CN112244543B

CN112244543B - Office table capable of being spliced and expanded

Info

Publication number: CN112244543B
Application number: CN202011150538.2A
Authority: CN
Inventors: 吴利伟
Original assignee: Wuhan Huadu Technology Group Co ltd
Current assignee: WUHAN HUADU TECHNOLOGY GROUP CO.,LTD.
Priority date: 2020-10-24
Filing date: 2020-10-24
Publication date: 2021-11-19
Anticipated expiration: 2040-10-24
Also published as: CN112244543A

Abstract

When the desktop needs to be expanded, the square plate A is turned outwards, and then a support in the square plate A is unfolded to support the square plate A to complete expansion; when square board A need inwards overturn, use the crank to rotate screw rod A, screw rod A takes bevel gear B to rotate, bevel gear B takes bevel gear A to rotate, bevel gear A takes pulley B to rotate, pulley B takes pulley A to rotate through belt A, pulley A takes gear A to rotate, gear A takes square board A to rotate and accomplishes the upset, square board A has been realized rotating at the uniform velocity according to the speed of shaking, the stability has been improved, square board A's rotation about having realized, the extension desktop has been accomplished and the table board has been covered.

Description

Office table capable of being spliced and expanded

Technical Field

The invention relates to the technical field of office table equipment, in particular to an office table capable of being spliced and expanded.

Background

Present desk can only be the desk, can not be used for using as the conference table, if want to piece together its use, one of them because the baffle is the fixed extravagant very big space of baffle of piecing together, the conversation is also very inconvenient, private article on its two desktops are a lot of, it is also very troublesome to pick up, there is very little practicality, therefore need a can splice the desk of extension, descend the desktop, the baffle is set level and is made integrative, it is very convenient also need not pick up the original thing on the desktop to splice very save time, the baffle of laying down can also lock and increase security, have very big practicality.

Disclosure of Invention

Aiming at the problems, the invention provides an office table capable of being spliced and expanded, when a conference table needs to be spliced, a plurality of office tables are fixed by a clamping hole and a clamping block, a groove at one end of one screw A is sleeved on a bulge of the other screw A, the screw A is rotated by using a crank, the screw A drives a square thread block, a bevel gear B and a pulley D to rotate, the square thread block drives an elliptic slide block to move forwards, the elliptic slide block drives a U-shaped strip, a bracket A and a table plate to move downwards to finish the descending of the table top, the bevel gear B drives the bevel gear A to rotate, the bevel gear A drives the pulley B to rotate, the pulley B drives the pulley A to rotate through a belt A, the pulley A drives the gear A to rotate, the square plate A rotates to cover the descended table top, the pulley D drives the pulley C to rotate through the belt B, the pulley C drives the bevel gear C to rotate, bevel gear C drives bevel gear D, gear C and rotates, gear C drives gear B and rotates, gear B drives screw rod B and rotates, screw rod B drives square board B and moves down and hides square board B to the inside of rectangular box completely, makes the conference table synchronous deformation that the concatenation got up.

The technical scheme adopted by the invention is as follows: a tileable extended desk, comprising: the desk comprises a desk body, a desktop lifting structure, a baffle inwards-turning structure and a baffle lifting structure; the office table body is a table which can be spliced, and can be used as a single table for a single person and can be used as a conference table for a plurality of persons; the desktop lifting structure, the baffle inward-turning structure and the baffle lifting structure are arranged inside the office desk body; the desktop lifting structure is positioned in the middle of the interior of the office desk body, and realizes the function of moving the desktop up and down; the baffle plate inward-turning structures are positioned at two ends of the desktop lifting structure, and the baffle plate inward-turning structures realize the function of turning the baffle plates at two sides; baffle elevation structure is located the innermost of the internal portion of desk, and baffle elevation structure has realized the function that reciprocates the backplate.

Further, the desk body includes: the device comprises a clamping hole, a round hole, a rotating wheel, a round groove, a square groove, a clamping block, a square plate and a rectangular box body; the rectangular box body is a shell of the whole office table; the clamping hole is arranged on the right side plate of the rectangular box body; the fixture block is arranged on the left side plate of the rectangular box body; the circular holes are arranged between the two side plates of the rectangular box body; the rotating wheels are arranged at the bottom of the rectangular box body; the circular groove is arranged on the inner side surface of the top of the rectangular box body; the square groove is arranged in the rectangular box body rear plate; the square plate is fixedly arranged on the bottom plate in the rectangular box body.

Further, the desktop elevation structure includes: the table comprises a table plate, a screw A, a square thread block, an oval slide block, a bracket A, U-shaped bar, a bracket B, a sleeve A, a sleeve B and a crank; the screw A is rotatably arranged in the round hole; the table plate is slidably arranged in the rectangular box body; the threads inside the square thread block are matched with the threads on the screw A; the elliptic slide block is fixedly arranged at the shaft end part on the square thread block and is arranged in the U-shaped strip in a sliding way; the bracket A is fixedly arranged at the bottom of the desk plate, a spring is arranged in the bracket A, the upper end of the spring is connected with the bracket A, and the lower end of the spring is connected with the U-shaped strip; the upper rod of the U-shaped strip is slidably arranged in a sleeve below the support A, the lower rod of the U-shaped strip is slidably arranged in a sleeve above the support B, the lower end of the support B is slidably arranged in a sleeve of the sleeve A, a spring is arranged in the support B and is a top spring, one end of the spring is connected with the support B, and the other end of the spring is connected with the U-shaped strip; the sleeve B is fixedly arranged on a bottom plate in the rectangular box body, a spring is arranged in the sleeve B, the lower end of the spring is connected with the sleeve B, and the upper end of the spring is connected with the bottom of the sleeve A; sleeve pipe A slidable mounting is inside sleeve pipe B, and sleeve pipe A is inside to be equipped with the spring, and the spring lower extreme is connected with sleeve pipe A, and the upper end is connected with support B bottom.

Further, the baffle inversion structure comprises: the device comprises a square plate A, a pulley A, a gear A, a belt A, a metal shaft B, a pulley B, a bevel gear A and a bevel gear B; the shafts at the two ends of the square plate A are rotatably arranged in the circular grooves, the folding support rods are arranged in the grooves on the outer side surfaces of the square plate A, the folding support rods can be supported in the grooves on the side surfaces of the rectangular box body when being unfolded, one quarter of sawteeth are arranged at the bottom of the square plate A, and the sawteeth are movably meshed with the gear A; the metal shaft A is rotatably arranged in the groove close to the upper position in the rectangular box body; the pulley A is fixedly arranged on the metal shaft A; the gear A is fixedly arranged on the metal shaft A; the metal shaft B is rotatably arranged in a groove at the lower part inside the rectangular box body; the bevel gear A is fixedly arranged on the metal shaft B; the pulley B is fixedly arranged on the metal shaft B; the bevel gear B is fixedly arranged on the screw A and is meshed with the bevel gear A; belt a wraps pulley a and pulley B.

Further, the baffle elevating structure includes: the device comprises a square plate B, a screw B, a gear B, a metal shaft C, a pulley C, a bevel gear C, a belt B, a pulley D, a bevel gear D and a gear C; the square plate B is slidably arranged in the square groove, two round holes are formed in the bottom end of the square plate B, threads are arranged in the round holes, and the two threads are opposite; the threads of the two screws B are opposite, the lower ends of the screws B are rotatably arranged on the gears B, and the upper ends of the screws B are connected with the threaded holes of the square plates B through threads; the gear B is rotatably arranged on the bottom plate in the square groove; the gear C is rotationally connected with the upper shaft of the bottom plate in the rectangular box body, and the gear C is meshed with the gear B; the bevel gear D is fixedly arranged on the gear C and is meshed with the bevel gear C; the metal shaft C is rotatably arranged in the square groove; the bevel gear C is fixedly arranged on the pulley C; the pulley C is fixedly arranged on the metal shaft C; the pulley D is fixedly arranged on the screw A; belt B wraps pulley C and pulley D.

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

1. the crank is rotated to drive the screw A to rotate, the screw A rotates to drive the square thread block and the elliptical sliding block to move back and forth, so that the U-shaped strip, the support A and the table plate are driven to move up and down, the table plate can move up and down at a constant speed according to the shaking speed, and the stability of the table top is improved.

2. When the desktop needs to be expanded, the square plate A is turned outwards, and then a support in the square plate A is unfolded to support the square plate A to complete expansion; when square board A need inwards overturn, use the crank to rotate screw rod A, screw rod A takes bevel gear B to rotate, bevel gear B takes bevel gear A to rotate, bevel gear A takes pulley B to rotate, pulley B takes pulley A to rotate through belt A, pulley A takes gear A to rotate, gear A takes square board A to rotate and accomplishes the upset, square board A has been realized rotating at the uniform velocity according to the speed of shaking, the stability has been improved, square board A's rotation about having realized, the extension desktop has been accomplished and the table board has been covered.

3. When square board B slides from top to bottom as required, use the crank to rotate screw A, screw A takes pulley D to rotate, pulley D takes pulley C to rotate through belt B, pulley C takes bevel gear C to rotate, bevel gear C takes bevel gear D, gear C rotates, gear C takes gear B to rotate, gear B takes screw B to rotate, screw B takes square board B to slide from top to bottom, take square board B to reciprocate through using two opposite screw rods B of screw thread, the indiscriminate of square board B when having avoided going up and down is shaken, stability is improved.

Drawings

Fig. 1-5 are schematic diagrams of the overall structure of the present invention.

Fig. 6 and 7 are schematic structural diagrams of a part of the desk body of the office desk.

Fig. 8 and 9 are schematic structural views of a part of the lifting structure of the desktop.

Fig. 10 is a schematic structural view of a part of the baffle inversion structure of the invention.

Fig. 11 is a schematic structural view of a part of the baffle lifting structure of the invention.

Reference numerals: 1-desk body; 2-a tabletop lifting structure; 3-baffle inward-turning structure; 4-baffle lifting structure; 101-a clamping hole; 102-a circular hole; 103-rotating wheels; 104-circular grooves; 105-a square groove; 106-a fixture block; 107-square plate; 108-a rectangular box body; 201-a table plate; 202-screw A; 203-square thread block; 204-elliptical slider; 205-scaffold a; 206-U-shaped strips; 207-support B; 208-cannula A; 209-sleeve B; 210-a crank; 301-square panel a; 302-Pulley A; 303-gear a; 304-belt A; 305-metal axis a; 306-metal axis B; 307-Pulley B; 308-bevel gear A; 309-bevel gear B; 401-square panel B; 402-screw B; 403-gear B; 404-metal axis C; 405-Pulley C; 406-bevel gear C; 407-belt B; 408-Pulley D; 409-bevel gear D; 410-gear C.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Embodiments a tileable expansion desk as shown in fig. 1-11, comprising: the desk comprises a desk body 1, a desktop lifting structure 2, a baffle inward-turning structure 3 and a baffle lifting structure 4; the office table body 1 is a table which can be spliced, and can be used as a single table for a single person and can be used as a conference table for a plurality of persons; the desktop lifting structure 2, the baffle inward-turning structure 3 and the baffle lifting structure 4 are arranged inside the office desk body 1; the desktop lifting structure 2 is positioned in the middle of the interior of the office desk body 1, and the desktop lifting structure 2 realizes the function of moving the desktop up and down; the baffle inward-turning structures 3 are positioned at the two ends of the desktop lifting structure 2, and the baffle inward-turning structures 3 realize the function of turning the baffles at the two sides; baffle elevation structure 4 is located the innermost of the desk body 1 inside, and baffle elevation structure 4 has realized the function that reciprocates the backplate.

In an alternative implementation of the embodiment of the present invention, the office table body 1 includes, in addition to the same components as in the previous embodiment: the device comprises a clamping hole 101, a round hole 102, a rotating wheel 103, a round groove 104, a square groove 105, a clamping block 106, a square plate 107 and a rectangular box 108; the rectangular box 108 is a shell of the whole office table; the clamping hole 101 is arranged on the right side plate of the rectangular box 108; the fixture block 106 is arranged on the left side plate of the rectangular box 108; the round holes 102 are arranged between two side plates of the rectangular box 108; the rotating wheel 103 is arranged at the bottom of the rectangular box 108; the circular groove 104 is arranged on the inner side surface of the top of the rectangular box 108; the square groove 105 is arranged in the rear plate of the rectangular box 108; the square plate 107 is fixedly arranged on the bottom plate in the rectangular box 108; when splicing is needed, the rectangular box 108 is pushed to the side of the other rectangular box 108, and the fixing is completed through the matching of the clamping hole 101 and the clamping block 106.

In an alternative implementation of the embodiment of the present invention, the table top lifting structure 2 includes, in addition to the same components as in the previous embodiment: the table comprises a table plate 201, a screw A202, a square thread block 203, an oval slider 204, a bracket A205, a U-shaped bar 206, a bracket B207, a sleeve A208, a sleeve B209 and a crank 210; the screw A202 is rotatably arranged in the round hole 102; the table board 201 is slidably mounted in the rectangular box 108; the threads inside the square thread block 203 are matched with the threads on the screw A202; the oval sliding block 204 is fixedly arranged at the shaft end part of the square thread block 203, and the oval sliding block 204 is arranged in the U-shaped strip 206 in a sliding manner; the support A205 is fixedly arranged at the bottom of the desk plate 201, a spring is arranged inside the support A205, the upper end of the spring is connected with the support A205, and the lower end of the spring is connected with the U-shaped strip 206; the upper rod of the U-shaped strip 206 is slidably arranged in a sleeve below the support A205, the lower rod of the U-shaped strip 206 is slidably arranged in a sleeve above the support B207, the lower end of the support B207 is slidably arranged in a sleeve of the sleeve A208, a spring is arranged in the support B207 and is a top spring, one end of the spring is connected with the support B207, and the other end of the spring is connected with the U-shaped strip 206; the sleeve B209 is fixedly arranged on a bottom plate in the rectangular box 108, a spring is arranged in the sleeve B209, the lower end of the spring is connected with the sleeve B209, and the upper end of the spring is connected with the bottom of the sleeve A208; the sleeve A208 is slidably arranged in the sleeve B209, a spring is arranged in the sleeve A208, the lower end of the spring is connected with the sleeve A208, and the upper end of the spring is connected with the bottom of the support B207; when the table top is needed to be used, the square groove 105 at one end of the crank 210 is sleeved on the square protruding block at one end of the screw A202, the crank 210 is rotated to drive the screw A202 to rotate, the screw A202 rotates to drive the square thread block 203 and the elliptical sliding block 204 to move back and forth, so that the U-shaped strip 206, the support A205 and the table top 201 are driven to move up and down, the table top 201 moves up and down at a constant speed according to the shaking speed, and the stability of the table top is improved.

In an alternative implementation of the embodiment of the present invention, the baffle inversion structure 3 includes, except for the same components as in the previous embodiment: a square plate A301, a pulley A302, a gear A303, a belt A304, a metal shaft A305, a metal shaft B306, a pulley B307, a bevel gear A308 and a bevel gear B309; the shafts at the two ends of the square plate A301 are rotatably arranged in the circular groove 104, the folding support rod is arranged in the groove on the outer side surface of the square plate A301, the folding support rod can be supported in the groove on the side surface of the rectangular box 108 when being unfolded, one quarter of saw teeth are arranged at the bottom of the square plate A301, and the saw teeth are movably meshed with the gear A303; the metal shaft A305 is rotatably arranged in a groove at the upper position inside the rectangular box 108; pulley a302 is fixedly mounted on metal shaft a 305; the gear A303 is fixedly arranged on the metal shaft A305; the metal shaft B306 is rotatably arranged in a groove at the lower part inside the rectangular box 108; bevel gear A308 is fixedly mounted on metal shaft B306; the pulley B307 is fixedly arranged on the metal shaft B306; a bevel gear B309 is fixedly arranged on the screw A202, and the bevel gear B309 is meshed with the bevel gear A308; belt a304 wraps pulley a302 and pulley B307; when the desktop needs to be expanded, the square plate A301 is rotated outwards, and then a support in the square plate A301 is unfolded to support the square plate A301 to complete expansion; when the square plate A301 needs to be turned inwards, the crank 210 is used for rotating the screw A202, the screw A202 drives the bevel gear B309 to rotate, the bevel gear B309 drives the bevel gear A308 to rotate, the bevel gear A308 drives the pulley B307 to rotate, the pulley B307 drives the pulley A302 to rotate through the belt A304, the pulley A302 drives the gear A303 to rotate, the gear A303 drives the square plate A301 to rotate to complete turning, the square plate A301 rotates at a constant speed according to the shaking speed, the stability is improved, the left-right rotation of the square plate A301 is realized, the desktop is expanded, and the desk plate 201 is covered.

In an alternative implementation of the embodiment of the present invention, the baffle elevating structure 4 includes, in addition to the same components as those of the previous embodiment: a square plate B401, a screw B402, a gear B403, a metal shaft C404, a pulley C405, a bevel gear C406, a belt B407, a pulley D408, a bevel gear D409 and a gear C410; the square plate B401 is slidably arranged in the square groove 105, two round holes are formed in the bottom end of the square plate B401, threads are arranged in the round holes, and the two threads are opposite; the threads of the two screws B402 are opposite, the lower ends of the screws B402 are rotatably arranged on the gear B403, and the upper ends of the screws B402 are in threaded connection with the threaded holes of the square plate B401; the gear B403 is rotatably arranged on the bottom plate inside the square groove 105; the gear C410 is rotationally connected with the upper shaft of the bottom plate in the rectangular box 108, and the gear C410 is meshed with the gear B403; a bevel gear D409 is fixedly arranged on the gear C410, and the bevel gear D409 is meshed with the bevel gear C406; the metal shaft C404 is rotatably arranged inside the square groove 105; bevel gear C406 is fixedly mounted on pulley C405; pulley C405 is fixedly mounted on metal shaft C404; the pulley D408 is fixedly arranged on the screw A202; belt B407 wraps pulley C405 and pulley D408; when the square plate B401 needs to slide up and down, the crank 210 is used for rotating the screw A202, the screw A202 drives the pulley D408 to rotate, the pulley D408 drives the pulley C405 to rotate through the belt B407, the pulley C405 drives the bevel gear C406 to rotate, the bevel gear C406 drives the bevel gear D409 and the gear C410 to rotate, the gear C410 drives the gear B403 to rotate, the gear B403 drives the screw B402 to rotate, the screw B402 drives the square plate B401 to slide up and down, the two screws B402 with opposite threads are used for driving the square plate B401 to move up and down, the random shaking when the square plate B401 goes up and down is avoided, and the stability is improved.

The working principle is as follows: when the desktop needs to be expanded, the square plate A301 is rotated outwards, then the support in the square plate A301 is unfolded to enable the lower end of the support to be connected with the hole in the side surface 108, and the square plate A301 is supported to complete expansion.

When meeting tables need to be spliced, a plurality of office tables are fixed by the clamp holes 101 and the clamp blocks 106, a groove at one end of one screw A202 is sleeved on a protrusion of the other screw A202, the screw A202 is rotated by using the crank 210, the screw A202 drives the square thread block 203, the bevel gear B309 and the pulley D408 to rotate, the square thread block 203 drives the oval slide block 204 to move forwards, the oval slide block 204 drives the U-shaped strip 206, the bracket A205 and the table plate 201 to move downwards to finish the descending of the table top, meanwhile, the bevel gear B309 drives the bevel gear A308 to rotate, the bevel gear A308 drives the pulley B307 to rotate, the pulley B307 drives the pulley A302 to rotate by the belt A304, the pulley A drives the gear A302 to rotate, the gear A303 drives the square plate A301 to rotate to cover the descending table top, meanwhile, the pulley D408 drives the pulley B407 to rotate by the belt B405, the pulley C drives the bevel gear C406 to rotate, the bevel gear C406 drives the bevel gear D409 and the gear C410 to rotate, the gear C410 drives the gear B403 to rotate, the gear B403 drives the screw B402 to rotate, the screw B402 drives the square plate B401 to move downwards to completely hide the square plate B401 inside the rectangular box 108, and therefore the spliced conference table is deformed synchronously.

When a single office table needs to be lowered, a crank 210 is used for rotating a screw A202, the screw A202 drives a square thread block 203, a bevel gear B309 and a pulley D408 to rotate, the square thread block 203 drives an elliptical slider 204 to move forwards, the elliptical slider 204 drives a U-shaped strip 206, a bracket A205 and a table 201 to move downwards to complete the lowering of the table top, meanwhile, the bevel gear B309 drives a bevel gear A308 to rotate, the bevel gear A308 drives a pulley B307 to rotate, the pulley B307 drives a pulley A302 to rotate through a belt A304, the pulley A302 drives a gear A303 to rotate, the gear A303 drives a square plate A301 to rotate to cover the lowered table top, the pulley D408 drives a pulley C405 to rotate through a belt B407, the pulley C405 drives a bevel gear C406 to rotate, the bevel gear C406 drives a bevel gear D409 and a gear C410 to rotate, the gear C410 drives a gear B403 to rotate, the screw B402 drives a screw B402 to rotate, the square plate B401 moves downwards to completely hide a rectangular plate B401 inside a box 108, after all the parts are finished, the top of the square plate A301 is provided with a lock, so that the desktop can be locked, and the safety is improved.

Claims

1. A tileable extended desk, comprising: the desk comprises a desk body (1), a desktop lifting structure (2), a baffle inward-turning structure (3) and a baffle lifting structure (4); the office table body (1) is a table which can be spliced, and can be used as a single table for a single person and a conference table for a plurality of persons; the desktop lifting structure (2), the inward turning blocking structure (3) and the baffle lifting structure (4) are arranged inside the office desk body (1); the desktop lifting structure (2) is positioned in the middle of the interior of the office desk body (1), and the desktop lifting structure (2) realizes the function of moving the desktop up and down; the baffle inward-turning structures (3) are positioned at two ends of the desktop lifting structure (2), and the baffle inward-turning structures (3) realize the function of turning the baffles at two sides; the baffle lifting structure (4) is positioned at the innermost end inside the desk body (1) of the office desk, and the baffle lifting structure (4) realizes the function of moving the rear baffle up and down;

the desk body (1) comprises: the device comprises a clamping hole (101), a round hole (102), a rotating wheel (103), a round groove (104), a square groove (105), a clamping block (106), a square plate (107) and a rectangular box body (108); the rectangular box body (108) is a shell of the whole office table; the clamping hole (101) is arranged on the right side plate of the rectangular box body (108); the fixture block (106) is arranged on the left side plate of the rectangular box body (108); the round holes (102) are arranged between two side plates of the rectangular box body (108); the rotating wheel (103) is arranged at the bottom of the rectangular box body (108); the round groove (104) is arranged on the inner side surface of the top of the rectangular box body (108); the square groove (105) is arranged in the rear plate of the rectangular box body (108); the square plate (107) is fixedly arranged on the bottom plate in the rectangular box body (108); when splicing is needed, the rectangular box body (108) is pushed to the side of the other rectangular box body (108), and fixing is completed through the matching of the clamping hole (101) and the clamping block (106);

the desktop lifting structure (2) comprises: the device comprises a table plate (201), a screw A (202), a square thread block (203), an oval sliding block (204), a bracket A (205), a U-shaped bar (206), a bracket B (207), a sleeve A (208), a sleeve B (209) and a crank (210); the screw A (202) is rotatably arranged in the round hole (102); the table plate (201) is slidably arranged in the rectangular box body (108); the threads inside the square thread block (203) are matched with the threads on the screw A (202); the elliptic slide block (204) is fixedly arranged at the shaft end part of the square thread block (203), and the elliptic slide block (204) is arranged in the U-shaped strip (206) in a sliding way; the support A (205) is fixedly arranged at the bottom of the desk plate (202), a spring is arranged inside the support A (205), the upper end of the spring is connected with the support A (205), and the lower end of the spring is connected with the U-shaped strip (206); the upper rod of the U-shaped strip (206) is slidably mounted in a sleeve below the support A (205), the lower rod of the U-shaped strip (206) is slidably mounted in a sleeve above the support B (207), the lower end of the support B (207) is slidably mounted in a sleeve of the sleeve A (208), a spring is arranged inside the support B (207), the spring is a top spring, one end of the spring is connected with the support B (207), and the other end of the spring is connected with the U-shaped strip (206); the sleeve B (209) is fixedly arranged on a bottom plate in the rectangular box body (108), a spring is arranged in the sleeve B (209), the lower end of the spring is connected with the sleeve B (209), and the upper end of the spring is connected with the bottom of the sleeve A (208); the sleeve A (208) is slidably mounted inside the sleeve B (209), a spring is arranged inside the sleeve A (208), the lower end of the spring is connected with the sleeve A (208), and the upper end of the spring is connected with the bottom of the support B (207); when the screw rod A (202) is required to be used, the square groove (105) at one end of the crank (210) is sleeved on the square convex block at one end of the screw rod A (202);

the baffle inversion structure (3) comprises: a square plate A (301), a pulley A (302), a gear A (303), a belt A (304), a metal shaft A (305), a metal shaft B (306), a pulley B (307), a bevel gear A (308) and a bevel gear B (309); the shafts at two ends of the square plate A (301) are rotatably arranged in the circular groove (104), the groove on the outer side surface of the square plate A (301) is internally provided with a folding supporting rod, the folding supporting rod can be supported in the groove on the side surface of the rectangular box body (108) when opened, one quarter of sawteeth are arranged at the bottom of the square plate A (301), and the sawteeth are movably meshed with the gear A (303); the metal shaft A (305) is rotatably arranged in a groove at the upper position inside the rectangular box body (108); the pulley A (302) is fixedly arranged on the metal shaft A (305); the gear A (303) is fixedly arranged on the metal shaft A (305); the metal shaft B (306) is rotatably arranged in a groove at the lower part inside the rectangular box body (108); the bevel gear A (308) is fixedly arranged on the metal shaft B (306); a pulley B (307) is fixedly arranged on the metal shaft B (306); a bevel gear B (309) is fixedly arranged on the screw A (202), and the bevel gear B (309) is meshed with the bevel gear A (308); the belt A (304) wraps the pulley A (302) and the pulley B (307);

the baffle lifting structure (4) comprises: a square plate B (401), a screw B (402), a gear B (403), a metal shaft C (404), a pulley C (405), a bevel gear C (406), a belt B (407), a pulley D (408), a bevel gear D (409) and a gear C (410); the square plate B (401) is slidably arranged in the square groove (105), two round holes are formed in the bottom end of the square plate B (401), threads are arranged in the round holes, and the two threads are opposite; the threads of the two screws B (402) are opposite, the lower ends of the screws B (402) are rotatably arranged on the gear B (403), and the upper ends of the screws B (402) are in threaded connection with the threaded holes of the square plate B (401); the gear B (403) is rotatably arranged on the bottom plate in the square groove (105); the gear C (410) is rotationally connected with an upper shaft of an inner bottom plate of the rectangular box body (108), and the gear C (410) is meshed with the gear B (403); the bevel gear D (409) is fixedly arranged on the gear C (410), and the bevel gear D (409) is meshed with the bevel gear C (406); the metal shaft C (404) is rotatably arranged in the square groove (105); a bevel gear C (406) is fixedly arranged on the pulley C (405); the pulley C (405) is fixedly arranged on the metal shaft C (404); the pulley D (408) is fixedly arranged on the screw A (202); belt B (407) wraps pulley C (405) and pulley D (408);

a crank (210) is used for rotating a screw A (202), the screw A (202) drives a square thread block (203), a bevel gear B (309) and a pulley D (408) to rotate, the square thread block (203) drives an elliptic slide block (204) to move forwards, the elliptic slide block (204) drives a U-shaped strip (206), a bracket A (205) and a table plate (201) to move downwards to finish the descending of a table top, meanwhile, the bevel gear B (309) drives a bevel gear A (308) to rotate, the bevel gear A (308) drives a pulley B (307) to rotate, the pulley B (307) drives a pulley A (302) to rotate through a belt A (304), the pulley A (302) drives a gear A (303) to rotate, the gear A (303) drives the square plate A (301) to rotate to cover the descended table top, meanwhile, a pulley D (408) drives a pulley C (405) to rotate through a belt B (407), the pulley C (405) drives a bevel gear C (406) to rotate, the bevel gear C (406) drives a bevel gear D (409), a gear C (410) rotates, the gear C (410) drives a gear B (403) to rotate, the gear B (403) drives a screw B (402) to rotate, the screw B (402) drives a square plate B (401) to move downwards to completely hide the square plate B (401) into the rectangular box body (108), and after all the square plates A (301) are completed, the top of each square plate A (301) is provided with a lock to lock the table top, so that the safety is improved.