustment of the mechanical three-leg automatic lifting table comprises the following steps:
s1, opening the brake mechanism, and driving the first transmission shaft (9) and/or the second transmission shaft (21) to rotate by the torsion spring under the drive of releasing energy stored in the torsion spring in advance;
s2, the first transmission shaft (9) and the second transmission shaft (21) are meshed through a bevel gear mechanism for synchronous transmission, and the rope winding wheel (5) rotates synchronously;
s3, the rope (13) is wound on the corresponding rope winding wheel (5), so that the movable pulley (15) and the lifting leg (3) are driven to move upwards along the fixed leg (4), the table top is lifted, when the table top is lifted to a designated height, the brake mechanism is closed, and the table top is stable and immovable.
7. A method of lowering a mechanical three-legged automatic table as claimed in any one of claims 1 to 5, comprising the steps of: the braking mechanism is opened, the user enables the lifting legs to descend by pressing the tabletop down, the tabletop is lowered, the rope (13) is discharged around the corresponding rope winding wheel (5) in a reverse rotating mode, the movable pulley (15) drives the rope (13) and the lifting legs (3) to move downwards along the fixed legs (4), when the tabletop is lowered to the designated height, the braking mechanism is closed, and the tabletop is stable and immovable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710256386.6A CN107252186B (en) | 2017-04-19 | 2017-04-19 | Mechanical three-leg automatic lifting table and adjusting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710256386.6A CN107252186B (en) | 2017-04-19 | 2017-04-19 | Mechanical three-leg automatic lifting table and adjusting method thereof |
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| Publication Number | Publication Date |
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| CN107252186A CN107252186A (en) | 2017-10-17 |
| CN107252186B true CN107252186B (en) | 2020-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710256386.6A Active CN107252186B (en) | 2017-04-19 | 2017-04-19 | Mechanical three-leg automatic lifting table and adjusting method thereof |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107890202B (en) * | 2017-11-14 | 2020-07-03 | 杭州华育教学设备有限公司 | Lifting locking device for table and chair legs |
| CN108523415A (en) * | 2018-05-28 | 2018-09-14 | 绍兴康拓传动科技有限公司 | A kind of more leg electric rotary table frame |
| CN108741625A (en) * | 2018-06-28 | 2018-11-06 | 浙江乐歌智能驱动科技有限公司 | A kind of rotary booster engine structure and its same table of application |
| CN109315925A (en) * | 2018-10-18 | 2019-02-12 | 江苏捷尔特智能气动系统有限公司 | Synchronous lifting mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2168469Y (en) * | 1993-07-27 | 1994-06-15 | 陶德庆 | Table lifting controller |
| DE102010060153B3 (en) * | 2010-10-25 | 2012-02-02 | Veyhl Gmbh | Pivotable shaft arrangement for supporting device of e.g. seating furniture, has multiple winding sections axially arranged one after another on rotary shaft and comprising different cross-sections |
| CN201920037U (en) * | 2011-01-27 | 2011-08-10 | 珠海励致洋行办公家私有限公司 | Electric lifting office table |
| CN202739201U (en) * | 2012-04-18 | 2013-02-20 | 北京市丽日办公用品有限责任公司 | Hand-operated lifting table for calligraphy |
| EP3035821B1 (en) * | 2013-08-19 | 2018-03-14 | Ergotron, Inc. | Height adjustable desk system and method |
| CN204889113U (en) * | 2015-07-27 | 2015-12-23 | 苏州卫生职业技术学院 | Liftable formula workstation |
| CN105231661B (en) * | 2015-11-17 | 2018-02-27 | 上海腾飞通讯器材实业有限公司 | Hand-operated lifting table |
| CN105326213B (en) * | 2015-11-23 | 2018-03-09 | 上海腾飞通讯器材实业有限公司 | Electric elevatable table |
| CN105901921A (en) * | 2016-07-12 | 2016-08-31 | 张传开 | Desk with manually adjustable height |
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