CN116250688A - Multifunctional office desk - Google Patents

Abstract

The utility model provides a multifunctional office table, relates to desk technical field, including first fixed block, seat adjusting device, fixed landing leg, slider, fixed seat and fixed desktop, be equipped with seat adjusting device on the first fixed block, be equipped with fixed landing leg and slider on the seat adjusting device, be equipped with fixed desktop on the fixed landing leg, be equipped with fixed seat on the slider, slider comprises horizontal slide and vertical slide, and horizontal slide is connected with seat adjusting device, is equipped with vertical slide on the horizontal slide, is equipped with fixed seat on the vertical slide; the invention has reasonable and practical structure and simple operation, combines the office table and the office chair, is convenient for adjusting the angle of the office table top, is convenient for the office chair to move back and forth and left and right, prevents noise from being generated in the movement of the office chair, is convenient for adjusting the angle of the office chair, and improves the convenience of the office table in use.

Description

Multifunctional office desk

Technical Field

The invention relates to the technical field of office tables, in particular to a multifunctional office table.

Background

The office desk is characterized in that the office desk is a desk which is provided with office chairs for convenience in daily life work and social activities, the office desk is used together with the office chairs, the office chairs are usually separated from the office desk, the angles of the desk top and desk legs are sometimes required to be adjusted according to personal habits and comfort level, meanwhile, the office chairs matched with the office desk are divided into two types, one type is a position connected with the ground through supporting legs, the other type is a position connected with the ground through pulleys, the office chairs connected with the ground through the supporting legs are inconvenient to move, comfort level is poor, the office chairs are sliding on the ground through the positions connected with the pulleys, noise is generated due to sliding, the noise is not only influenced by nearby associates, but also influenced by people under building, particularly at quiet night, when the office chairs are suitable for sliding on the wood floor, the pulleys can leave marks on the wood floor for a long time, and therefore, the multifunctional office desk is provided.

Disclosure of Invention

In order to overcome the defects in the background technology, the invention discloses a multifunctional office table, wherein a seat adjusting device is fixed at a specified position through a first fixed block, the angle of a fixed seat is adjusted through the seat adjusting device, a fixed tabletop is fixed and the angle is adjusted through fixed support legs, and the fixed seat is moved back and forth and left and right through a sliding device, so that the aim of combining the office table and the office chair is fulfilled.

In order to achieve the aim, the invention adopts the following technical proposal

The utility model provides a multifunctional office table, includes first fixed block, seat adjusting device, fixed landing leg, slider, fixed seat and fixed desktop, is equipped with seat adjusting device on the first fixed block, is equipped with fixed landing leg and slider on the seat adjusting device, is equipped with fixed desktop on the fixed landing leg, is equipped with fixed seat on the slider, and slider comprises horizontal slide and vertical slide, and horizontal slide is connected with seat adjusting device, is equipped with vertical slide on the horizontal slide, is equipped with fixed seat on the vertical slide.

The first fixed blocks are of trapezoid structures, the first fixed blocks are arranged in pairs, and a seat adjusting device is arranged on the upper surface of each first fixed block.

The seat adjusting device comprises a twelfth fixed block, a second fixed block, a hinge, a first electric telescopic rod and a first fixed ball, wherein the twelfth fixed block is arranged on the first fixed block, one end of the twelfth fixed block is provided with the second fixed block, one end of the second fixed block is connected with the twelfth fixed block, the other end of the second fixed block is provided with the hinge, the hinge is provided with a transverse slideway, the upper face of the twelfth fixed block is provided with a fixed supporting leg, the upper face of the other end of the twelfth fixed block is provided with a first groove, the bottom of the first groove on the twelfth fixed block is provided with a first fixed hole, the first fixed hole on the twelfth fixed block is internally provided with the first electric telescopic rod, one end of the first electric telescopic rod is fixed in the first fixed hole on the twelfth fixed block, and the other end of the first electric telescopic rod is provided with the first fixed ball.

The transverse slideway is composed of a fourth fixed block, a third fixed block and a fifth fixed block, wherein the second fixed block is respectively provided with a second fixed hole at two ends of the front surface, the second fixed holes on the third fixed block are used for fixing hinges, the third fixed block is movably connected with the second fixed block through the hinges, the upper surface of the third fixed block is provided with a second groove which is of a convex structure, the second groove on the third fixed block is internally provided with a longitudinal slideway, the lower surface of the third fixed block is provided with the fourth fixed block, at least one fourth fixed block is arranged, one end of the fourth fixed block is connected with the third fixed block, the other end of the fourth fixed block is provided with a fifth fixed block, the fifth fixed block is communicated with the third fixed block in shape, two ends of the lower surface of the fifth fixed block are respectively provided with a first fixed ring, and the first electric telescopic rod is movably connected with the fifth fixed block through a first fixed ball.

The longitudinal slideway is composed of a seventh fixing block, a sixth fixing block, a first fixing plate and an eighth fixing block, wherein at least one eighth fixing block is arranged, both ends of the eighth fixing block are respectively provided with a seventh fixing block, the upper surface of the seventh fixing block is provided with a third groove at the end close to the front surface, the third groove is of a convex structure, a fixed seat is arranged in the third groove on the seventh fixing block, both ends of the lower surface of the seventh fixing block are respectively provided with a sixth fixing block, a first fixing plate on the sixth fixing block is provided with balls on the lower surface of the first fixing plate, the first fixing plate is arranged in the second groove on the third fixing block, and the first fixing plate is movably connected with the third fixing block.

The fixed seat comprises a second fixed plate, a ninth fixed block, a third fixed plate, a second electric telescopic rod and a seat, wherein the ninth fixed block is arranged on the lower surface of the third fixed plate at a position corresponding to a third groove on the seventh fixed block, the second fixed plate is arranged on the ninth fixed block, a ball is arranged on the lower surface of the second fixed plate, the second fixed plate is arranged in the third groove on the seventh fixed block, the second fixed plate is movably connected with the seventh fixed block, the second electric telescopic rod is arranged on the third fixed plate, the seat is arranged on the second electric telescopic rod, and the seat is movably connected with the third fixed plate through the second electric telescopic rod.

The fixed landing leg comprises mount, the support frame, the fourth fixed plate, the third electric telescopic handle, the second fixed ball, tenth fixed block and fixed column, the mount is "L" structure, establish on the twelfth fixed block on the one end of mount, the mount is equipped with the fifth fixed orifices on the position corresponding with first recess on the twelfth fixed block, be equipped with the fourth fixed plate on the other end of mount, the one end of fourth fixed plate is perpendicular with the mount setting, the upper portion face of fourth fixed plate is equipped with the third fixed orifices on being close to one side of mount, be equipped with the third electric telescopic handle on the third fixed plate in the third fixed orifices on the fourth fixed plate, be equipped with the second fixed ball on the second fixed ball, be equipped with the fixed desktop on the other end of the upper portion face of fourth fixed plate, the both sides of tenth fixed block all are equipped with the fixed column, be equipped with the mount between mount and the fourth fixed plate.

The fixed tabletop consists of a tabletop, an eleventh fixed block and a second fixed ring, wherein the eleventh fixed block is arranged on the position, corresponding to the tenth fixed block, of the fourth fixed plate on the two sides of the lower surface of the tabletop, the upper surface of the eleventh fixed block is connected with the tabletop, the lower surface of the eleventh fixed block is provided with a fourth groove, the side surface of the eleventh fixed block is provided with a fourth fixed hole, the fourth fixed hole penetrates through the eleventh fixed block, the tenth fixed block is arranged in the fourth groove of the eleventh fixed block, the tenth fixed block is movably connected with the eleventh fixed block through a fixed column, the second fixed ring is arranged on the position, corresponding to the third fixed hole on the fourth fixed plate, of the two sides of the lower surface of the tabletop, and the third electric telescopic rod is arranged in the second fixed ring through a second fixed ball and is movably connected with the tabletop.

Due to the adoption of the technical scheme, the invention has the following beneficial effects:

according to the multifunctional office table, the stopper rod is placed through the first fixing block, the seat adjusting device is fixed at the designated position through the first fixing block, the angle of the fixed seat is adjusted through the seat adjusting device, the fixed tabletop is fixed and the angle is adjusted through the fixed supporting legs, and the fixed seat is moved back and forth and left and right through the sliding device, so that the aim of combining the office table with the office chair is fulfilled; the invention has reasonable and practical structure and simple operation, combines the office table and the office chair, is convenient for adjusting the angle of the office table top, is convenient for the office chair to move back and forth and left and right, prevents noise from being generated in the movement of the office chair, is convenient for adjusting the angle of the office chair, and improves the convenience of the office table in use.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic view of a seat adjusting device according to the present invention;

FIG. 3 is a schematic view of a sliding device assembly according to the present invention;

FIG. 4 is a schematic view of a stationary seat structure according to the present invention;

FIG. 5 is a schematic view of a fixed leg structure of the present invention;

FIG. 6 is a schematic view of a stationary table top according to the present invention;

1. a first fixed block; 2. a seat adjusting device; 3. a sliding device; 4. fixing the seat; 5. a fixed support leg; 6. a fixed tabletop; 7. a twelfth fixing block; 8. a second fixed block; 9. a hinge; 10. a first groove; 11. a first fixing hole; 12. a first electric telescopic rod; 13. a first fixed ball; 14. a transverse slideway; 15. a longitudinal slideway; 16. a second groove; 17. a third fixed block; 18. a second fixing hole; 19. a fourth fixed block; 20. a fifth fixed block; 21. a first fixing ring; 22. a first fixing plate; 23. a sixth fixed block; 24. a third groove; 25. a seventh fixed block; 26. an eighth fixed block; 27. a second fixing plate; 28. a ninth fixed block; 29. a third fixing plate; 30. a fifth fixing hole; 31. a second electric telescopic rod; 32. a seat; 33. a second fixed ball; 34. a third electric telescopic rod; 35. a third fixing hole; 36. a fourth fixing plate; 37. a fixing frame; 38. a support frame; 39. a tenth fixed block; 40. fixing the column; 41. a tabletop; 42. a fourth fixing hole; 43. an eleventh fixing block; 44. a fourth groove; 45. and a second fixing ring.

Detailed Description

The invention will be explained in more detail by the following examples, the purpose of which is to protect all technical improvements within the scope of the invention.

The multifunctional office table comprises a first fixed block 1, a seat adjusting device 2, fixed supporting legs 5, a sliding device 3, a fixed seat 4 and a fixed tabletop 6, wherein the seat adjusting device 2 is arranged on the first fixed block 1, the fixed supporting legs 5 and the sliding device 3 are arranged on the seat adjusting device 2, the fixed tabletop 6 is arranged on the fixed supporting legs 5, the fixed seat 4 is arranged on the sliding device 3, the sliding device 3 consists of a transverse slideway 14 and a longitudinal slideway 15, the transverse slideway 14 is connected with the seat adjusting device 2, the longitudinal slideway 15 is arranged on the transverse slideway 14, and the fixed seat 4 is arranged on the longitudinal slideway 15.

The first fixing blocks 1 are of trapezoid structures, the first fixing blocks 1 are arranged in pairs, and the seat adjusting device 2 is arranged on the upper face of each first fixing block 1.

The seat adjusting device 2 is composed of a twelfth fixed block 7, a second fixed block 8, a hinge 9, a first electric telescopic rod 12 and a first fixed ball 13, wherein the twelfth fixed block 7 is arranged on the first fixed block 1, one end of the twelfth fixed block 7 is provided with the second fixed block 8, one end of the second fixed block 8 is connected with the twelfth fixed block 7, the other end of the second fixed block 8 is provided with the hinge 9, the hinge 9 is provided with a transverse slideway 14, the upper surface of the twelfth fixed block 7 is provided with a fixed supporting leg 5, the upper surface of the other end of the twelfth fixed block 7 is provided with a first groove 10, the bottom of the first groove 10 on the twelfth fixed block 7 is provided with a first fixed hole 11, the first fixed hole 11 on the twelfth fixed block 7 is internally provided with a first electric telescopic rod 12, one end of the first electric telescopic rod 12 is fixed in the first fixed hole 11 on the twelfth fixed block 7, and the other end of the first electric telescopic rod 12 is provided with the first fixed ball 13.

The transverse slideway 14 is composed of a fourth fixed block 19, a third fixed block 17 and a fifth fixed block 20, the second fixed block 17 is provided with second fixed holes 18 at two ends of the front surface, the second fixed holes 18 on the third fixed block 17 are used for fixing the hinge 9, the third fixed block 17 is movably connected with the second fixed block 8 through the hinge 9, the upper surface of the third fixed block 17 is provided with a second groove 16, the second groove 16 is of a convex structure, the second groove 16 on the third fixed block 17 is internally provided with a longitudinal slideway 15, the lower surface of the third fixed block 17 is provided with a fourth fixed block 19, at least one fourth fixed block 19 is arranged, one end of the fourth fixed block 19 is connected with the third fixed block 17, the other end of the fourth fixed block 19 is provided with a fifth fixed block 20, the fifth fixed block 20 is communicated with the structure of the third fixed block 17, two ends of the fifth fixed block 20 on the lower surface are provided with a first fixed ring 21, and the first electric telescopic rod 12 is movably connected with the fifth fixed block 20 through the first fixed ball 13.

The longitudinal slide 15 is composed of a seventh fixing block 25, a sixth fixing block 23, a first fixing plate 22 and an eighth fixing block 26, at least one eighth fixing block 26 is arranged, both ends of the eighth fixing block 26 are respectively provided with a seventh fixing block 25, the upper surface of the seventh fixing block 25 is provided with a third groove 24 at the end close to the front surface, the third groove 24 is of a convex structure, a fixed seat 4 is arranged in the third groove 24 on the seventh fixing block 25, both ends of the lower surface of the seventh fixing block 25 are respectively provided with a sixth fixing block 23, a first fixing plate 22 on the sixth fixing block 23 is provided with a ball on the lower surface of the first fixing plate 22, the first fixing plate 22 is arranged in the second groove 16 on the third fixing block 17, and the first fixing plate 22 is movably connected with the third fixing block 17.

The fixed seat 4 is composed of a second fixed plate 27, a ninth fixed plate 28, a third fixed plate 29, a second electric telescopic rod 31 and a seat 32, the ninth fixed plate 28 is arranged on the lower surface of the third fixed plate 29 at a position corresponding to the third groove 24 on the seventh fixed plate 25, the second fixed plate 27 is arranged on the ninth fixed plate 28, balls are arranged on the lower surface of the second fixed plate 27, the second fixed plate 27 is arranged in the third groove 24 on the seventh fixed plate 25, the second fixed plate 27 is movably connected with the seventh fixed plate 25, the third fixed plate 29 is provided with the second electric telescopic rod 31, the second electric telescopic rod 31 is provided with the seat 32, and the seat 32 is movably connected with the third fixed plate 29 through the second electric telescopic rod 31.

The fixed leg 5 is composed of a fixing frame 37, a supporting frame 38, a fourth fixing plate 36, a third electric telescopic rod 34, a second fixing ball 33, a tenth fixing block 39 and a fixing column 40, the fixing frame 37 is of an L-shaped structure, one end of the fixing frame 37 is arranged on the twelfth fixing block 7, a fifth fixing hole 30 is formed in a position, corresponding to the first groove 10 in the twelfth fixing block 7, of the fixing frame 37, a fourth fixing plate 36 is arranged on the other end of the fixing frame 37, one end of the fourth fixing plate 36 is vertically arranged with the fixing frame 37, a third fixing hole 35 is formed in the upper surface of the fourth fixing plate 36, a third electric telescopic rod 34 is arranged in the third fixing hole 35 in the fourth fixing plate 36, a second fixing ball 33 is arranged on the third electric telescopic rod 34, a fixing table top 6 is arranged on the second fixing ball 33, a fixing column 40 is arranged on two sides of the tenth fixing block 39, and a fixing column 37 is arranged between the fixing frame 37 and the fourth fixing plate 36.

The fixed table top 6 is composed of a table top 41, an eleventh fixing block 43 and a second fixing ring 45, wherein the eleventh fixing block 43 is arranged on two sides of the lower surface of the table top 41 at a position corresponding to the tenth fixing block 39 on the fourth fixing plate 36, the upper surface of the eleventh fixing block 43 is connected with the table top 41, a fourth groove 44 is arranged on the lower surface of the eleventh fixing block 43, a fourth fixing hole 42 is arranged on the side surface of the eleventh fixing block 43, the fourth fixing hole 42 penetrates through the eleventh fixing block 43, the tenth fixing block 39 is arranged in the fourth groove 44 of the eleventh fixing block 43, the tenth fixing block 39 is movably connected with the eleventh fixing block 43 through a fixing column 40, the second fixing ring 45 is arranged on two sides of the lower surface of the table top 41 at a position corresponding to the third fixing hole 35 on the fourth fixing plate 36, and the third electric telescopic rod 34 is arranged in the second fixing ring 45 through the second fixing ball 33 and movably connected with the table top 41.

In the embodiment 1, the seat adjusting device 2 is fixed at a designated position by the first fixing block 1, the angle between the transverse slideway 14 and the first fixing block 1 is adjusted by the extension of the first electric telescopic rod 12, the first electric telescopic rod 12 is arranged in the first fixing ring 21 by the first fixing ball 13 and is movably connected with the fifth fixing block 20, the transverse slideway 14 is movably connected with the seat adjusting device 2 by the hinge 9, the longitudinal slideway 15 is clamped into the second groove 16 on the transverse slideway 14 by the first fixing plate 22 and is movably connected with the second groove, the friction force is reduced by the balls on the first fixing plate 22 when the longitudinal slideway 15 slides left and right on the transverse slideway 14, the seat 4 is fixed on the longitudinal slideway 15, the second fixing plate 27 is arranged in the third groove 24 on the seventh fixing block 25, the balls on the second fixing plate 27 reduce friction force during sliding, the fixed seat 4 moves back and forth on the longitudinal slideway 15, the seat 32 is driven to move up and down by the second electric telescopic rod 31 on the fixed seat 4, the fixed tabletop 6 is supported and fixed by the fixing support legs 5, the tenth fixing block 39 is arranged in the fourth groove 44 of the eleventh fixing block 43, the tenth fixing block 39 is movably connected with the eleventh fixing block 43 through the fixing column 40, the third electric telescopic rod 34 is movably connected with the tabletop 41 through the second fixing ball 33, and the tabletop 41 is adjusted in angle by the extension of the third electric telescopic rod 34; the invention has reasonable and practical structure and simple operation, combines the office table and the office chair, is convenient for adjusting the angle of the office table top, is convenient for the office chair to move back and forth and left and right, prevents noise from being generated in the movement of the office chair, is convenient for adjusting the angle of the office chair, and improves the convenience of the office table in use.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (8)

1. The utility model provides a multifunctional office table, includes first fixed block (1), seat adjusting device (2), fixed landing leg (5), slider (3), fixed seat (4) and fixed desktop (6), is equipped with seat adjusting device (2) on first fixed block (1), is equipped with fixed landing leg (5) and slider (3) on seat adjusting device (2), is equipped with fixed desktop (6) on fixed landing leg (5), is equipped with fixed seat (4) on slider (3), characterized by: the sliding device (3) is composed of a transverse slideway (14) and a longitudinal slideway (15), the transverse slideway (14) is connected with the seat adjusting device (2), the longitudinal slideway (15) is arranged on the transverse slideway (14), and the fixed seat (4) is arranged on the longitudinal slideway (15).

2. A multi-function desk as claimed in claim 1, wherein: the first fixing blocks (1) are of trapezoid structures, the first fixing blocks (1) are arranged in pairs, and a seat adjusting device (2) is arranged on the upper surface of each first fixing block (1).

3. A multi-function desk according to claim 2, wherein: the seat adjusting device (2) comprises a twelfth fixed block (7), a second fixed block (8), a hinge (9), a first electric telescopic rod (12) and a first fixed ball (13), wherein the twelfth fixed block (7) is arranged on the first fixed block (1), the second fixed block (8) is arranged at one end of the twelfth fixed block (7), one end of the second fixed block (8) is connected with the twelfth fixed block (7), the hinge (9) is arranged at the other end of the second fixed block (8), a transverse slideway (14) is arranged on the hinge (9), a fixed supporting leg (5) is arranged on the upper surface of the twelfth fixed block (7), a first groove (10) is arranged on the upper surface of the other end of the twelfth fixed block (7), a first fixed hole (11) is formed in the bottom of the first groove (10) on the twelfth fixed block (7), a first electric telescopic rod (12) is arranged in the first fixed hole (11) on the twelfth fixed block (7), and one end of the first electric telescopic rod (12) is fixed at the first fixed hole (11) on the twelfth fixed block (7).

4. A multi-function desk according to claim 3, wherein: the transverse slideway (14) is composed of a fourth fixed block (19), a third fixed block (17) and a fifth fixed block (20), wherein the second fixed holes (18) are formed in the two ends of the front surface of the third fixed block (17), the second fixed holes (18) in the third fixed block (17) are used for fixing the hinge (9), the third fixed block (17) is movably connected with the second fixed block (8) through the hinge (9), the second groove (16) is formed in the upper surface of the third fixed block (17), the second groove (16) is of a convex structure, a longitudinal slideway (15) is arranged in the second groove (16) in the third fixed block (17), the fourth fixed block (19) is arranged on the lower surface of the third fixed block (17), one end of the fourth fixed block (19) is connected with the third fixed block (17), the fifth fixed block (20) is arranged on the other end of the fourth fixed block (19), the fifth fixed block (20) is in a telescopic structure in the fifth fixed block (20), and the second fixed block (17) is connected with the first fixed ring (21) through the second telescopic ring (21).

5. The multi-purpose desk of claim 4, wherein: the longitudinal slide way (15) is composed of a seventh fixing block (25), a sixth fixing block (23), a first fixing plate (22) and an eighth fixing block (26), wherein at least one eighth fixing block (26) is arranged, the seventh fixing block (25) is arranged at two ends of the eighth fixing block (26), a third groove (24) is formed in the upper surface of the seventh fixing block (25) at the end close to the front surface, the third groove (24) is of a convex structure, a fixing seat (4) is arranged in the third groove (24) in the seventh fixing block (25), the sixth fixing block (23) is arranged at two ends of the lower surface of the seventh fixing block (25), a first fixing plate (22) in the sixth fixing block (23), balls are arranged on the lower surface of the first fixing plate (22), the first fixing plate (22) is arranged in the second groove (16) in the third fixing block (17), and the first fixing plate (22) is movably connected with the third fixing block (17).

6. A multi-function desk as claimed in claim 5, wherein: the fixed seat (4) comprises a second fixed plate (27), a ninth fixed block (28), a third fixed plate (29), a second electric telescopic rod (31) and a seat (32), wherein the ninth fixed block (28) is arranged on the lower surface of the third fixed plate (29) at a position corresponding to a third groove (24) on the seventh fixed block (25), the second fixed plate (27) is arranged on the ninth fixed block (28), balls are arranged on the lower surface of the second fixed plate (27), the second fixed plate (27) is arranged in the third groove (24) on the seventh fixed block (25), the second fixed plate (27) is movably connected with the seventh fixed block (25), the second electric telescopic rod (31) is arranged on the third fixed plate (29), and the seat (32) is movably connected with the third fixed plate (29) through the second electric telescopic rod (31).

7. A multi-function desk as claimed in claim 6, wherein: the fixed support leg (5) is composed of a fixed frame (37), a supporting frame (38), a fourth fixed plate (36), a third electric telescopic rod (34), a second fixed ball (33), a tenth fixed block (39) and a fixed column (40), wherein the fixed frame (37) is of an L-shaped structure, one end of the fixed frame (37) is arranged on the twelfth fixed block (7), the fixed frame (37) is provided with a fifth fixed hole (30) at a position corresponding to a first groove (10) on the twelfth fixed block (7), the other end of the fixed frame (37) is provided with a fourth fixed plate (36), one end of the fourth fixed plate (36) is vertically arranged with the fixed frame (37), the upper surface of the fourth fixed plate (36) is provided with a third fixed hole (35) on one side close to the fixed frame (37), a third electric telescopic rod (34) is arranged in the third fixed hole (35) on the fourth fixed plate (36), the third electric telescopic rod (34) is provided with a second fixed ball (33), the second fixed ball (33) is provided with a fixed plate (6) on the position corresponding to the first groove (10) on the twelfth fixed block (7), the other end of the fixed plate (36) is vertically arranged with the fixed frame (37), the upper surface of the fourth fixed plate (36) is provided with the third fixed block (35) is provided with the third fixed column (35), a fixing frame (37) is arranged between the fixing frame (37) and the fourth fixing plate (36).

8. A multi-function desk as claimed in claim 7, wherein: the fixed tabletop (6) is composed of a tabletop (41), an eleventh fixed block (43) and a second fixed ring (45), wherein the eleventh fixed block (43) is arranged on two sides of the lower surface of the tabletop (41) at positions corresponding to the tenth fixed block (39) on the fourth fixed plate (36), the upper surface of the eleventh fixed block (43) is connected with the tabletop (41), a fourth groove (44) is arranged on the lower surface of the eleventh fixed block (43), a fourth fixed hole (42) is arranged on the side surface of the eleventh fixed block (43), the fourth fixed hole (42) penetrates through the eleventh fixed block (43), the tenth fixed block (39) is arranged in the fourth groove (44) of the eleventh fixed block (43), the tenth fixed block (39) is movably connected with the eleventh fixed block (43) through a fixed column (40), the second fixed ring (45) is arranged on two sides of the lower surface of the tabletop (41) at positions corresponding to the third fixed hole (35) on the fourth fixed plate (36), and the third electric rod (34) penetrates through the eleventh fixed block (43) and is movably connected with the second fixed ring (41).

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