TWM545511U - Adjustable lifting table structure - Google Patents

Description

Adjustable lifting table structure

The present invention provides an adjustable lifting table structure, in particular, a support mechanism is pivotally connected to the support at two sides of the bottom surface of the table, and the first sliding of the adjusting device is located in the support by the link mechanism. a rack gear and a second sliding rack, and a central gear of the locking portion is engaged between the first sliding rack and the second sliding rack, so that the handle of the operating portion can be pulled to drive the engaging member away from the central gear to form an unlocked state. Then, the central sliding gear drives the first sliding rack and the second sliding rack to reversely shift, so that the table is synchronously moved up and down.

According to the table, the use of tables in today's office, home life, school or workstation is very common, and different types of tables have different application methods, such as computer desks, work desks, desks, folding tables, dining tables, etc., in order to provide users with more Large-area desktops are available. In addition to telescopic desktops, the general table is also a popular choice. The folding table is free to open and close, and is not limited by volume and space. It is easy to move and light. The advantages of the table body, etc., so the folding table is widely used by users.

Moreover, the length and width of the table currently on the market are both predetermined size and height. There are certain specifications. Although it can be applied to users of general size, it will be slightly used by users with higher or slightly shorter heights. Inadequate, even if there is a seat with adjustable lift height that can be used with the height of the table, the height of the lift that can be adjusted by the seat is limited and difficult to apply. Tables of various heights, for users with large differences in body size, will cause a lot of inconvenience in use.

Because people use tables and chairs for a long time in their daily life, sitting in the seat for a long time can cause pain in the back and neck, and cause heart rate, metabolic rate, insulin availability and high cholesterol levels to decrease, making cardiovascular disease The incidence of depression and diabetes will increase significantly. Therefore, in order to reduce the risk of obesity, improve metabolic problems and cardiovascular diseases, in recent years, there has been a boom in standing work, and more importantly, standing in addition to being healthy. In addition, it can improve work efficiency and productivity, so the work table with adjustable desktop height comes into being, to meet the needs of standing at work or work. In addition, most types of tables on the market currently have fixed dimensions that cannot be changed. Even if the table can be freely opened and closed for easy movement and storage, if the height of the table cannot be adjusted according to the size or needs of different users, the user's body or limbs may be rendered improperly posture, less ergonomic, or even necessary. The user changes the structural design of the table, and there are still many in practical applications. Loss and inconvenience, that is engaged in the research industry are anxious to improve the key lies here.

Therefore, in view of the above-mentioned problems and shortcomings, the new creators have collected and reviewed relevant materials through various evaluations and considerations, and have used the trial and modification of many years of R&D experience in this industry to start with such adjustable lifting table structure. A new type is born.

The main purpose of the present invention is that the first link group and the second link group of the link mechanism are respectively pivotally connected to the first shaft portion and the second shaft portion on the support at the two sides of the bottom surface of the table top, and a first sliding rack and a second sliding rack, wherein the first connecting rod and the second connecting rod of the first connecting rod group and the second connecting rod group are respectively pivotally connected with the adjusting device in the sliding space of the supporting base, and a sliding rack with A central gear of the locking portion is engaged between the second sliding rack, and an operating portion is coupled to the locking portion, and the operating portion includes a handle and a clamping member for clamping the central gear to form a locked state, and is pulled upward by the handle At this time, the interlocking card member is separated from the central gear to form an unlocked state, and then the table is pressed or lifted to drive the first link group and the second link group to be unfolded or folded, and the first gear is driven by the central gear. The sliding rack and the second sliding rack are respectively displaced in opposite directions, so that the table can be synchronously moved up and down, thereby achieving the effects of stable structure and easy operation.

The secondary purpose of the present invention is that the adjusting device is respectively assembled on the support at the two sides of the bottom surface of the table, and can be operated by the operating portion and the driven link mechanism can be respectively operated by pressing or lifting the table. When the two sets of the first link group and the second link set of the link mechanism are deployed or folded, the first sliding rack and the second sliding rack of the linkage adjusting device are located at the support. The movement of the sliding space relative to the inward or outward sliding movement, and the displacement of the first sliding rack and the second sliding rack respectively in the opposite direction by the central gear of the locking portion can shorten the first link group and the second connection The half of the rod group's displacement stroke speeds up the simultaneous movement of the table and the height of the table, allowing the user to easily and quickly adjust the height of the table.

Another purpose of the creation is to release the handle of the operating portion when the table is adjusted to an appropriate height position, and the reset torsion spring is coupled with the buffer body to rotate and reset the handle, so as to interlock the movement of the card. The portion is rotated upward to catch the center gear to form a locked state, and the stopping portion is located in the card slot of the base frame, and can also extend upward into the positioning hole of the limiting rail frame to form a clamping position, so that the central gear is subjected to the clamping member. The restriction can not be rotated, and the first sliding rack and the second sliding rack can be prevented from being along the limiting rail of the support by the central gear clamping the teeth of the first sliding rack and the second sliding rack The sliding displacement is such that the first link set and the second link set are stably supported by the table to be positioned at a predetermined height position.

1‧‧‧Table board

11‧‧‧Support

110‧‧‧Sliding space

111‧‧‧Limited rail

1111‧‧‧ top board

1112‧‧‧ Sidewall panels

1113‧‧‧rail plate

1114‧‧‧Mounting holes

1115‧‧‧Positioning holes

112‧‧‧First shaft

113‧‧‧Second shaft

114‧‧‧First track slot

115‧‧‧Second rail slot

12‧‧‧ ‧ boards

121‧‧‧ Telescopic slides

13‧‧‧Sub-table

2‧‧‧ linkage mechanism

21‧‧‧First Link Group

211‧‧‧first foot

212‧‧‧First pole

22‧‧‧Second linkage

221‧‧‧Second foot

222‧‧‧Second pole

23‧‧‧Base

231‧‧‧foot frame

2311‧‧‧First shaft

2312‧‧‧Second shaft

2313‧‧‧torsion spring

232‧‧‧ cover

233‧‧‧ Connecting rod

24‧‧‧crossbar

3‧‧‧Adjustment device

31‧‧‧First sliding rack

311‧‧‧ teeth

3111‧‧‧ linkage film

312‧‧‧First guide

3121‧‧‧Roller

313‧‧‧Sliding wheel body

32‧‧‧Second sliding rack

321‧‧‧ teeth

3211‧‧‧ linkage film

322‧‧‧Second guide

3221‧‧‧Roller

323‧‧‧Sliding wheel body

33‧‧‧Locking Department

331‧‧‧ pedestal

3310‧‧‧ accommodating space

3311‧‧‧ side panels

3312‧‧‧First shaft hole

3313‧‧‧ lugs

3314‧‧‧Second shaft hole

3315‧‧‧ card slot

332‧‧‧Center gear

3321‧‧‧through hole

333‧‧‧ pivotal components

3331‧‧‧ Stud

3332‧‧‧Washers

3333‧‧‧ screws

34‧‧‧Operation Department

341‧‧‧Handle

3411‧‧‧ shaft

3412‧‧‧Reset torsion spring

342‧‧‧Card parts

3421‧‧‧stops

3422‧‧‧Resistance Department

3423‧‧‧Perforation

343‧‧‧ buffer

3431‧‧‧Pushing rod

3432‧‧ ‧ spring

3433‧‧‧ Nuts

The first picture is a three-dimensional appearance of the creation.

The second picture is a three-dimensional appearance of another perspective of the creation.

The third figure is a partial stereoscopic view of the creation.

The fourth figure is an exploded view of the creation of the linkage mechanism and the adjustment device.

The fifth figure is an exploded view of another perspective of the creation of the linkage mechanism and the adjustment device.

The sixth figure is an exploded perspective view of the locking portion and the operating portion of the creation adjustment device.

The seventh figure is a side cross-sectional view of the creation before the adjustment.

The eighth figure is a partial enlarged view before the adjustment of the creation.

The ninth figure is a partial enlarged view of the original adjustment.

The tenth figure is a partial stereoscopic appearance of the original adjustment.

The eleventh figure is a side profile view of the original adjustment.

The twelfth figure is a schematic diagram of the action of the creative folding mode.

In order to achieve the above objectives and effects, the technical means and its construction adopted in the present invention are described in detail in the preferred embodiment of the present invention, and the structure and function are as follows.

Please refer to the first, second, third, fourth, fifth and sixth figures, which are respectively the three-dimensional appearance of the creation, the three-dimensional appearance of another perspective, the partial three-dimensional appearance, the three-dimensional decomposition of the linkage mechanism and the adjustment device. An exploded perspective view of the view and another perspective view, and an exploded view of the locking portion and the operating portion of the adjusting device, as can be clearly seen from the figure, the adjustable lifting table structure of the present invention is a package The table board 1 , the link mechanism 2 and the adjusting device 3 are included, wherein:

The bottom and bottom sides of the table 1 are provided with a support 11 along the short side direction, and respectively have a limit rail 111 on the second support 11, and each of the limit rails 111 has a top plate 1111 A side wall plate 1112 extending downward is disposed at a side thereof, and a horizontal rail plate 1113 which is oppositely turned inward is disposed at a lower portion of the second side wall plate 1112, and a mounting hole 1114 is defined at a center of the top plate 1111 of the limiting rail frame 111. An elongated positioning hole 1115 is disposed around the mounting hole 1114, and a sliding space 110 is formed between the top plate 1111, the side wall plate 1112 and the inside of the rail plate 1113. Further, the limiting rail frame 111 is located before and after the two side wall plates 1112. The diagonal position of the square is respectively provided with the first shaft portion 112 and the second shaft portion 113, and the first rail is respectively disposed at the other side of the second side wall plate 1112 away from the first shaft portion 112 and the second shaft portion 113. The slot 114 and the second rail slot 115, and the first rail slot 114 and the second rail slot 115 are respectively extended laterally from the central position of the side wall panel 1112 to another diagonal position; further, the second seat 11 of the table 1 is located The limiting rail frame 111 is provided with a downwardly extending frame plate 12 at the inner side and a phase below the two frame plates 12. The lateral telescopic slides 121 and two horizontal telescopic assembly of the sub-rail 121 between the top plate 13, for the sub-plate 13 is movable relative to the table top plate 1 for drawing the collapsed or actions.

The link mechanism 2 includes two sets of a first link set 21 and a second link set 22 which are respectively assembled under the support 11 to form a left-right opposite arrangement, and are respectively provided in each set of the first link set 21 The first leg 212 is pivotally connected to the center of the first leg 112. The first leg 212 is pivotally connected to the first shaft 112 of the support 11 at the other side of the first leg 211. The second leg 221 of the second link set 22 has a second strut 222 pivotally connected to the central position, and the second strut 222 is opposite to the second leg 22 of each second strut 222. The other side of the first leg 211 and the second leg 221 are formed to be formed in a front-rear direction.

Furthermore, the two sets of the first link group 21 and the second link set 22 of the link mechanism 2 are respectively assembled with parallel bases 23, and are disposed on the front and rear sides of the foot frame 231 of the second base 23 The first shaft 2311 and the second shaft 2312 for pivotally connecting the first leg 211 and the second leg 221 are disposed transversely, and the first shaft 2311 and the second shaft 2312 are respectively sleeved. There is a torsion spring 2313, the two end pins of the torsion spring 2313 are respectively abutted against the foot frame 231, and the first leg bar 211 or the second leg bar 221 is elastically deformed, and then the leg of the second base 23 A cover 232 is respectively coupled to the outside of the frame 231, and a connecting rod 233 is laterally connected between the two legs, and two sets of the first link group 21 and the second link group 22 are located on the first foot bar 211 and And at least one cross bar 24 is connected between the second leg 221, and the first link group 21 and the second link group 22 are respectively formed by the support 11 and the base 23 as an axis. The inward or outward fan-shaped displacement group constitutes the type of the isosceles link group, so that the table 1 is vertically moved up and down.

The adjusting device 3 includes two sets of first sliding racks 31 and second sliding racks 32 respectively disposed opposite to each other in the sliding space 110 of the support 11, and the first sliding rack 31 and the second sliding rack 32 are respectively provided with tooth portions 311 and 321 at the inner side, and each of the first sliding rack 31 and the second sliding rack 32 is respectively provided with a downward extending outer portion of the support 11 and the first leg 211 or The connecting pieces 3111 and 3211 pivotally connected to the second leg 221 are respectively disposed at the end of the first sliding rack 31 and the second sliding rack 32 adjacent to the linking pieces 3111 and 3211. a first guide rod 312 and a second guide for reciprocating sliding displacement in the first rail groove 114 and the second rail groove 115 a rod 322, and the other ends of the first guiding rod 312 and the second guiding rod 322 respectively sleeve the rollers 3121 and 3221 located in the limiting rail 111, and the first sliding rack 31 and the second sliding rack A sliding wheel body (such as a roller or a bearing, etc.) 313, 323 is disposed on the other side of the first guiding rod 312 and the second guiding rod 322, respectively.

In addition, the adjusting device 3 is disposed between each of the first sliding racks 31 and the second sliding racks 32 to be respectively provided with a locking portion 33, and the locking portion 33 includes a base frame 331 and a center pivotally connected to the base frame 331 A 332, and an accommodating space 3310 through which the second sliding rack 32 passes transversely is formed between the side plates 3311 extending upwardly from the left and right sides of the base frame 331, and the one side plate 3311 is assembled outside the support 11 The first shaft hole 3312 is further disposed below the side plate 3311, and the horizontal lug 3313 of the other side plate 3311 of the base frame 331 is bent and extended in the limiting rail frame 111, and is disposed on the lug 3313. a second shaft hole 3314 is provided, and at least one of the latching holes 3315 is formed in the periphery of the lug 3313; and the sun gear 332 is engaged with the teeth of the first sliding rack 31 and the second sliding rack 32. The first sliding rack 31 and the second sliding rack 32 are respectively displaced in opposite directions, and the through hole 3321 of the central gear 332 is axially provided with the pivoting member 333, and The pivoting member 333 includes a stud 3331 that is riveted into the mounting hole 1114 of the limiting rail 111, and is located at the center tooth. A plurality of upper and lower gasket 3332 332 sides, and from bottom to top through the through hole 3321 base frame 3314 and the second shaft hole 331 of the sun gear 332 in the stud and threaded into the screw combined into one of 3331 3333.

However, the lock portion 33 is coupled to the operation portion 34, and the operation portion 34 includes a hanging handle 341 located outside the holder 11, and the handle 341 is rotated. The shaft 3411 is pivotally connected to the two first shaft holes 3312 of the base frame 331 at a side of the handle 341, and the shaft 3411 is adjacent to the handle 341. A reset torsion spring 3412 is provided. The two ends of the return torsion spring 3412 are respectively elastically deformed against the base frame 331 and the handle 341, and are vertically disposed at the other end of the shaft 3411 relative to the handle 341. a hook-shaped retaining member 342 at the periphery of the gear 332, and a hook-shaped retaining portion 3421 extending upwardly at one side of the engaging member 342, and a resisting portion 3422 at the other side of the blocking portion 3421. And the ejector rod 3431 having the buffer body 343 is disposed from the bottom to the top of the perforation 3242 of the abutting portion 3422, and the spring 3432 is sleeved on the ejector rod 3431, and then the nut 3433 is screwed. The two ends of the spring 3432 are respectively elastically deformed against the resisting portion 3422 and the nut 3343, and can be abutted on the top plate 1111 of the limiting rail frame 111 by the nut 3343 of the buffer body 343. The blocking portion 3421 of the interlocking member 342 is rotated upward to catch the slot of the sun gear 332, and the blocking portion 3421 is located in the slot 3315 of the base frame 331. The locked state is formed.

Please refer to the seventh, eighth, ninth, tenth, eleventh and twelfth figures for the side view, the side view, the partial enlargement, the partial enlargement, the partial stereo view, The adjusted side view and the action diagram of the folding mode can be clearly seen from the figure. When the user wants to adjust the height of the table 1, the palms of the hands can be used to first abut against the sides of the table top, and The handle 341 of the operating portion 34 is simultaneously biased by the finger, so that the handle 341 can be pivoted upward toward the bottom surface of the table 1 by the shaft 3411, and is rotated by the handle 341 to the reset torsion spring 3412. In an elastically deformed state, the blocking portion 3421 at one side of the interlocking member 342 can be disengaged downward from the tooth groove at the periphery of the sun gear 332. And the restriction of the card slot 3315 of the base frame 331 forms an unlocked state, and the spring portion 3432 of the cushioning body 343 is elastically deformed by the abutting portion 3422 at the other end of the clamping member 342, and then the table board 1 is biased. Pressing or lifting up, the two sets of the first link set 21 and the second link set 22 of the link mechanism 2 can be expanded or folded.

When the first link group 21 and the second link set 22 are actuated, the first shaft 212 and the second shaft 222 respectively have the first shaft portion 112 and the second shaft of the support 11 respectively. The portion 113 is rotated at an angle to the axis, and the lower portion of the first leg 211 and the second leg 221 is formed by a relative inward or outward fan-shaped displacement group with the base 23 as an axis. And the first leg 211 and the second leg 221 are rotatably pushed against the torsion spring 2313 to be elastically deformed, and the first sliding is respectively driven by the first leg 211 and the second leg 221 The rack 31 and the second sliding rack 32 are located in the sliding space 110 of the support 11 for sliding inward or outward, so that the teeth 311 and 321 are rotated by the central gear 332 of the locking portion 33. And the first guiding rod 312 and the second guiding rod 322 are respectively reciprocally slidingly displaced along the first rail groove 114 and the second rail groove 115 of the support 11, and the rollers 3121, 3221, the sliding wheel bodies 313, 323 Rolling displacement along the rail plate 1113 at the lower portion of the limiting rail frame 111 to assist the central gear 332 to drive the first sliding rack 31 and the second sliding rack 32 Do not displaced in the opposite direction, so that the top plate 1 may reach a synchronous link mechanism 2 with the lifting displacement.

When the table 1 is adjusted to an appropriate height position, the handle 341 of the operating portion 34 can be released, and the spring 3432 of the buffering body 343 can be rotated by the reset torsion spring 3412 to rotate the handle 341 downwardly, so that the card can be interlocked. The stopper portion 3421 of the piece 342 is rotated upward to catch the locking groove in the tooth groove of the sun gear 332, and the stopper portion 3 is formed. The 421 is located in the card slot 3315 of the base frame 331 and can also extend upwardly into the positioning hole 1115 of the limiting rail frame 111 to form a clamping position, so that the central gear 332 can be rotated by the restriction of the clamping member 342. The tooth portions 311 and 321 of the first sliding rack 31 and the second sliding rack 32 are caught by the sun gear 332, and the first sliding rack 31 and the second sliding rack 32 cannot be along the limiting rail 111. Sliding displacement, and the support table 1 which is stable through the first link group 21 and the second link set 22 is positioned at a predetermined height position, and the adjusting device 3 is respectively assembled on the two sides of the bottom surface of the table 1 11 , the first link group 21 and the second link group 22 that drive the two sets of the link mechanism 2 can be respectively operated or unfolded by the operation portion 34 while pressing or lifting the table 1 . The action allows the user to easily and quickly adjust the height position of the table 1 to achieve a stable structure and easy operation.

In this embodiment, the first sliding rack 31 and the second sliding rack 32 of each group of the adjusting device 3 are respectively assembled in the support 11 of the table 1 to form a left-right opposite arrangement, and in the first sliding rack 31 is coupled with the central gear 332 of the locking portion 33 at the inner side opposite to the second sliding rack 32. When the table 1 is pressed or pushed up, the two sets of the first link group 21 and the second connection of the linkage mechanism 2 are driven. When the rod group 22 is unfolded or folded, the movement of the first sliding rack 31 and the second sliding rack 32 in the sliding space 110 of the support 11 for sliding relative to the inward or outward direction may be linked, and the central gear 332 is driven by the central gear 332. The first sliding rack 31 and the second sliding rack 32 are respectively displaced in opposite directions, so that the displacement stroke of the first link group 21 and the second link group 22 can be shortened to speed up the table plate 1 to be adjusted for lifting displacement. The speed of the link mechanism 2 can be folded when the first link group 21 and the second link group 22 are arranged to form a left-right opposite direction so that the card is not caught when it is folded onto the base 23. A flat state to effectively reduce the overall size of the space, but also improve the movement, handling and storage Then sex.

Therefore, the present invention is mainly directed to the first link group 21 and the second link group 22 respectively connected to the link mechanism 2 on the support 11 at the two sides of the bottom surface of the table 1 and on the first link The first sliding rack 31 and the second sliding rack 32 of the adjusting device 3 in the support 11 are respectively pivotally connected to the group 21 and the second connecting rod group 22, and the first sliding rack 31 and the second sliding rack are respectively connected. The central gear 332 of the locking portion 33 is engaged between the 32, and the handle 341 of the operating portion 34 is pulled to disengage the central gear 332 to form an unlocked state, and then the table 1 is pressed or lifted. A link group 21 and the second link set 22 are deployed or folded, and the first sliding gear 31 and the second sliding rack 32 are respectively displaced by the sun gear 332 in opposite directions to synchronize the table 1 The action of lifting and lowering.

The above detailed description is intended to be illustrative of a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and other equivalents and modifications may be made without departing from the spirit of the invention. Changes are to be included in the scope of patents covered by this creation.

In summary, the above-mentioned adjustable lifting table structure can achieve its efficacy and purpose when used. Therefore, this creation is a practical and excellent creation, which is in line with the application requirements of the new patent, and the application is made according to law. I hope that the trial committee will grant this case as soon as possible to protect the hard work of the new creators. If there is any doubt in the bureau, please do not hesitate to give instructions. The new creators will try their best to cooperate with them.

1‧‧‧Table board

11‧‧‧Support

110‧‧‧Sliding space

111‧‧‧Limited rail

1111‧‧‧ top board

1112‧‧‧ Sidewall panels

1113‧‧‧rail plate

112‧‧‧First shaft

113‧‧‧Second shaft

114‧‧‧First track slot

115‧‧‧Second rail slot

12‧‧‧ ‧ boards

121‧‧‧ Telescopic slides

13‧‧‧Sub-table

2‧‧‧ linkage mechanism

21‧‧‧First Link Group

22‧‧‧Second linkage

23‧‧‧Base

231‧‧‧foot frame

232‧‧‧ cover

233‧‧‧ Connecting rod

24‧‧‧crossbar

3‧‧‧Adjustment device

31‧‧‧First sliding rack

32‧‧‧Second sliding rack

33‧‧‧Locking Department

331‧‧‧ pedestal

34‧‧‧Operation Department

341‧‧‧Handle

342‧‧‧Card parts

Claims (12)

The utility model relates to an adjustable lifting table structure, which comprises a table board, a connecting rod mechanism and an adjusting device, wherein: the left and right sides of the bottom surface of the table board are respectively provided with a support with a limiting rail frame, and are inside the limiting rail frame A sliding space is formed, and a first shaft portion and a second shaft portion are respectively disposed at front and rear of each limiting rail frame; the connecting rod mechanism comprises two groups respectively assembled under the support and with the first shaft portion, a first link group and a second link set pivotally connected to the two shaft portions, and each of the first link group and the second link set respectively has a first leg and a second leg that are formed to be arranged in a front-rear direction; The adjusting device comprises two sets of first sliding racks and second sliding racks respectively assembled in the sliding space of the support and pivoted with the first leg and the second leg, and the first sliding rack and the second sliding The locking portion provided between the racks includes a base frame and a central gear pivotally connected to the base frame. The central gear is meshed with the first sliding rack and the second sliding rack opposite to the inner side, and is coupled to the locking portion. The operating part is located on the outside of the support, and the handle is vertically connected to the base on one side of the handle. a shaft, and a clamping member for locking the central gear to form a locked state at the other end of the shaft relative to the handle; when the handle is rotated upward, the interlocking member is disengaged downward from the central gear to form an unlocking State, then press or lift the table to drive the first link set and the second link set to expand or collapse, and the first sliding rack and the second sliding rack along the limit rail are driven by the central gear The racks are respectively displaced in opposite directions to synchronize the table plates for lifting and lowering. The adjustable lifting table structure according to claim 1, wherein the table rail has a top plate at the support rail of the support, and a side wall plate is disposed at two sides of the top plate, and the two side wall plates are provided. The first shaft portion and the second shaft portion are respectively disposed at diagonal positions of the rear portion, and the first rail groove and the second rail groove are respectively disposed at the other diagonal position of the two side wall plates, and the first sliding teeth of the adjusting device are respectively A first guide rod and a second guide rod which are reciprocally slidably displaced in the first rail groove and the second rail groove are respectively laterally penetrated at one side of the strip and the second sliding rack. The adjustable lifting table structure according to claim 2, wherein the support is provided with a mounting hole at the center of the top plate of the limiting rail, and the base of the locking portion is bent and extended at the limit. a lug having a second shaft hole in the rail frame, and the center gear is axially disposed with a pivoting member, the pivoting member includes a stud riveted into the mounting hole and a snail passing through the second shaft hole and the center gear Screws that enter the studs. The adjustable lifting table structure according to claim 3, wherein the support is provided with a positioning hole around the mounting hole of the limiting rail, and the engaging portion of the operating portion has an extending end. A locking portion for locking positioning is formed into the positioning hole. The adjustable lifting table structure according to claim 2, wherein the supporting seat is a horizontal rail plate having a relatively inwardly turning direction under the two side wall plates of the limiting rail frame, and the first sliding rack is One side of the second sliding rack is respectively provided with a connecting piece extending downwardly from the outside of the support and pivotingly connected to the upper side of the first leg or the second leg, and is in the first sliding rack and the second sliding tooth The first guiding rod and the second guiding rod respectively adjacent to the connecting piece adjacent to the linking piece are sleeved with rollers rolling along the track plate. The adjustable lifting table structure according to claim 2, wherein the supporting seat is a horizontal rail plate having a relatively inwardly turning direction under the two side wall plates of the limiting rail frame, and the first sliding rack is The second sliding rack is respectively provided with a sliding wheel body that is rollingly displaced along the rail plate with respect to the other sides of the first guiding rod and the second guiding rod. The adjustable lifting table structure according to claim 1, wherein the two seats of the table are located at opposite sides of the limiting rail frame, and are provided with a frame plate, and are respectively provided with telescopic sliding under the two plates. A rail and a sub-table are assembled between the two telescopic rails. The adjustable lifting table structure according to claim 1, wherein the link mechanism is pivotally connected to the first leg of the first link group and the second leg of the second link group respectively. There is a first pole and a second pole, and the first pole is pivotally connected to the first shaft portion of the bracket relative to the other side of the first leg, and each second pole is opposite to the second leg The other side of the rod is pivotally connected to the second shaft portion of the support. The adjustable lifting table structure according to claim 1, wherein the link mechanism is a base assembled with a foot frame under the first link group and the second link group, and is arranged on the foot frame A first shaft and a second shaft for pivotally connecting the first leg and the second leg are respectively disposed laterally on the front and rear sides, and each of the first shaft and the second shaft are respectively sleeved A torsion spring held in a state in which the first leg or the second leg is elastically deformed. The adjustable lifting table structure according to claim 1, wherein the adjusting device has a side plate extending upward at two sides of the base frame of the locking portion, and a second sliding tooth is formed between the two side plates. The strip passes transversely through the accommodating space therein, and one of the side plates is assembled on the support, and the first shaft hole for pivoting the handle of the handle is provided below the two side plates, and the other of the pedestals Above the side plate, there is a lug in the limiting rail frame, and a second shaft hole is formed on the lug, and the through hole of the central gear is axially inserted through the second shaft of the base frame. The holes are combined to form an integral pivoting element. The adjustable lifting table structure according to claim 10, wherein the base frame has at least one card slot inwardly at the periphery of the lug, and has a direction on one side of the card member. The upper gear is caught on the center gear and is located in the card slot to form a locked state. The adjustable lifting table structure according to claim 1, wherein the adjusting device is provided with a reset torsion spring which is elastically deformed on the handle when the shaft of the operating portion is adjacent to the handle. a hook-shaped stop portion extending upwardly is formed at one side of the clamping member, and a resisting portion having a perforation is provided at the other side of the blocking portion, and the through-hole of the buffer body is pierced by the through hole The spring is sleeved on the top push rod, and the nut on the inner wall surface of the limit rail frame is screwed on the push rod, and the two ends of the spring are respectively pressed against the resisting portion and the nut An elastic deformation state.