Synchronous lifting table

Abstract

The utility model provides a synchronous lifting table which comprises a table board, a first graded lifting leg, a second graded lifting leg, a synchronous lifting mechanism and a synchronous unlocking mechanism, the first graded lifting leg and the second graded lifting leg are both vertically connected to the bottom of the table board, and the synchronous lifting mechanism is associated between the first graded lifting leg and the second graded lifting leg; the synchronous lifting mechanism is linked with the first grading lifting leg and the second grading lifting leg to synchronously lift; the synchronous unlocking mechanism is arranged at the bottom of the table board, the first grading lifting leg and the second grading lifting leg are both connected to the synchronous unlocking mechanism, and the synchronous unlocking mechanism can synchronously unlock to allow the first grading lifting leg and the second grading lifting leg to ascend and descend. The synchronous lifting table has the advantages of being simple in structure, low in manufacturing cost, easy to adjust and operate and capable of achieving synchronous lifting.

Description

Technical Field

[0001] The present application relates to the technical field of tables, and in particular to a synchronous lifting table. Background Art

[0002] In daily office or home environment, tables are specially used by people to read, study or work, which greatly facilitates people's study and work, and also improves people's study and work efficiency. In contemporary society, tables have almost become essential furniture, and people's demand for the use of tables is increasing.

[0003] However, traditional tables are often fixed and cannot be adjusted during use, and cannot meet the needs of use at different heights or different horizontal positions.

[0004] There are also some tables that can be adjusted in height, but their structures are relatively complex, the manufacturing cost is high, and the adjustment operation is cumbersome and complicated. Moreover, for a table with two supporting legs, each supporting leg needs to be raised and lowered separately, which has the problem of the two supporting legs not being raised and lowered synchronously and the lifting heights being inconsistent, which seriously affects the user experience.

[0005] Therefore, there is an urgent need for a synchronous lifting table to overcome the above-mentioned problems. Utility Model Content

[0006] The purpose of the embodiments of the present application is to provide a synchronous lifting table, which has the advantages of simple structure, low manufacturing cost, simple adjustment operation and the ability to achieve synchronous lifting.

[0007] To achieve the above-mentioned purpose, the present application provides a synchronous lifting table, comprising: a table top, a first-level lifting leg, a second-level lifting leg, a synchronous lifting mechanism and a synchronous release mechanism.

[0008] The first step-up and second step-up legs are both vertically connected to the bottom of the table top.

[0009] The synchronous lifting mechanism is associated between the first stage lifting leg and the second stage lifting leg, and the synchronous lifting mechanism links the first stage lifting leg and the second stage lifting leg to rise and fall synchronously;

[0010] The synchronous locking release mechanism is arranged at the bottom of the table top, and the first stepped lifting leg and the second stepped lifting leg are both connected to the synchronous locking release mechanism, and the synchronous locking release mechanism can synchronously release to allow the first stepped lifting leg and the second stepped lifting leg to be lifted and lowered.

[0011] Optionally, the first staged lifting leg comprises: a first support base, a first vertical sleeve, a first lifting sleeve and a first connecting seat, the first vertical sleeve is vertically fixed on the first support base, the first lifting sleeve is vertically moved and inserted into the first vertical sleeve, the first connecting seat is fixedly connected to the upper end of the first lifting sleeve, and the first connecting seat is fixedly connected to the bottom of the table top;

[0012] The second stepped lifting leg includes: a second supporting base, a second vertical sleeve, a second lifting sleeve and a second connecting seat. The second vertical sleeve is vertically fixed on the second supporting base. The second lifting sleeve is vertically moved and placed in the second vertical sleeve. The second connecting seat is fixedly connected to the upper end of the second lifting sleeve. The second connecting seat is fixedly connected to the bottom of the table top.

[0013] Optionally, the synchronous lifting mechanism includes: a first gear, a first rack, a second gear, a second rack and a lifting linkage rod.

[0014] The first gear is pivotally connected to the first vertical sleeve, the first rack is vertically fixed to the first lifting sleeve, and the first gear is meshed with the first rack;

[0015] The second gear is pivotally connected to the second vertical sleeve, the second rack is vertically fixed to the second lifting sleeve, and the second gear is meshed with the second rack;

[0016] The rotation axis center line of the first gear and the rotation axis center line of the second gear are both arranged in the left-right direction, and the rotation axis center line of the first gear coincides with the rotation axis center line of the second gear;

[0017] The lifting linkage rod is fixedly connected between the first gear and the second gear along the rotation axis of the first gear.

[0018] Optionally, the first staged lifting leg further comprises: a first fixed mounting column, a first linkage holder, a first staged positioning member, a first swing engaging member, a first elastic member, a first unlocking sliding seat, a first traction member and a plurality of first constant force springs.

[0019] The first fixed installation column is vertically fixed on the first support base, and the first fixed installation column is inserted into the first lifting sleeve with a gap; the first linkage clamping seat is vertically fixed on the inner side wall of the first lifting sleeve, the fixing part of the first constant force spring is fixedly connected to the first fixed installation column, and the first linkage clamping seat is provided with a first accommodating groove corresponding to the first constant force spring in a one-to-one manner, the opening of the first accommodating groove is horizontally facing the first fixed installation column, and the coil spring part of the first constant force spring is movably accommodated in the first accommodating groove in a one-to-one manner;

[0020] The first grading positioning member is integrally formed or fixedly connected to the first fixed mounting column, and a plurality of first positioning slots are formed on the first grading positioning member, and the first positioning slots are distributed spaced apart in the vertical direction; the upper end of the first swing clamping member is pivotally connected to the inner side wall of the first lifting sleeve, and the lower end of the first swing clamping member can be selectively engaged in the first positioning slot at any position; the first elastic member abuts between the inner side wall of the first lifting sleeve and the first swing clamping member, and the first elastic member constantly drives the first swing clamping member to swing in the direction of engaging with the first positioning slot facing it; the first release slide moves vertically on at least one of the first fixed mounting column and the first grading positioning member, the first traction member moves vertically on at least one of the first fixed mounting column and the first grading positioning member, the first release slide is fixedly connected to the lower end of the first traction member, and the upper end of the first traction member extends to the top of the first lifting sleeve; the first release slide can push the first swing clamping member to disengage from the engaged first positioning slot;

[0021] The second stage lifting leg further comprises: a second fixed mounting column, a second linkage clamping seat, a second stage positioning member, a second swing clamping member, a second elastic member, a second release sliding seat, a second traction member and a plurality of second constant force springs.

[0022] The second fixed installation column is vertically fixed on the second support base, and the second fixed installation column is inserted into the second lifting sleeve with a gap; the second linkage clamping seat is vertically fixed on the inner side wall of the second lifting sleeve, the fixing part of the second constant force spring is fixedly connected to the second fixed installation column, and the second linkage clamping seat is provided with a second accommodating groove corresponding to the second constant force spring in a one-to-one manner, the second accommodating groove opening is horizontally facing the second fixed installation column, and the coil spring part of the second constant force spring is movably accommodated in the second accommodating groove in a one-to-one manner;

[0023] The second grading positioning member is integrally formed or fixedly connected to the second fixed mounting column, and a plurality of second positioning slots are formed on the second grading positioning member, and the second positioning slots are distributed at intervals in the vertical direction; the upper end of the second swing clamping member is pivotally connected to the inner side wall of the second lifting sleeve, and the lower end of the second swing clamping member can be selectively engaged in the second positioning slot at any position; the second elastic member abuts between the inner side wall of the second lifting sleeve and the second swing clamping member, and the second elastic member constantly drives the second swing clamping member to swing in the direction of engaging with the second positioning slot facing it; the second release slide moves vertically on at least one of the second fixed mounting column and the second grading positioning member, and the second traction member moves vertically on at least one of the second fixed mounting column and the second grading positioning member, the second release slide is fixedly connected to the lower end of the second traction member, and the upper end of the second traction member extends to the top of the second lifting sleeve; the second release slide can push the second swing clamping member out of the engaged second positioning slot.

[0024] Optionally, the synchronous release mechanism comprises: a first vertical pull rod, a first swing arm, a second vertical pull rod, a second swing arm and a release linkage rod.

[0025] The first vertical pull rod is vertically movable on the first connecting seat, and the lower end of the first vertical pull rod is connected to the upper end of the first traction member; the first pivoting portion and the second pivoting portion are formed on the first swing arm, and the first pivoting portion and the second pivoting portion are spaced apart from each other along the length direction of the first swing arm;

[0026] The first pivoting portion is horizontally pivoted to the first connecting seat, and the second pivoting portion is horizontally pivoted to the upper end of the first vertical pull rod;

[0027] The second vertical pull rod is vertically movable and arranged on the second connecting seat, and the lower end of the second vertical pull rod is connected to the upper end of the second traction member; a third pivoting portion and a fourth pivoting portion are formed on the second swing arm, and the third pivoting portion and the fourth pivoting portion are arranged spaced apart along the length direction of the second swing arm;

[0028] The third pivoting portion is horizontally pivoted to the second connecting seat, and the fourth pivoting portion is horizontally pivoted to the upper end of the second vertical pull rod;

[0029] The rotation axis centerline of the first pivoting portion and the rotation axis centerline of the third pivoting portion are both arranged in the left-right direction, and the rotation axis centerline of the first pivoting portion coincides with the rotation axis centerline of the third pivoting portion;

[0030] The release linkage rod is fixedly connected between the first pivoting portion and the third pivoting portion along a rotation axis of the first pivoting portion.

[0031] Optionally, a fifth pivot portion is further formed on the first swing arm, and the first pivot portion is located between the fifth pivot portion and the second pivot portion along the length direction of the first swing arm;

[0032] The synchronous lock release mechanism further includes: a first lock release swinging member, the first lock release swinging member is pivotally connected to the first connecting seat, and the rotation axis of the first lock release swinging member is arranged along the left-right direction;

[0033] One end of the first unlocking swing member is pivotally connected to the fifth pivoting portion, the other end of the first unlocking swing member forms a first unlocking operating portion, and the rotation axis of the first unlocking swing member is located between the fifth pivoting portion and the first unlocking operating portion.

[0034] Optionally, a sixth pivot portion is further formed on the second swing arm, and the third pivot portion is located between the sixth pivot portion and the fourth pivot portion along the length direction of the second swing arm;

[0035] The synchronous lock release mechanism further includes: a second lock release swinging member, the second lock release swinging member is pivotally connected to the second connecting seat, and the rotation axis of the second lock release swinging member is arranged along the left-right direction;

[0036] One end of the second lock release swinging member is pivotally connected to the sixth pivoting portion, the other end of the second lock release swinging member forms a second lock release operating portion, and the rotation axis of the second lock release swinging member is located between the sixth pivoting portion and the second lock release operating portion.

[0037] Optionally, a fifth pivot portion is further formed on the first swing arm, and the first pivot portion is located between the fifth pivot portion and the second pivot portion along the length direction of the first swing arm;

[0038] The synchronous release mechanism also includes: a first linkage slide, a first release swing member and a first linkage swing arm.

[0039] The first linkage slide is slidably disposed on the first connection seat along the front-to-back direction, a first elongated guide hole penetrating along the left-to-right direction is formed on the first linkage slide, the length direction of the first elongated guide hole is obliquely arranged along the front-to-back direction, and the fifth pivot portion is slidably connected in the first elongated guide hole;

[0040] The first lock-releasing swinging member is pivotally connected to the first connecting seat, and the rotation axis of the first lock-releasing swinging member is arranged in the left-right direction; a first lock-releasing operating portion is formed at one end of the first lock-releasing swinging member, and a first swing pivot portion is formed at the other end of the first lock-releasing swinging member, and the rotation axis of the first lock-releasing swinging member is located between the first lock-releasing operating portion and the first swing pivot portion;

[0041] One end of the first linked swing arm is pivotally connected to the fifth pivot portion, the other end of the first linked swing arm is pivotally connected to the first swing pivot portion, and the pivot axis lines at both ends of the first linked swing arm are arranged along the left-right direction.

[0042] Optionally, a sixth pivot portion is further formed on the second swing arm, and the third pivot portion is located between the sixth pivot portion and the fourth pivot portion along the length direction of the second swing arm;

[0043] The synchronous release mechanism also includes: a second linkage slide, a second release swing member and a second linkage swing arm.

[0044] The second linkage slide is slidably disposed on the second connection seat along the front-to-back direction, a second elongated guide hole penetrating along the left-to-right direction is formed on the second linkage slide, the length direction of the second elongated guide hole is obliquely arranged along the front-to-back direction, and the sixth pivot portion is slidably connected in the second elongated guide hole;

[0045] The second lock-releasing swinging member is pivotally connected to the second connecting seat, and the rotation axis of the second lock-releasing swinging member is arranged along the left-right direction;

[0046] A second unlocking operation portion is formed at one end of the second unlocking swinging member, a second swinging pivot portion is formed at the other end of the second unlocking swinging member, and a rotation axis of the second unlocking swinging member is located between the second unlocking operation portion and the second swinging pivot portion;

[0047] One end of the second linked swing arm is pivotally connected to the sixth pivot portion, the other end of the second linked swing arm is pivotally connected to the second swing pivot portion, and the pivot axis lines at both ends of the second linked swing arm are arranged along the left-right direction.

[0048] Optionally, the synchronous lifting table also includes: a first connecting sleeve and a second connecting sleeve, the first connecting sleeve is fixedly connected between the first vertical sleeve and the second vertical sleeve along the left-right direction; the second connecting sleeve is fixedly connected between the first connecting seat and the second connecting seat along the left-right direction.

[0049] Since the first and second tiered lifting legs of the synchronous lifting table of the present application are both vertically connected to the bottom of the table board, the synchronous lifting mechanism is associated between the first and second tiered lifting legs, and the synchronous lifting mechanism links the first and second tiered lifting legs to synchronously lift and lower; the synchronous release mechanism is arranged at the bottom of the table board, and the first and second tiered lifting legs are both connected to the synchronous release mechanism, and the synchronous release mechanism can synchronously release to allow the first and second tiered lifting legs to lift and lower. Then, by operating the synchronous release mechanism, the first and second tiered lifting legs can be synchronously released to allow the first and second tiered lifting legs to lift and lower, and the first and second tiered lifting legs can be synchronously lifted and lowered by the synchronous lifting mechanism. When the first and second tiered lifting legs are synchronously lifted and lowered to the desired height position, the synchronous release mechanism is released, and the first and second tiered lifting legs can be locked at the height position, so that the first and second tiered lifting legs can be synchronously lifted and lowered. Not only is the structure simple, the manufacturing cost is low, and the adjustment operation is simple and convenient, but there is no need to separately operate the first step lifting leg and the second step lifting leg to lift. Through the synchronous lifting mechanism, the first step lifting leg and the second step lifting leg can be lifted synchronously, avoiding the problem of unsynchronized lifting and lifting and inconsistent lifting heights between the first step lifting leg and the second step lifting leg, which greatly improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a schematic three-dimensional assembly diagram of a synchronous lifting table according to the first embodiment of the present application.

[0051] Figure 2 This is a schematic three-dimensional diagram of the combination of the first stepped lifting legs of the synchronous lifting table of the first embodiment of the present application after the first supporting base is removed.

[0052] Figure 3 for Figure 2 Schematic diagram of the decomposition.

[0053] Figure 4 This is a schematic three-dimensional diagram of the combination of the second stepped lifting legs of the synchronous lifting table of the first embodiment of the application with the second supporting base removed.

[0054] Figure 5 for Figure 4 Schematic diagram of the decomposition.

[0055] Figure 6 It is a schematic three-dimensional assembly diagram of the synchronous lifting mechanism of the synchronous lifting table according to the first embodiment of the present application.

[0056] Figure 7 It is a schematic three-dimensional assembly diagram of the synchronous unlocking mechanism of the synchronous lifting table according to the first embodiment of the present application.

[0057] Figure 8It is a schematic three-dimensional assembly diagram of a synchronous lifting table according to the second embodiment of the present application.

[0058] Fig. 9 It is a schematic assembly three-dimensional diagram of the synchronous unlocking mechanism of the synchronous lifting table according to the second embodiment of the present application. DETAILED DESCRIPTION

[0059] The present application is further described below in conjunction with the accompanying drawings and preferred embodiments, but the implementation methods of the present application are not limited thereto.

[0060] See also Figures 1 to 4 , shows a synchronous lifting table 100 of the first embodiment of the present application, wherein the synchronous lifting table 100 of the present embodiment comprises: a table top 10, a first staged lifting leg 20, a second staged lifting leg 30, a synchronous lifting mechanism 40 and a synchronous release mechanism 50, the first staged lifting leg 20 and the second staged lifting leg 30 are both vertically connected to the bottom of the table top 10, that is, the table top 10 can be supported and lifted by the first staged lifting leg 20 and the second staged lifting leg 30. The synchronous lifting mechanism 40 is associated between the first staged lifting leg 20 and the second staged lifting leg 30, and the synchronous lifting mechanism 40 links the first staged lifting leg 20 and the second staged lifting leg 30 to rise and fall synchronously, thereby realizing the synchronous lifting and falling movement of the first staged lifting leg 20 and the second staged lifting leg 30. The synchronous release mechanism 50 is arranged at the bottom of the table top 10, and the first staged lifting leg 20 and the second staged lifting leg 30 are both connected to the synchronous release mechanism 50, and the synchronous release mechanism 50 can be synchronously released to allow the first staged lifting leg 20 and the second staged lifting leg 30 to rise and fall. Then, by operating the synchronous release mechanism 50, the lock can be released synchronously to allow the first graded lifting leg 20 and the second graded lifting leg 30 to be lifted and lowered. The synchronous lifting mechanism 40 links the first graded lifting leg 20 and the second graded lifting leg 30 to be lifted and lowered synchronously. When the first graded lifting leg 20 and the second graded lifting leg 30 are lifted and lowered synchronously to the desired height position, the synchronous release mechanism 50 is released, and the first graded lifting leg 20 and the second graded lifting leg 30 can be locked at the height position, so that the first graded lifting leg 20 and the second graded lifting leg 30 can be lifted and lowered synchronously. Not only is the structure simple, the manufacturing cost is low, and the adjustment operation is simple and convenient, but there is no need to operate the first graded lifting leg 20 and the second graded lifting leg 30 to be lifted and lowered separately. The synchronous lifting mechanism 40 allows the first graded lifting leg 20 and the second graded lifting leg 30 to be lifted and lowered synchronously, avoiding the problem of the first graded lifting leg 20 and the second graded lifting leg 30 being lifted and lowered asynchronously and the lifting height being inconsistent, which greatly improves the user experience. Specifically, as follows:

[0061] See also Figures 1 to 5In this embodiment, the first step-lifting leg 20 includes: a first support base 21a, a first vertical sleeve 21b, a first lifting sleeve 21c and a first connecting seat 21d, the first vertical sleeve 21b is vertically fixed on the first support base 21a, the first lifting sleeve 21c is vertically movable and inserted into the first vertical sleeve 21b, the first connecting seat 21d is fixedly connected to the upper end of the first lifting sleeve 21c, and the first connecting seat 21d is fixedly connected to the bottom of the table top 10. Furthermore, the second step-lifting leg 30 includes: a second support base 31a, a second vertical sleeve 31b, a second lifting sleeve 31c and a second connecting seat 31d, the second vertical sleeve 31b is vertically fixed on the second support base 31a, the second lifting sleeve 31c is vertically movable and inserted into the second vertical sleeve 31b, the second connecting seat 31d is fixedly connected to the upper end of the second lifting sleeve 31c, and the second connecting seat 31d is fixedly connected to the bottom of the table top 10. The vertical height of the table top 10 can be adjusted by lifting and lowering the first lifting sleeve 21c and the second lifting sleeve 31c.

[0062] See also Figures 1 to 6 In this embodiment, the synchronous lifting mechanism 40 includes: a first gear 41, a first rack 42, a second gear 43, a second rack 44 and a lifting linkage rod 45. The first gear 41 is pivoted to the first vertical sleeve 21b, the first rack 42 is vertically fixed to the first lifting sleeve 21c, and the first gear 41 is meshed with the first rack 42. The second gear 43 is pivoted to the second vertical sleeve 31b, the second rack 44 is vertically fixed to the second lifting sleeve 31c, and the second gear 43 is meshed with the second rack 44. The rotation axis of the first gear 41 and the rotation axis of the second gear 43 are both arranged in the left-right direction, and the rotation axis of the first gear 41 coincides with the rotation axis of the second gear 43. The lifting linkage rod 45 is fixedly connected between the first gear 41 and the second gear 43 along the rotation axis of the first gear 41. Then, the lifting linkage rod 45 is fixedly connected between the first gear 41 and the second gear 43, so that the first gear 41 and the second gear 43 rotate synchronously, and then the first gear 41 and the second gear 43 respectively drive the first rack 42 and the second rack 44 to rise and fall synchronously, so that the first lifting sleeve 21c and the second lifting sleeve 31c are lifted and moved synchronously, and the synchronous lifting mechanism 40 links the first stepped lifting leg 20 and the second stepped lifting leg 30 to rise and fall synchronously, avoiding inconsistent lifting and moving of the first lifting sleeve 21c and the second lifting sleeve 31c, and the structure is safer and more reasonable.

[0063] Optionally, in the present embodiment, the lifting linkage rod 45 is composed of two rods fixedly connected. Of course, in other embodiments, the lifting linkage rod 45 can also be selected as a rod with a longer length, which is within the protection scope of the present application, so it will not be described in detail here.

[0064] See also Figures 1 to 3In this embodiment, the first graded lifting leg 20 also includes: a first fixed installation column 22, a first linkage seat 23, a first graded positioning member 24, a first swing clamping member 25, a first elastic member 26, a first release slide 27, a first traction member 28 and a plurality of first constant force springs 29. The first fixed installation column 22 is vertically fixed on the first support base 21a, and the first fixed installation column 22 is inserted into the first lifting sleeve 21c with a gap, so that the first lifting sleeve 21c is movably arranged between the first fixed installation column 22 and the first vertical sleeve 21b, and the structural layout is more reasonable. The first linkage clamp 23 is vertically fixed on the inner wall of the first lifting sleeve 21c, the fixed part of the first constant force spring 29 is fixedly connected to the first fixed installation column 22, and the first linkage clamp 23 is provided with a first accommodating groove 231 corresponding to the first constant force spring 29, the first accommodating groove 231 opens horizontally toward the first fixed installation column 22, and the coiled spring part of the first constant force spring 29 is movably accommodated in the first accommodating groove 231 in a one-to-one manner. The coiled spring part of the first constant force spring 29 can be elastically unwound or rewound in the first accommodating groove 231, thereby realizing the tendency of the first lifting sleeve 21c to move vertically upward. Not only can the first lifting sleeve 21c be moved upward with effort, but also when the first lifting sleeve 21c is moved downward, it can also ensure that the first lifting sleeve 21c slowly and steadily descends, making the operation of the first lifting sleeve 21c moving up and down more stable and effortless. The first grading positioning member 24 is fixedly connected to the first fixed mounting column 22. Of course, in other embodiments, the first grading positioning member 24 can also be integrally formed on the first fixed mounting column 22, which is within the protection scope of the present application, so it will not be described in detail here. A plurality of first positioning slots 241 are formed on the first grading positioning member 24, and the first positioning slots 241 are distributed spaced apart in the vertical direction; the upper end of the first swing engaging member 25 is pivotally connected to the inner side wall of the first lifting sleeve 21c, and the lower end of the first swing engaging member 25 can be selectively engaged in the first positioning slot 241 at any position. By engaging the first swing engaging member 25 with the first positioning slots 241 at different height positions, the first lifting sleeve 21c can be locked at the corresponding height position, thereby realizing graded adjustment of the position in the vertical direction. The first elastic member 26 abuts between the inner side wall of the first lifting sleeve 21c and the first swing engaging member 25, and the first elastic member 26 constantly drives the first swing engaging member 25 to swing in the direction of engaging into the first positioning engaging groove 241. Thus, the first swing engaging member 25 is driven to automatically return to engage into the first positioning engaging groove 241, and is maintained in the state of being engaged into the first positioning engaging groove 241.The first release slide 27 moves vertically on the first graded positioning member 24. Of course, in other embodiments, the first release slide 27 can also be vertically moved on the first fixed installation column 22 or vertically moved on both the first fixed installation column 22 and the first graded positioning member 24, and the installation structure of the first release slide 27 can be realized. The first traction member 28 moves vertically on at least one of the first fixed installation column 22 and the first graded positioning member 24. The first release slide 27 is fixedly connected to the lower end of the first traction member 28, and the upper end of the first traction member 28 extends to the top of the first lifting sleeve 21c; the first release slide 27 can push the first swing clamping member 25 out of the first positioning slot 241. By operating the first traction member 28 to drive the first release slide 27 to push the first swing clamping member 25 out of the first positioning slot 241, the height position of the first lifting sleeve 21c can be adjusted by vertical lifting movement. The structure is simpler and more reasonable, and the operation is more convenient.

[0065] Optionally, in this embodiment, two sets of symmetrical first linkage seats 23 and first constant force springs 29 are arranged between the first fixed installation column 22 and the first lifting sleeve 21c, so as to more stably and evenly maintain the vertical upward movement trend of the first lifting sleeve 21c, making the lifting movement of the first lifting sleeve 21c more stable and firm.

[0066] Optionally, in this embodiment, the first grading positioning member 24, the first swing engaging member 25, the first elastic member 26, the first release slide 27 and the first traction member 28 are symmetrically arranged in two groups, and the upper ends of the two groups of first traction members 28 are integrally connected, so as to more stably and firmly lock the height position of the first lifting sleeve 21c to avoid looseness or instability.

[0067] See also Figure 1 , Figure 4 and Figure 5In this embodiment, the second graded lifting leg 30 also includes: a second fixed installation column 32, a second linkage seat 33, a second graded positioning member 34, a second swing clamping member 35, a second elastic member 36, a second release slide 37, a second traction member 38 and a plurality of second constant force springs 39. The second fixed installation column 32 is vertically fixed on the second support base 31a, and the second fixed installation column 32 is gap-through in the second lifting sleeve 31c, so that the second lifting sleeve 31c is movably arranged between the second fixed installation column 32 and the second vertical sleeve 31b, and the structural layout is more reasonable. The second linkage clamp 33 is vertically fixed on the inner wall of the second lifting sleeve 31c, the fixed part of the second constant force spring 39 is fixedly connected to the second fixed installation column 32, and the second linkage clamp 33 is provided with a second accommodating groove 331 corresponding to the second constant force spring 39, the second accommodating groove 331 opens horizontally toward the second fixed installation column 32, and the coil spring part of the second constant force spring 39 is movably accommodated in the second accommodating groove 331 in a one-to-one manner. The coil spring part of the second constant force spring 39 can be elastically unwound or rewound in the second accommodating groove 331, thereby realizing the tendency of the second lifting sleeve 31c to move vertically upward. Not only can the second lifting sleeve 31c be moved upward with effort, but also when the second lifting sleeve 31c is moved downward, it can also ensure that the second lifting sleeve 31c slowly and steadily descends, making the operation of the second lifting sleeve 31c moving up and down more stable and effort-saving. The second grading positioning member 34 is fixedly connected to the second fixed mounting column 32. Of course, in other embodiments, the second grading positioning member 34 can also be integrally formed on the second fixed mounting column 32, which is within the protection scope of the present application, so it will not be described in detail here. A plurality of second positioning slots 341 are formed on the second grading positioning member 34, and the second positioning slots 341 are distributed spaced apart in the vertical direction; the upper end of the second swinging engaging member 35 is pivotally connected to the inner side wall of the second lifting sleeve 31c, and the lower end of the second swinging engaging member 35 can be selectively engaged in the second positioning slot 341 at any position. By engaging the second swinging engaging member 35 with the second positioning slots 341 at different height positions, the second lifting sleeve 31c can be locked at the corresponding height position, thereby realizing graded adjustment of the position in the vertical direction. The second elastic member 36 abuts between the inner side wall of the second lifting sleeve 31c and the second swing engaging member 35, and the second elastic member 36 constantly drives the second swing engaging member 35 to swing in the direction of engaging into the second positioning engaging groove 341. Thus, the second swing engaging member 35 is driven to automatically return to engage into the second positioning engaging groove 341, and is maintained in the state of being engaged into the second positioning engaging groove 341.The second release slide 37 moves vertically on the second graded positioning member 34. Of course, in other embodiments, the second release slide 37 can also be selected to move vertically on the second fixed installation column 32 or be simultaneously vertically moved on both the second fixed installation column 32 and the second graded positioning member 34, and the second release slide 37 can be installed in a vertically movable manner. The second traction member 38 moves vertically on at least one of the second fixed installation column 32 and the second graded positioning member 34. The second release slide 37 is fixedly connected to the lower end of the second traction member 38, and the upper end of the second traction member 38 extends to the top of the second lifting sleeve 31c; the second release slide 37 can push the second swing clamping member 35 out of the second positioning slot 341. By operating the second traction member 38 to drive the second release slide 37 to push the second swing clamping member 35 out of the second positioning slot 341, the height position of the second lifting sleeve 31c can be adjusted by vertical lifting movement. The structure is simpler and more reasonable, and the operation is more convenient.

[0068] Optionally, in this embodiment, two sets of symmetrical second linkage seats 33 and second constant force springs 39 are arranged between the second fixed installation column 32 and the second lifting sleeve 31c, so as to more stably and evenly maintain the vertical upward movement trend of the second lifting sleeve 31c, making the lifting movement of the second lifting sleeve 31c more stable and firm.

[0069] Optionally, in this embodiment, the second grading positioning member 34, the second swing engaging member 35, the second elastic member 36, the second release slide 37 and the second traction member 38 are symmetrically arranged in two groups, and the upper ends of the two groups of second traction members 38 are integrally connected, so as to more stably and firmly lock the height position of the second lifting sleeve 31c to avoid looseness or instability.

[0070] See also Figure 1 , Figure 3 and Figure 7The synchronous release mechanism 50 includes: a first vertical pull rod 51, a first swing arm 52, a second vertical pull rod 53, a second swing arm 54 and a release linkage rod 55. The first vertical pull rod 51 is vertically movable on the first connection seat 21d, and the lower end of the first vertical pull rod 51 is connected to the upper end of the first traction member 28; the first swing arm 52 is formed with a first pivoting portion 521 and a second pivoting portion 522, and the first pivoting portion 521 and the second pivoting portion 522 are arranged spaced apart along the length direction of the first swing arm 52. The first pivoting portion 521 is horizontally pivoted on the first connection seat 21d, and the second pivoting portion 522 is horizontally pivoted to the upper end of the first vertical pull rod 51. The second vertical pull rod 53 is vertically movable on the second connection seat 31d, and the lower end of the second vertical pull rod 53 is connected to the upper end of the second traction member 38; the second swing arm 54 is formed with a third pivoting portion 541 and a fourth pivoting portion 542, and the third pivoting portion 541 and the fourth pivoting portion 542 are arranged spaced apart along the length direction of the second swing arm 54. The third pivoting portion 541 is horizontally pivoted on the second connection seat 31d, and the fourth pivoting portion 542 is horizontally pivoted to the upper end of the second vertical pull rod 53. The rotation axis of the first pivoting portion 521 and the rotation axis of the third pivoting portion 541 are both arranged in the left-right direction, and the rotation axis of the first pivoting portion 521 coincides with the rotation axis of the third pivoting portion 541. The release linkage rod 55 is fixedly connected between the first pivoting portion 521 and the third pivoting portion 541 along the rotation axis of the first pivoting portion 521. Then, the release linkage rod 55 is fixedly connected between the first pivoting portion 521 and the third pivoting portion 541, so that the first swing arm 52 and the second swing arm 54 rotate synchronously, and then the first swing arm 52 and the second swing arm 54 drive the first traction member 28 and the second traction member 38 to move synchronously up and down respectively, and then the first traction member 28 and the second traction member 38 synchronously drive the first release slide 27 and the second release slide 37 to push the corresponding first swing engagement member 25 and the second swing engagement member 35 synchronously out of the corresponding first positioning slot 241 and the second positioning slot 341. The inconsistent rotation of the first swing engagement member 25 and the second swing engagement member 35 is avoided, and the structure is safer and more reasonable.

[0071] Preferably, in this embodiment, a fifth pivoting portion 523 is further formed on the first swing arm 52, and the first pivoting portion 521 is located between the fifth pivoting portion 523 and the second pivoting portion 522 along the length direction of the first swing arm 52. The synchronous lock release mechanism 50 further includes: a first lock release swinging member 56, the first lock release swinging member 56 is pivoted to the first connecting seat 21d, and the rotation axis of the first lock release swinging member 56 is arranged along the left-right direction. One end of the first lock release swinging member 56 is pivoted to the fifth pivoting portion 523, and the other end of the first lock release swinging member 56 is formed with a first lock release operating portion 561, and the rotation axis of the first lock release swinging member 56 is located between the fifth pivoting portion 523 and the first lock release operating portion 561. When the first locking mechanism 561 is engaged, the second locking mechanism 562 is engaged with the locking cam 544, and the locking cam 542 is engaged with the locking cam 544. When the locking cam 542 is engaged, the locking cam 542 is engaged with the locking cam 544, and the locking cam 542 is engaged with the locking cam 544. Until the table top 10 is moved to the desired height position, and then the first unlocking operating part 561 is operated to swing downward, the first pulling member 28 and the second pulling member 38 will move downward synchronously, and then the first pulling member 28 and the second pulling member 38 will synchronously drive the first unlocking slide 27 and the second unlocking slide 37 to avoid the corresponding first swinging engaging member 25 and the second swinging engaging member 35 to synchronously engage in the opposite first positioning slot 241 and the second positioning slot 341, so as to achieve the positioning and locking of the height position of the table top 10.

[0072] Preferably, in this embodiment, a sixth pivoting portion 543 is further formed on the second swing arm 54, and the third pivoting portion 541 is located between the sixth pivoting portion 543 and the fourth pivoting portion 542 along the length direction of the second swing arm 54. The synchronous lock release mechanism 50 further includes: a second lock release swinging member 57, the second lock release swinging member 57 is pivoted to the second connecting seat 31d, and the rotation axis of the second lock release swinging member 57 is arranged along the left-right direction. One end of the second lock release swinging member 57 is pivoted to the sixth pivoting portion 543, and the other end of the second lock release swinging member 57 is formed with a second lock release operating portion 571, and the rotation axis of the second lock release swinging member 57 is located between the sixth pivoting portion 543 and the second lock release operating portion 571. Then, by operating the second unlocking operating portion 571 to swing upward, the second unlocking swinging member 57, one end away from the second unlocking operating portion 571, drives the sixth pivot portion 543 to swing downward, so that the fourth pivot portion 542 on the second swinging arm 54 swings upward, which can drive the second vertical pull rod 53 to pull the second traction member 38 to move vertically upward. Synchronously, the second swinging arm 54 drives the first swinging arm 52 to rotate synchronously through the unlocking linkage rod 55, so that the first swinging arm 52 and the second swinging arm 54 respectively drive the first traction member 28 and the second traction member 38 to rise and move synchronously in a one-to-one manner, and then the first traction member 28 and the second traction member 38 synchronously drive the first unlocking slide 27 and the second unlocking slide 37 to push the corresponding first swinging clamping member 25 and the second swinging clamping member 35 to synchronously disengage from the corresponding first positioning slot 241 and the second positioning slot 341, so that the height positions of the first lifting sleeve 21c and the second lifting sleeve 31c can be adjusted synchronously by vertical lifting and lowering. Until the table top 10 is moved to the desired height position, and then the second unlocking operating part 571 is operated to swing downward, the first traction member 28 and the second traction member 38 are synchronously moved downward, and then the first traction member 28 and the second traction member 38 synchronously drive the first unlocking slide 27 and the second unlocking slide 37 to avoid the corresponding first swinging engaging member 25 and the second swinging engaging member 35 to be synchronously engaged in the opposite first positioning slot 241 and the second positioning slot 341, thereby positioning and locking the height position of the table top 10.

[0073] Then, one of the first unlocking operation part 561 and the second unlocking operation part 571 may be selectively operated, or both the first unlocking operation part 561 and the second unlocking operation part 571 may be operated simultaneously to adjust the table top 10 to a desired height position.

[0074] For example, the synchronous release mechanism 50 may selectively include either or both of the first release swing member 56 and the second release swing member 57, both of which can achieve the required height position for operating the adjustment of the table top 10, and are all within the protection scope of the present application, so they will not be described in detail here.

[0075] See also Figure 1 Preferably, in this embodiment, the synchronous lifting table 100 of this embodiment further includes: a first connecting sleeve 60 and a second connecting sleeve 70, the first connecting sleeve 60 is fixedly connected between the first vertical sleeve 21b and the second vertical sleeve 31b along the left-right direction; the second connecting sleeve 70 is fixedly connected between the first connecting seat 21d and the second connecting seat 31d along the left-right direction. Preferably, in this embodiment, the lifting linkage rod 45 is movably inserted into the first connecting sleeve 60, and the release linkage rod 55 is movably inserted into the second connecting sleeve 70, and the structure is more reasonable and compact.

[0076] See also Figures 1 to 7 , the working principle of the synchronous lifting table 100 of this embodiment is described in detail:

[0077] First, by operating one of the first release operating part 561 and the second release operating part 571 or operating both the first release operating part 561 and the second release operating part 571 to swing upward, the first swing arm 52 and the second swing arm 54 are synchronously driven by the release linkage rod 55, so that the first swing arm 52 and the second swing arm 54 respectively drive the first traction member 28 and the second traction member 38 to move upward synchronously, and then the first traction member 28 and the second traction member 38 respectively drive the first release slide 27 and the second release slide 37 to push the corresponding first swing clamping member 25 and the second swing clamping member 35 to synchronously disengage from the corresponding first positioning slot 241 and the second positioning slot 341, so that the height positions of the first lifting sleeve 21c and the second lifting sleeve 31c can be adjusted synchronously by vertical lifting and lowering.

[0078] Moreover, the lifting linkage rod 45 is fixedly connected between the first gear 41 and the second gear 43, so that the first gear 41 and the second gear 43 rotate synchronously, and then the first gear 41 and the second gear 43 respectively drive the first rack 42 and the second rack 44 to lift synchronously, so that the first lifting sleeve 21c and the second lifting sleeve 31c can be lifted and moved synchronously.

[0079] Until the table top 10 is moved to the desired height position, and then the second unlocking operating part 571 is operated to swing downward, the first traction member 28 and the second traction member 38 will move downward synchronously, and then the first traction member 28 and the second traction member 38 will synchronously drive the first unlocking slide 27 and the second unlocking slide 37 to avoid the corresponding first swinging engaging member 25 and the second swinging engaging member 35 to be synchronously engaged in the opposite first positioning slot 241 and the second positioning slot 341, so as to position and lock the height position of the table top 10, and the height adjustment operation of the table top 10 can be completed.

[0080] See also Figures 8 to 9, showing a synchronous lifting table 100 'of the second embodiment of the present application, wherein the synchronous lifting table 100 'of this embodiment has basically the same structural principle as the synchronous lifting table 100 of the first embodiment, and the only difference is that:

[0081] In this embodiment, a fifth pivoting portion 523 is further formed on the first swing arm 52, and the first pivoting portion 521 is located between the fifth pivoting portion 523 and the second pivoting portion 522 along the length direction of the first swing arm 52. The synchronous release mechanism 50' further includes: a first linkage slide 58', a first release swing member 56' and a first linkage swing arm 52'. The first linkage slide 58' is slidably disposed on the first connecting seat 21d along the front-to-back direction. A first elongated guide hole 581' is formed on the first linkage slide 58' and penetrates along the left-to-right direction. The length direction of the first elongated guide hole 581' is arranged obliquely along the front-to-back direction. In this embodiment, the length direction of the first elongated guide hole 581' is selected to be arranged obliquely from the rear upper direction to the front lower direction. The fifth pivoting portion 523 is slidably connected in the first elongated guide hole 581'. The first unlocking swing member 56' is pivoted to the first connecting seat 21d, and the rotation axis of the first unlocking swing member 56' is arranged along the left-right direction; a first unlocking operation portion 561' is formed at one end of the first unlocking swing member 56', and a first swing pivot portion 562' is formed at the other end of the first unlocking swing member 56', and the rotation axis of the first unlocking swing member 56' is located between the first unlocking operation portion 561' and the first swing pivot portion 562'. One end of the first linkage swing arm 52' is pivoted to the first linkage slide 58', and the other end of the first linkage swing arm 52' is pivoted to the first swing pivot portion 562', and the pivot axis of both ends of the first linkage swing arm 52' are arranged along the left-right direction. Then, the first unlocking operation portion 561' is swung upward from the upwardly inclined state to the horizontal state, the first swinging pivot portion 562' drives the first linkage swing arm 52' to pull the first linkage slide 58' to move horizontally backward, and the fifth pivot portion 523 moves from the rear end of the first elongated guide hole 581' to the front end, so that the fifth pivot portion 523 swings downward, and the second pivot portion 522 on the first swing arm 52 swings upward, which can drive the first vertical pull rod 51 to pull the first pulling member 28 to move vertically upward. Synchronously, the first swing arm 52 drives the second pivot portion 523 to move vertically upward through the unlocking linkage rod 55. The movable arm 54 rotates synchronously, so that the first swing arm 52 and the second swing arm 54 drive the first traction member 28 and the second traction member 38 to rise and move synchronously respectively, and then the first traction member 28 and the second traction member 38 synchronously drive the first release slide 27 and the second release slide 37 to push the corresponding first swing engaging member 25 and the second swing engaging member 35 to synchronously disengage from the corresponding first positioning slot 241 and the second positioning slot 341, so that the height positions of the first lifting sleeve 21c and the second lifting sleeve 31c can be adjusted synchronously by vertical lifting and lowering.Until the table top 10 is moved to the desired height position, and then the first unlocking operating part 561' is operated to swing downward from the horizontal state to the upward inclined state, the first traction member 28 and the second traction member 38 will move downward synchronously, and then the first traction member 28 and the second traction member 38 will synchronously drive the first unlocking slide 27 and the second unlocking slide 37 to avoid the corresponding first swinging clamp 25 and the second swinging clamp 35 to synchronously engage in the opposite first positioning slot 241 and the second positioning slot 341, so as to achieve the positioning and locking of the height position of the table top 10.

[0082] Preferably, in this embodiment, a sixth pivoting portion 543 is further formed on the second swing arm 54, and the third pivoting portion 541 is located between the sixth pivoting portion 543 and the fourth pivoting portion 542 along the length direction of the second swing arm 54. The synchronous release mechanism 50' further includes: a second linkage slide 59', a second release swinging member 57' and a second linkage swing arm 54'. The second linkage slide 59' is slidably disposed on the second connecting seat 31d along the front-back direction. A second long guide hole 591' is formed on the second linkage slide 59' and penetrates along the left-right direction. The length direction of the second long guide hole 591' is arranged obliquely along the front-back direction, and the sixth pivoting portion 543 is slidably connected in the second long guide hole 591'. The second release swinging member 57' is pivotally connected to the second connecting seat 31d, and the rotation axis of the second release swinging member 57' is arranged along the left-right direction. A second unlocking operation portion 571' is formed at one end of the second unlocking swing member 57', a second swing pivot portion 572' is formed at the other end of the second unlocking swing member 57', and a rotation axis of the second unlocking swing member 57' is located between the second unlocking operation portion 571' and the second swing pivot portion 572'. One end of the second linkage swing arm 54' is pivotally connected to the second linkage slide 59', the other end of the second linkage swing arm 54' is pivotally connected to the second swing pivot portion 572', and the pivot axis of both ends of the second linkage swing arm 54' are arranged along the left-right direction. Then, the second unlocking operation portion 571' is swung upward from the upwardly inclined state to the horizontal state, the second swinging pivot portion 572' drives the second linkage swing arm 54' to pull the second linkage slide 59' to move horizontally backward, and the sixth pivot portion 543 moves from the rear end of the second elongated guide hole 591' to the front end, so that the sixth pivot portion 543 swings downward, and the fourth pivot portion 542 on the second swing arm 54 swings upward, which can drive the second vertical pull rod 53 to pull the second traction member 38 to move vertically upward. Synchronously, the second swing arm 54 drives the first swing arm 54 through the lock release linkage rod 55. The movable arm 52 rotates synchronously, so that the first swing arm 52 and the second swing arm 54 respectively drive the first traction member 28 and the second traction member 38 to rise and move synchronously, and then the first traction member 28 and the second traction member 38 respectively drive the first release slide 27 and the second release slide 37 to push the corresponding first swing engaging member 25 and the second swing engaging member 35 to synchronously disengage from the corresponding first positioning slot 241 and the second positioning slot 341, so that the height positions of the first lifting sleeve 21c and the second lifting sleeve 31c can be adjusted synchronously by vertical lifting and lowering.Until the table top 10 is moved to the desired height position, and then the second unlocking operating part 571' is operated to swing downward from the horizontal state to the upward inclined state, the first traction member 28 and the second traction member 38 will move downward synchronously, and then the first traction member 28 and the second traction member 38 will synchronously drive the first release slide 27 and the second release slide 37 to avoid the corresponding first swing clamping member 25 and the second swing clamping member 35 to synchronously engage in the opposite first positioning slot 241 and the second positioning slot 341, so as to achieve the positioning and locking of the height position of the table top 10.

[0083] Then, in this embodiment, one of the first unlocking operation part 561' and the second unlocking operation part 571' may be selectively operated, or both the first unlocking operation part 561' and the second unlocking operation part 571' may be operated simultaneously to adjust the desired height position of the table top 10.

[0084] Furthermore, for example, in the synchronous unlocking mechanism 50', it is possible to choose to only set the first linking slide 58', the first unlocking swing member 56' and the first linking swing arm 52', or to choose to only set the second linking slide 59', the second unlocking swing member 57' and the second linking swing arm 54', or to choose to set the first linking slide 58', the first unlocking swing member 56', the first linking swing arm 52', the second linking slide 59', the second unlocking swing member 57' and the second linking swing arm 54'. All of these can achieve the required height position of the operation to adjust the table top 10, and are all within the protection scope of the present application, so they will not be described in detail here.

[0085] Except for the above differences, other structural principles are the same as those of the synchronous lifting table 100 of the first embodiment, so they are not described here in detail.

[0086] Since the first step lifting leg 20 and the second step lifting leg 30 of the synchronous lifting table 100, 100' of the present application are vertically connected to the bottom of the table top 10, the synchronous lifting mechanism 40 is associated between the first step lifting leg 20 and the second step lifting leg 30, and the synchronous lifting mechanism 40 links the first step lifting leg 20 and the second step lifting leg 30 to rise and fall synchronously; the synchronous locking release mechanism 50, 50' is arranged at the bottom of the table top 10, and the first step lifting leg 20 and the second step lifting leg 30 are both connected to the synchronous locking release mechanism 50, 50', and the synchronous locking release mechanism 50, 50' can be released synchronously to allow the first step lifting leg 20 and the second step lifting leg 30 to rise and fall. Then, by operating the synchronous release mechanism 50, 50', the lock can be released synchronously to allow the first staged lifting leg 20 and the second staged lifting leg 30 to be lifted and lowered. The synchronous lifting mechanism 40 links the first staged lifting leg 20 and the second staged lifting leg 30 to be lifted and lowered synchronously. When the first staged lifting leg 20 and the second staged lifting leg 30 are lifted and lowered synchronously to the required height position, the synchronous release mechanism 50, 50' is released, and the first staged lifting leg 20 and the second staged lifting leg 30 can be locked at the height position, so that the first staged lifting leg 20 and the second staged lifting leg 30 can be lifted and lowered synchronously. Not only is the structure simple, the manufacturing cost is low, and the adjustment operation is simple and convenient, but also there is no need to operate the first staged lifting leg 20 and the second staged lifting leg 30 to be lifted and lowered separately. The first staged lifting leg 20 and the second staged lifting leg 30 can be lifted and lowered synchronously through the synchronous lifting mechanism 40, so as to avoid the problem of the first staged lifting leg 20 and the second staged lifting leg 30 not being lifted and lowered synchronously and the lifting height being inconsistent, which greatly improves the user experience.

[0087] The present application is described above in conjunction with the embodiments, but the present application is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations based on the essence of the present application.

Claims

1. A synchronous lifting table, characterized in that: include: Table top, first-level lifting legs, second-level lifting legs, synchronous lifting mechanism and synchronous release mechanism, The first step-up and second step-up legs are both vertically connected to the bottom of the table top. The synchronous lifting mechanism is associated between the first stage lifting leg and the second stage lifting leg, and the synchronous lifting mechanism links the first stage lifting leg and the second stage lifting leg to rise and fall synchronously; The synchronous release mechanism is disposed at the bottom of the table top, and the first stage lifting leg and the second stage lifting leg are both connected to the synchronous release mechanism, and the synchronous release mechanism can synchronously release to allow the first stage lifting leg and the second stage lifting leg to be lifted and lowered; The first staged lifting leg comprises: a first support base, a first vertical sleeve, a first lifting sleeve and a first connecting seat, wherein the first vertical sleeve is vertically fixed on the first support base, the first lifting sleeve is vertically movable and inserted into the first vertical sleeve, the first connecting seat is fixedly connected to the upper end of the first lifting sleeve, and the first connecting seat is fixedly connected to the bottom of the table top; The second step-up lifting leg comprises: a second support base, a second vertical sleeve, a second lifting sleeve and a second connecting seat, wherein the second vertical sleeve is vertically fixed on the second support base, the second lifting sleeve is vertically moved and inserted into the second vertical sleeve, the second connecting seat is fixedly connected to the upper end of the second lifting sleeve, and the second connecting seat is fixedly connected to the bottom of the table top; The synchronous lifting mechanism includes: a first gear, a first rack, a second gear, a second rack and a lifting linkage rod. The first gear is pivotally connected to the first vertical sleeve, the first rack is vertically fixed to the first lifting sleeve, and the first gear is meshed with the first rack; The second gear is pivotally connected to the second vertical sleeve, the second rack is vertically fixed to the second lifting sleeve, and the second gear is meshed with the second rack; The rotation axis center line of the first gear and the rotation axis center line of the second gear are both arranged in the left-right direction, and the rotation axis center line of the first gear coincides with the rotation axis center line of the second gear; The lifting linkage rod is fixedly connected between the first gear and the second gear along the rotation axis of the first gear.

2. The synchronous lifting table according to claim 1, characterized in that: The first staged lifting leg further comprises: a first fixed mounting column, a first linkage seat, a first staged positioning member, a first swing engaging member, a first elastic member, a first unlocking slide seat, a first traction member and a plurality of first constant force springs. The first fixed installation column is vertically fixed on the first support base, and the first fixed installation column is inserted into the first lifting sleeve with a gap; the first linkage clamping seat is vertically fixed on the inner side wall of the first lifting sleeve, the fixing part of the first constant force spring is fixedly connected to the first fixed installation column, and the first linkage clamping seat is provided with a first accommodating groove corresponding to the first constant force spring in a one-to-one manner, the opening of the first accommodating groove is horizontally facing the first fixed installation column, and the coil spring part of the first constant force spring is movably accommodated in the first accommodating groove in a one-to-one manner; The first grading positioning member is integrally formed or fixedly connected to the first fixed mounting column, and a plurality of first positioning slots are formed on the first grading positioning member, and the first positioning slots are distributed spaced apart in the vertical direction; the upper end of the first swing clamping member is pivotally connected to the inner side wall of the first lifting sleeve, and the lower end of the first swing clamping member can be selectively engaged in the first positioning slot at any position; the first elastic member abuts between the inner side wall of the first lifting sleeve and the first swing clamping member, and the first elastic member constantly drives the first swing clamping member to swing in the direction of engaging with the first positioning slot facing it; the first release slide moves vertically on at least one of the first fixed mounting column and the first grading positioning member, the first traction member moves vertically on at least one of the first fixed mounting column and the first grading positioning member, the first release slide is fixedly connected to the lower end of the first traction member, and the upper end of the first traction member extends to the top of the first lifting sleeve; the first release slide can push the first swing clamping member to disengage from the engaged first positioning slot; The second stage lifting leg further comprises: a second fixed mounting column, a second linkage clamping seat, a second stage positioning member, a second swing clamping member, a second elastic member, a second release sliding seat, a second traction member and a plurality of second constant force springs. The second fixed installation column is vertically fixed on the second support base, and the second fixed installation column is inserted into the second lifting sleeve with a gap; the second linkage clamping seat is vertically fixed on the inner side wall of the second lifting sleeve, the fixing part of the second constant force spring is fixedly connected to the second fixed installation column, and the second linkage clamping seat is provided with a second accommodating groove corresponding to the second constant force spring in a one-to-one manner, the second accommodating groove opening is horizontally facing the second fixed installation column, and the coil spring part of the second constant force spring is movably accommodated in the second accommodating groove in a one-to-one manner; The second grading positioning member is integrally formed or fixedly connected to the second fixed mounting column, and a plurality of second positioning slots are formed on the second grading positioning member, and the second positioning slots are distributed at intervals in the vertical direction; the upper end of the second swing clamping member is pivotally connected to the inner side wall of the second lifting sleeve, and the lower end of the second swing clamping member can be selectively engaged in the second positioning slot at any position; the second elastic member abuts between the inner side wall of the second lifting sleeve and the second swing clamping member, and the second elastic member constantly drives the second swing clamping member to swing in the direction of engaging with the second positioning slot facing it; the second release slide moves vertically on at least one of the second fixed mounting column and the second grading positioning member, and the second traction member moves vertically on at least one of the second fixed mounting column and the second grading positioning member, the second release slide is fixedly connected to the lower end of the second traction member, and the upper end of the second traction member extends to the top of the second lifting sleeve; the second release slide can push the second swing clamping member out of the engaged second positioning slot.

3. The synchronous lifting table according to claim 2, characterized in that: The synchronous release mechanism comprises: a first vertical pull rod, a first swing arm, a second vertical pull rod, a second swing arm and a release linkage rod. The first vertical pull rod is vertically movable on the first connecting seat, and the lower end of the first vertical pull rod is connected to the upper end of the first traction member; the first pivoting portion and the second pivoting portion are formed on the first swing arm, and the first pivoting portion and the second pivoting portion are spaced apart from each other along the length direction of the first swing arm; The first pivoting portion is horizontally pivoted to the first connecting seat, and the second pivoting portion is horizontally pivoted to the upper end of the first vertical pull rod; The second vertical pull rod is vertically movable and arranged on the second connecting seat, and the lower end of the second vertical pull rod is connected to the upper end of the second traction member; a third pivoting portion and a fourth pivoting portion are formed on the second swing arm, and the third pivoting portion and the fourth pivoting portion are arranged spaced apart along the length direction of the second swing arm; The third pivoting portion is horizontally pivoted to the second connecting seat, and the fourth pivoting portion is horizontally pivoted to the upper end of the second vertical pull rod; The rotation axis centerline of the first pivoting portion and the rotation axis centerline of the third pivoting portion are both arranged in the left-right direction, and the rotation axis centerline of the first pivoting portion coincides with the rotation axis centerline of the third pivoting portion; The release linkage rod is fixedly connected between the first pivoting portion and the third pivoting portion along a rotation axis of the first pivoting portion.

4. The synchronous lifting table according to claim 3, characterized in that: A fifth pivoting portion is also formed on the first swing arm, and the first pivoting portion is located between the fifth pivoting portion and the second pivoting portion along the length direction of the first swing arm; The synchronous lock release mechanism further includes: a first lock release swinging member, the first lock release swinging member is pivotally connected to the first connecting seat, and the rotation axis of the first lock release swinging member is arranged along the left-right direction; One end of the first unlocking swing member is pivotally connected to the fifth pivoting portion, the other end of the first unlocking swing member forms a first unlocking operating portion, and the rotation axis of the first unlocking swing member is located between the fifth pivoting portion and the first unlocking operating portion.

5. The synchronous lifting table according to claim 4, characterized in that: A sixth pivoting portion is also formed on the second swing arm, and the third pivoting portion is located between the sixth pivoting portion and the fourth pivoting portion along the length direction of the second swing arm; The synchronous lock release mechanism further includes: a second lock release swinging member, the second lock release swinging member is pivotally connected to the second connecting seat, and the rotation axis of the second lock release swinging member is arranged along the left-right direction; One end of the second lock release swinging member is pivotally connected to the sixth pivoting portion, the other end of the second lock release swinging member forms a second lock release operating portion, and the rotation axis of the second lock release swinging member is located between the sixth pivoting portion and the second lock release operating portion.

6. The synchronous lifting table according to claim 3, characterized in that: A fifth pivoting portion is also formed on the first swing arm, and the first pivoting portion is located between the fifth pivoting portion and the second pivoting portion along the length direction of the first swing arm; The synchronous release mechanism also includes: a first linkage slide, a first release swing member and a first linkage swing arm. The first linkage slide is slidably disposed on the first connection seat along the front-to-back direction, a first elongated guide hole penetrating along the left-to-right direction is formed on the first linkage slide, the length direction of the first elongated guide hole is obliquely arranged along the front-to-back direction, and the fifth pivot portion is slidably connected in the first elongated guide hole; The first lock-releasing swinging member is pivotally connected to the first connecting seat, and the rotation axis of the first lock-releasing swinging member is arranged in the left-right direction; a first lock-releasing operating portion is formed at one end of the first lock-releasing swinging member, and a first swing pivot portion is formed at the other end of the first lock-releasing swinging member, and the rotation axis of the first lock-releasing swinging member is located between the first lock-releasing operating portion and the first swing pivot portion; One end of the first linked swing arm is pivotally connected to the fifth pivot portion, the other end of the first linked swing arm is pivotally connected to the first swing pivot portion, and the pivot axis lines at both ends of the first linked swing arm are arranged along the left-right direction.

7. The synchronous lifting table according to claim 6, characterized in that: A sixth pivoting portion is also formed on the second swing arm, and the third pivoting portion is located between the sixth pivoting portion and the fourth pivoting portion along the length direction of the second swing arm; The synchronous release mechanism also includes: a second linkage slide, a second release swing member and a second linkage swing arm. The second linkage slide is slidably disposed on the second connection seat along the front-to-back direction, and a second elongated guide hole penetrating along the left-to-right direction is formed on the second linkage slide. The length direction of the second elongated guide hole is obliquely arranged along the front-to-back direction, and the sixth pivot portion is slidably connected to the second elongated guide hole; The second lock-releasing swinging member is pivotally connected to the second connecting seat, and the rotation axis of the second lock-releasing swinging member is arranged along the left-right direction; A second unlocking operation portion is formed at one end of the second unlocking swinging member, a second swinging pivot portion is formed at the other end of the second unlocking swinging member, and a rotation axis of the second unlocking swinging member is located between the second unlocking operation portion and the second swinging pivot portion; One end of the second linked swing arm is pivotally connected to the sixth pivot portion, the other end of the second linked swing arm is pivotally connected to the second swing pivot portion, and the pivot axis lines at both ends of the second linked swing arm are arranged along the left-right direction.

8. The synchronous lifting table according to any one of claims 2 to 7, characterized in that: Also includes: A first connecting sleeve and a second connecting sleeve, wherein the first connecting sleeve is fixedly connected between the first vertical sleeve and the second vertical sleeve along the left-right direction; and the second connecting sleeve is fixedly connected between the first connecting seat and the second connecting seat along the left-right direction.

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