CN114931276A

CN114931276A - Ready-package table frame connection structure

Info

Publication number: CN114931276A
Application number: CN202210881600.8A
Authority: CN
Inventors: 姚步堂; 杰瑞德·萨瑟兰; 张孟; 刘涛
Original assignee: Changzhou Kaidi Electrical Co Ltd
Current assignee: Changzhou Kaidi Electrical Co Ltd
Priority date: 2022-07-26
Filing date: 2022-07-26
Publication date: 2022-08-23
Anticipated expiration: 2042-07-26
Also published as: CN114931276B

Abstract

The invention relates to the technical field of intelligent lifting tables, in particular to a quick-mounting table frame connecting structure. A fast-assembly table frame connecting structure comprises a table top frame, a lifting upright post and a locking device, wherein the table top frame is telescopic in the length direction; the lifting upright post is vertically arranged on the desktop frame; the locking device is movably connected to the desktop frame and used for locking the lifting upright post to the desktop frame through the locking device and limiting the extension of the desktop frame in the length direction. The invention realizes the quick installation of the lifting upright column and synchronously realizes the locking and positioning of the telescopic desktop frame; the integration of the longitudinal beam and the desktop frame is realized, the packaging area is reduced, and the installation steps are simplified; the control box is quickly assembled, and the assembling time is saved.

Description

Ready-package table frame connection structure

Technical Field

The invention relates to the technical field of intelligent lifting tables, in particular to a quick-mounting table frame connecting structure.

Background

At present, the use of intelligence lift table is more and more common, and intelligence lift table generally comprises lift stand, control box, hand controller, desktop frame, desktop, through the electrical control to lift stand height to realize the co-altitude of desktop, in order to satisfy the demand of different height crowds. The desktop is generally supported by the desktop frame, and in order to adapt to desktops with different lengths, the desktop frame can be designed into a telescopic form, and generally comprises a left side frame, a right side frame and a middle frame, wherein the middle frame and the left side frame and the right side frame are nested and assembled and can slide relatively so as to adjust the length of the desktop. When the tables are shipped, the components of each part are usually disassembled so as to save the packaging and transportation volume, and the components need to be assembled by customers after receiving the goods. The middle frame and the left and right side frames are generally fixed relative to each other by a plurality of screws. This fastening is cumbersome to assemble for the end customer. The lifting upright posts also need to be fastened on the desktop frame, and the common installation method is also realized by a plurality of screws, which is also complicated. At present, a scheme for realizing the quick assembly of the lifting upright post and the desktop frame is also provided, and the scheme is generally realized by a structure which is used for pressing a handle and is similar to a cam, but an exposed pressing wrench is obtrusive and not attractive in appearance, but the problem of quick and simple assembly between the adjustable middle frame and the left and right side frames cannot be solved.

In addition, the components of each part of the table are not good in integrity on one hand, and on the other hand, the risk of missing parts is easy to exist, and meanwhile, the complex assembly also causes the use experience of customers to be poor.

The patent of publication No. CN215014432U discloses a lift table frame convenient to accomodate electric wire, has the desktop frame of scalable regulation length, and on the crossbeam of desktop frame was fixed through a plurality of fix with screws to the lift stand, also fixed through a plurality of fix with screws between the crossbeam of desktop frame to restriction length, assembly process is comparatively loaded down with trivial details.

Patent publication CN212590925U discloses a table frame convenient for assembly, in which a locking pin on the top shell of a lifting upright column is inserted into a locking hole on a side plate, and is limited in the locking hole by a locking element on a cross beam, and the assembly can be completed without other tools; the locking element pulls or extrudes the locking pin, so that the top shell and the side plates are connected and fixed, the side plates and the cross beam are connected and fixed, and the three parts are connected and fixed at the same time. But this scheme has only realized being connected of curb plate (being longeron) and casing, crossbeam three, still can not realize the quick convenient equipment of scalable desktop frame and fix.

Patent publication No. CN210988797U discloses a table frame of swift equipment, realized the pre-assembly with lift stand and desktop frame, only need with the lift stand from folding position rotation to the assembly position can, do not need loaded down with trivial details operation such as hole, screw up. This scheme has only realized the quick installation between lift stand and desktop frame, and left and right side frame and middle frame still need be fixed with a plurality of screws, do not realize the quick assembly of left and right side frame and middle frame.

Therefore, in the current market, the installation of the lifting upright post, the limit of the telescopic cross beam and the assembly of the iron frame longitudinal beam are all relatively complex and single, and the synchronous quick installation of the desktop frame, the lifting upright post and the connecting rod can not be realized simultaneously.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the defects in the prior art are overcome, a quick and convenient installation scheme is provided, quick assembly between the lifting upright post and the desktop frame is realized, and quick assembly and locking between the telescopic desktop frame are realized; and the product has higher integrity during shipment, and is beneficial to customer assembly.

The technical scheme adopted by the invention for solving the technical problems is as follows: a ready-package table frame connection structure, comprising: the desktop frame comprises side frames and a middle frame which are nested and assembled and can slide and stretch in the length direction; the lifting upright post is vertically arranged on the desktop frame; the locking device is movably connected to the desktop frame and comprises a bidirectional linkage mechanism and a tensioning mechanism; one end of the locking device locks the lifting upright post to the desktop frame through a bidirectional linkage mechanism, and the other end of the locking device synchronously fixes the side frame and the middle frame through the tensioning mechanism so that the side frame and the middle frame can not slide and stretch in the length direction.

The side frames have side rails and the middle frame has a center rail, and the locking device is fitted to the side rails.

Further, the bidirectional linkage mechanism comprises a mandrel, a first connecting rod, a second connecting rod, a third connecting rod and a pin; the side beam rod is provided with a first sliding groove;

the mandrel is connected with one end of the first connecting rod, the other end of the first connecting rod is hinged with one end of the second connecting rod, and the other end of the second connecting rod is hinged with the third connecting rod;

the end part of the mandrel is inserted into the first sliding groove arranged on the side beam rod;

the second connecting rod is rotatably connected with the side beam rod through the pin.

Further, the bidirectional linkage mechanism further comprises a wrench, wherein the wrench is fixedly connected to the second connecting rod, or the wrench and the second connecting rod are integrally manufactured.

Further, the tensioning mechanism comprises a sliding part and a bushing, wherein the sliding part is provided with a bent part; the elbow part is connected to one end of the bidirectional linkage mechanism;

the side beam rod is also provided with a first sliding chute;

the bushing is fixed in the side beam rod, a sliding gap is formed after the bushing and the side beam rod are assembled, and the middle beam rod is nested in the sliding gap;

the bush is provided with a guide groove with an open end, the sliding member is accommodated in the guide groove and can slide therein, and the bent portion protrudes to the outside of the side sill via a second sliding groove.

The spanner is rotated, the second connecting rod rotates, the mandrel is driven to slide back and forth in the first sliding groove through the first connecting rod, the bent part is driven to slide back and forth in the second sliding groove through the third connecting rod, and meanwhile the sliding part also slides back and forth in the bushing.

Furthermore, a buckle and a limiting flange edge are arranged on the bushing, and a buckle hole matched with the buckle is formed in the side beam rod; when the bush is inserted into the side beam rod, the flange edge is limited at the end part of the side beam rod, and the buckle is clamped into the buckle hole.

The fastener is aligned with the fastener hole and clamped in, so that the bushing is fixed on the side beam rod.

Furthermore, a tensioning section is arranged on the sliding part, a tensioning bulge is arranged on the bushing, the tensioning section is provided with a first guiding edge, and the tensioning bulge is provided with a second guiding edge.

Further, the lifting upright column comprises a shell, and a wedge-shaped boss and a mandrel groove are arranged on the shell; and the side beam rod is provided with a wedge-shaped groove matched with the wedge-shaped boss.

The wedge-shaped boss is arranged in the wedge-shaped groove, the mandrel is arranged in the mandrel groove, the middle beam rod is sleeved in a sliding gap formed by the bushing and the side beam rod, the wrench is rotated towards the locking direction, the first connecting rod drives the mandrel to push the shell to move towards the small end of the wedge-shaped groove, the wedge-shaped boss and the wedge-shaped groove are clamped mutually, and the lifting upright column is locked on the side frame. Meanwhile, the third connecting rod drives the sliding part to slide in the bushing through the bent part connected to the third connecting rod, the first guiding edge of the tensioning section of the sliding part gradually extrudes the second guiding edge of the tensioning convex of the bushing, the compression force is applied to compress the middle beam rod, the middle beam rod is locked in the side beam rods, namely the side frames and the middle frame are mutually locked and cannot relatively slide and stretch out and draw back.

The connecting rod mechanism is reasonably designed, certain self-locking force is provided when the wrench is locked, the mandrel and the sliding part cannot automatically and reversely return under the condition that the wrench is not pulled back, so that the lifting upright post cannot be loosened from the side frame, and the side frame and the middle frame are kept in a locking state.

The wrench is rotated in the opposite direction, so that the shell can move towards the large end of the wedge-shaped groove, the lifting upright column and the side frame are unlocked, and the side frame and the middle frame are unlocked simultaneously.

A plurality of tensioning sections and tensioning bulges can be arranged, so that the locking force of the side frame and the middle frame is uniformly distributed at each tensioning bulge, and the locking is more reliable.

Preferably, the bushing is made of plastic, such as nylon or polyoxymethylene.

Further, the desktop frame comprises a left set of the side frames, a right set of the side frames and a set of the middle frames.

Furthermore, the side frame also comprises two end beams and longitudinal beams, wherein the end beams are connected to one ends of the two side beam rods; the longitudinal beams are rotatably connected to the side beam rods or/and the end beams.

Further, the side frame further comprises a pin shaft; the side beam rod or/and the end beam is/are provided with a first pin hole, the longitudinal beam is provided with a second pin hole, and the longitudinal beam is rotatably connected to the side beam rod or/and the end beam through the pin shaft.

Furthermore, a limiting mechanism and a limiting hole are further arranged on the end beam; the limiting mechanism comprises an elastic part and a lock tongue, one end of the elastic part is installed at the lower end of the lock tongue, the other end of the elastic part is fixed on the end beam, and the upper end of the lock tongue penetrates through the limiting hole; the longitudinal beam is limited through a limiting mechanism.

Further, the spring bolt is the column, and the lower extreme is equipped with connector and the limit stop who is connected with the elastic component, and the upper end of spring bolt has point portion.

Further, the tip of the lock tongue is provided with a one-way guide inclined surface.

Furthermore, a lock hole corresponding to the lock tongue is formed in the longitudinal beam.

Pulling the longitudinal beam to open around the pin shaft, wherein the longitudinal beam presses the lock tongue into the end beam along the guide inclined plane; when the lock hole on the longitudinal beam is over against the lock tongue, the lock tongue is bounced into the lock hole on the longitudinal beam; through reasonable position design, the end beam can block the longitudinal beam at the moment, so that the longitudinal beam can not be opened any more. Meanwhile, the back of the one-way guide inclined plane of the lock tongue is a straight plane, so that the longitudinal beam is limited and cannot be folded. At the moment, pressure can be applied to press the lock tongue into the end beam, and then the longitudinal beam is pulled reversely, so that the longitudinal beam can be folded.

Furthermore, a control box for controlling the lifting upright post is arranged on the middle frame; the middle frame further comprises two middle beam plates, and the two middle beam plates are connected in parallel; the control box is installed on the middle frame through the middle beam plate.

Furthermore, the outer side wall of the control box is provided with an elastic sheet, and two sides of the elastic sheet are provided with lock catches; and the upper end of the middle beam plate is provided with a locking groove matched with the lock catch.

Align hasp and locked groove, press the control box to the centre sill board on, because the elastic action of shell fragment, the hasp bullet goes into the locked groove to install the control box on the middle frame fast. The elastic sheet is pressed back towards the inner side of the control box, and the control box can be taken down from the middle frame.

The lifting upright post and the control box are connected through a cable to transmit power and signals. The lifting upright post or the control box is also connected with a controller, after the power is switched on, the hand controller is operated, the lifting upright post extends or retracts, and the height of the desktop frame is adjusted.

The invention has the beneficial effects that:

1. the lifting upright posts are quickly installed, the side frames and the middle frame are synchronously locked and positioned, and the installation steps are simplified;

2. the integrated preassembly of the telescopic desktop frame is realized, the length of the cross beam can be adjusted independently by a client conveniently, and the installation steps are simplified;

3. the quick assembly of the longitudinal beam and the side frame is realized, and the integration degree can be further improved by pre-assembly; after the longitudinal beams are folded in a rotating mode, the packaging area can be reduced, and the packaging and transportation cost is reduced;

4. the limiting structure arranged on the desktop frame is beneficial to mounting the longitudinal beam at an accurate position, and the limiting structure enables the longitudinal beam and the side frame to be difficult to shift and more stable in connection;

5. the control box and the desktop frame are quickly assembled, the installation is convenient and fast, and the assembly time is saved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic view of the general structure of the preferred embodiment of the present invention.

Fig. 2 is an exploded view of fig. 1.

Fig. 3 is a schematic view of the assembly of the table top frame and the locking device of the present invention.

Fig. 4 is an assembly schematic diagram of the tensioning mechanism of the invention.

Fig. 5 is a cross-sectional view at a-a in fig. 4.

Fig. 6 is a schematic structural view of the tensioning mechanism in the invention.

Fig. 7 is a schematic view of the assembly of the lifting column and the table top frame of the present invention.

Fig. 8 is a schematic view of the assembly of the side member and the side frame in the present invention.

Fig. 9 is a schematic view of a limiting structure of the present invention.

Fig. 10 is an open/close schematic view of the side member of the present invention.

Fig. 11 is a schematic view of the installation of the intermediate frame and the control box in the present invention.

Fig. 12 is a schematic view of the structure of the control box of the present invention.

In the figure:

1. the table comprises a table top frame, 10 side frames, 11 middle frames, 100 side beam rods, 101 first sliding grooves, 102 second sliding grooves, 103 wedge-shaped grooves, 104 buckling holes, 105 side beam plates, 110 middle beam rods, 111 middle beam plates, 112 locking grooves and 120 first pin holes;

2. lifting upright columns, 20, a shell, 21, wedge-shaped bosses and 22, mandrel grooves;

3. the locking device comprises a locking device, 30, a bidirectional linkage mechanism, 300, a mandrel, 301, a first connecting rod, 302, a second connecting rod, 303, a third connecting rod, 304, a pin, 305, a wrench, 31, a tensioning mechanism, 310, a sliding part, 311, a bushing, 312, a bent head part, 313, a sliding gap, 314, a guide groove, 315, a buckle, 316, a flange edge, 317, a tensioning section, 318, a tensioning protrusion, 319, a first guide edge and 320, a second guide edge;

4. end beam, 40, limiting hole;

5. longitudinal beams, 50 second pin holes, 51 pin shafts, 52 snap springs and 53 lock holes;

6. the limiting mechanism comprises a limiting mechanism, 60 elastic pieces, 61 locking tongues, 610 connectors, 611 limiting stops, 612 tip parts, 613 guide inclined planes;

7. control box, 70, shell fragment, 71, hasp.

Detailed Description

The invention will now be described in further detail with reference to the drawings and preferred embodiments. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

As shown in fig. 1 and 2, a quick-assembly table frame connecting structure includes: a desktop frame 1, a lifting upright post 2 and a locking device 3. The desktop frame 1 comprises a left side frame 10, a right side frame 10 and a middle frame 11, the side frames 10 and the middle frame 11 are connected in a nesting mode, and the length of the desktop frame 1 can be adjusted by stretching or compressing the relative positions of the side frames and the middle frame to adapt to the installation of desktops of different lengths on the desktop frame 1. The lifting upright post 2 is vertically arranged on the desktop frame 1, and the height of the lifting upright post 2 can be electrically adjusted, so that the height of the desk can be adjusted. The locking device 3 is arranged on the inner side of the side frame 10 and is used for locking the lifting upright 2 to the desktop frame 1 and synchronously locking the side frame 10 and the middle frame 11 to limit the relative expansion and contraction of the two in the length direction.

The side frame 10 has two side members 100 arranged in parallel and connected as a frame by end members 4 and side members 105, and the locking device 3 is fitted inside the two parallel opposite side members 100. The middle frame 11 has two parallel middle beam rods 110 connected to form a frame by middle beam plates 111.

Preferably, the side sill 100 is a rectangular pipe, the middle sill 110 is a U-shaped member, the middle sill 110 can be inserted into the side sill 100, the two are connected in a nested manner, and the locking device 3 locks the two and then relatively fixes the two as an inextensible whole. Of course, the side sill 100 may be provided as a U-shaped member and the center sill 110 may be provided as a rectangular pipe member, and the arrangement of the locking device 3 may be adjusted accordingly, and the side sill 100 and the center sill 110 may be locked as one body.

As shown in fig. 3, 4, 5, and 6, the side rail 100 is provided with a first slide groove 101 and a second slide groove 102.

The locking device 3 comprises a bidirectional linkage mechanism 30, which is composed of a mandrel 300, a first connecting rod 301, a second connecting rod 302, a third connecting rod 303 and a wrench 305 which are connected in sequence. The mandrel 300 is connected with one end of a first connecting rod 301, the other end of the first connecting rod 301 is hinged with one end of a second connecting rod 302, the other end of the second connecting rod 302 is hinged with a third connecting rod 303, and a wrench 305 is fixedly connected with the second connecting rod 302. The end of the spindle 300 is inserted into the first slide groove 101 provided on the side sill 100. The middle portion of the second link 302 is pivotally connected to the side rail 100 by a pin 304. The wrench 305 is fixedly connected to the second link 302, and may be integrally formed with the second link 302.

The locking devices 3 are symmetrically arranged at the inner sides of two parallel opposite side beam rods 100, namely, a group of bidirectional linkage mechanisms 30 consisting of a first connecting rod 301, a second connecting rod 302 and a third connecting rod 303 are respectively arranged at the inner sides of the two opposite side beam rods 100, in the embodiment, the bidirectional linkage mechanisms 30 share a mandrel 300 and a wrench 305, two ends of the mandrel 300 are respectively inserted into the first sliding grooves 101 of the two side beam rods 100, and the wrench 305 is respectively connected to the second connecting rod 302 at each side.

The locking device 3 further comprises a tensioning mechanism 31, the tensioning mechanism 31 is composed of a sliding member 310 and a bushing 311, and the sliding member 310 has an elbow 312. The bushing 311 is fixed in the inner hole of the side sill 100, and after assembly, a U-shaped sliding gap 313 is formed in the side sill 100, and the middle sill 110 is inserted into the sliding gap 313 to form a nested assembly with the side sill 100.

The bush 311 is provided with a guide groove 314 with an open end, the slide member 310 is received in the guide groove 314 and is slidable therein, and the bent portion 312 protrudes to the outside of the side sill 100 through the second slide groove 102. The elbow portion 312 is connected to one end of the third link 303. When the wrench 305 is turned, the second link 302 follows the turning, the spindle 300 is driven by the first link 301 to slide back and forth in the first sliding slot 101, and the elbow part 312 is driven by the third link 303 to slide back and forth in the second sliding slot 102, and the sliding part 310 also slides back and forth in the bushing 311. Each side beam 100 is provided with a set of tensioning mechanism 31.

As shown in fig. 7, the lifting column 2 comprises a housing 20, a wedge-shaped boss 21 and a mandrel recess 22. A wedge boss 21 and a spindle groove 22 are provided at the housing 20. The side beam rod 100 is further provided with a wedge-shaped groove 103 matched with the wedge-shaped boss 21.

The bush 311 is further provided with a buckle 315, the side beam 100 is provided with a buckle hole 104 matched with the buckle 315, and the two are mutually clamped to fix the bush 311 on the side beam 100.

The bushing 311 also has a flange 316 at one end thereof, and when the bushing 311 is inserted into the side sill 100, the flange 316 serves as a stop at the end of the side sill 100.

The sliding member 310 is provided with a tensioning section 317, the bushing 311 is provided with a tensioning protrusion 318, the tensioning section 317 is provided with a first guiding edge 319, and the tensioning protrusion 318 is provided with a second guiding edge 320.

When the middle beam rod 110 is inserted into the sliding gap 313 formed by the bushing 311 and the side beam rod 100, the wrench 305 is rotated in the locking direction, the third connecting rod 303 drives the sliding member 310 to slide in the bushing 311 through the elbow part 312 connected thereto, the first guiding edge 319 of the tensioning section 317 of the sliding member 310 gradually presses the second guiding edge 320 of the tensioning protrusion 318, a pressing force is applied to compress the middle beam rod 110, and the middle beam rod 110 is locked in the side beam rod 100, i.e., the side frame 10 and the middle frame 11 are locked with each other and cannot be relatively stretched. The side frames 10 and the middle frame 11 can be loosened by rotating the wrench 305 in the reverse direction. Through reasonable design, a plurality of tensioning sections 317 and tensioning bulges 318 can be arranged, so that the locking force of the side frames 10 and the middle frame 11 is uniformly distributed at the tensioning bulges 318, and the locking is more reliable. The first leading edge 319 and the second leading edge 320 are transition chamfered edges or circular arc edges.

In this embodiment, each of the side beam rods 100 is provided with a set of tensioning mechanisms 31, and each set of tensioning mechanism 31 is provided with two symmetrical tensioning sections 317 and two symmetrical tensioning protrusions 318, which can be increased or decreased according to the structure of the product.

Preferably, the bushing 311 is made of plastic, such as nylon or polyoxymethylene.

As shown in fig. 8, 9, and 10, the side frame 10 further includes an end beam 4 and a longitudinal beam 5, the end beam 4 being connected to one end of two side beam members 100; the longitudinal beam 5 is provided at the junction of the side sill 100 and the end sill 4 and is rotatable about the junction. The connection between the side frame 10 and the end beam 4 is provided with a first pin hole 120, the longitudinal beam 5 is provided with a second pin hole 50, and the longitudinal beam 5 is rotatably connected to the connection between the side beam rod 100 and the end beam 4 through a pin 51. The pin shaft 51 is provided with a snap spring 52 to prevent the pin shaft 51 from falling off.

The end beam 4 is also provided with a limiting mechanism 6, and the longitudinal beam 5 is limited through the limiting mechanism 6. The end beam 4 is provided with a limiting hole 40, the limiting mechanism 6 comprises an elastic part 60 and a bolt 61, one end of the elastic part 60 is arranged at the lower end of the bolt 61, the other end of the elastic part 60 is fixed on the end beam 4, and the upper end of the bolt 61 penetrates through the limiting hole 40.

The latch tongue 61 is in a column shape, the lower end of the latch tongue 61 is provided with a connector 610 connected with the elastic element 60 and a limit stop 611, and the upper end of the latch tongue 61 is provided with a tip 612. The tip 612 of the latch tongue 61 has a one-way guide ramp 613. The longitudinal beam 5 is provided with a lock hole 53 corresponding to the bolt 61.

In the present embodiment, the side members 5 of each set of side frames 10 are formed of two left and right divided pieces. Pulling the longitudinal beam 5 to rotate and open around the pin shaft 51, and pressing the lock tongue 61 into the limiting hole 40 of the end beam 4 along the guide inclined surface 613 by the longitudinal beam 5; when the lock hole 53 on the longitudinal beam 5 is opposite to the bolt 61, the bolt 61 springs into the lock hole 53 on the longitudinal beam 5; by means of a suitable positioning, the end beam 4 will now block the longitudinal beam 5, so that the longitudinal beam 5 cannot be opened any further. Meanwhile, since the back of the one-way guide inclined surface 613 of the latch 61 is a straight surface, the longitudinal beam 5 is limited and cannot be folded. Pressure may be applied to press the latch tongue 61 into the end beam 4 and then the longitudinal beam 5 may be reversed to fold the longitudinal beam 5 to either side of the side beam bar 100 as shown in phantom in figure 10.

As shown in fig. 11 and 12, the middle frame 11 is further provided with a control box 7 for controlling the lifting column 2. The outer side wall of the control box 7 is provided with a spring sheet 70, two sides of the spring sheet 70 are provided with lock catches 71, and the upper end of the middle beam plate 111 is provided with a lock groove 112 matched with the lock catches 71. The control box 7 is press-fitted to the center sill 111 by aligning the lock catches 71 with the lock grooves 112, and the lock catches 71 are sprung into the lock grooves 112 by the elastic force of the spring pieces 70, thereby quickly mounting the control box 7 to the center frame 11. The control box 7 can be removed from the intermediate frame 11 by pressing the elastic piece 70 back to the inner side of the control box 7.

The lifting upright post 2 is connected with the control box 7 through a cable to transmit power and signals. The lifting upright post 2 or the control box 7 is also connected with a controller (not shown), after the power is switched on, the hand controller is operated, the lifting upright post 2 extends or retracts, and the height of the desktop frame 1 is adjusted.

While particular embodiments of the present invention have been described in the foregoing specification, various modifications and alterations to the previously described embodiments will become apparent to those skilled in the art from this description without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a ready-package table frame connection structure which characterized in that includes:

the desktop frame (1) comprises side frames (10) and a middle frame (11), wherein the side frames and the middle frame are nested and assembled, and can slide and stretch in the length direction;

the lifting upright post (2) is vertically arranged on the desktop frame (1);

the locking device (3) is connected to the desktop frame (1), and the locking device (3) comprises a bidirectional linkage mechanism (30) and a tensioning mechanism (31);

one end of the locking device (3) locks the lifting upright post (2) to the desktop frame (1) through the bidirectional linkage mechanism (30), and the other end synchronously fixes the side frame (10) and the middle frame (11) through the tensioning mechanism (31) so that the side frame and the middle frame can not slidably extend and retract in the length direction;

the side frames (10) have side frame rails (100), the middle frame (11) has a middle frame rail (110), and the locking device (3) is assembled on the side frame rails (100).

2. The quick-assembly table frame connecting structure of claim 1, wherein: the bidirectional linkage mechanism (30) comprises a mandrel (300), a first connecting rod (301), a second connecting rod (302), a third connecting rod (303) and a pin (304);

a first sliding groove (101) is formed in the side beam rod (100);

the mandrel (300) is connected with one end of the first connecting rod (301), the other end of the first connecting rod (301) is hinged with one end of the second connecting rod (302), and the other end of the second connecting rod (302) is hinged with the third connecting rod (303);

the end of the mandrel (300) is inserted into the first sliding groove (101) arranged on the side beam rod (100);

the second connecting rod (302) is rotatably connected with the side beam rod (100) through the pin (304).

3. The quick-assembly table frame connecting structure of claim 2, wherein: the bidirectional linkage mechanism (30) further comprises a wrench (305), wherein the wrench (305) is fixedly connected to the second connecting rod (302), or the wrench (305) and the second connecting rod (302) are integrally manufactured.

4. The quick-assembly table frame connecting structure of claim 1, wherein: the tensioning mechanism (31) comprises a sliding part (310) and a bushing (311), the sliding part (310) is provided with a bent part (312), and the bent part (312) is connected to one end of the bidirectional linkage mechanism (30);

the side beam rod (100) is also provided with a first sliding chute (101);

the bushing (311) is fixed in the side beam rod (100), the bushing (311) and the side beam rod (100) form a sliding gap (313) after being assembled, and the middle beam rod (110) is nested in the sliding gap (313);

the bush (311) is provided with a guide groove (314) with an open end, the sliding member (310) is accommodated in the guide groove (314) and can slide therein, and the bent portion (312) protrudes to the outside of the side sill (100) through the second sliding groove (102).

5. The quick-assembly table frame connecting structure of claim 4, wherein: a buckle (315) and a limiting flange edge (316) are arranged on the bushing (311), and a buckle hole (104) matched with the buckle (315) is arranged on the side beam rod (100);

when the bushing (311) is inserted into the side beam rod (100), the flange edge (316) is limited at the end part of the side beam rod (100), and the buckle (315) is clamped into the buckle hole (104).

6. The quick-assembly table frame connecting structure of claim 4, wherein: the sliding part is provided with a tensioning section (317), the bushing (311) is provided with a tensioning protrusion (318), the tensioning section (317) is provided with a first guiding edge (319), and the tensioning protrusion (318) is provided with a second guiding edge (320).

7. The quick-assembly table frame connecting structure of claim 4, wherein: the bushing (311) is made of plastic.

8. The quick-assembly table frame connecting structure of claim 1, wherein: the lifting upright post (2) comprises a shell (20), and a wedge-shaped boss (21) and a mandrel groove (22) are arranged on the shell (20); and a wedge-shaped groove (103) matched with the wedge-shaped boss (21) is formed in the side beam rod (100).

9. The quick-assembly table frame connecting structure of claim 1, wherein: the desktop frame (1) comprises a left set of the side frame (10) and a right set of the middle frame (11).

10. The quick-assembly table frame connecting structure of claim 1, wherein: the side frame (10) further comprises end beams (4) and longitudinal beams (5), the number of the side beam rods (100) is two, and the end beams (4) are connected to one ends of the two side beam rods (100); the longitudinal beam (5) is rotatably connected to the side beam rod (100) or/and the end beam (4).

11. A ready-to-mount table frame connection structure as claimed in claim 10, wherein: the side frame (10) further comprises a pin shaft (51); the side beam rod (100) or/and the end beam (4) is/are provided with a first pin hole (120), the longitudinal beam (5) is provided with a second pin hole (50), and the longitudinal beam (5) is rotatably connected to the side beam rod (100) or/and the end beam (4) through the pin shaft (51).

12. A ready-to-mount table frame connection structure as claimed in claim 10, wherein: the end beam (4) is also provided with a limiting mechanism (6) and a limiting hole (40); the limiting mechanism (6) comprises an elastic piece (60) and a lock tongue (61), one end of the elastic piece (60) is installed at the lower end of the lock tongue (61), the other end of the elastic piece (60) is fixed on the end beam (4), and the upper end of the lock tongue (61) penetrates through a limiting hole (40); the longitudinal beam (5) is limited through a limiting mechanism (6).

13. A ready-to-mount table frame connection as defined in claim 12, wherein: the bolt (61) is columnar, the lower end of the bolt is provided with a connector (610) connected with the elastic piece (60) and a limit stop (611), and the upper end of the bolt (61) is provided with a tip (612).

14. A ready-to-mount table frame connection as claimed in claim 13, wherein: the tip (612) of the latch tongue (61) has a one-way guide ramp (613).

15. A ready-to-mount table frame connection as defined in claim 14 wherein: and a lock hole (53) corresponding to the lock tongue (61) is arranged on the longitudinal beam (5).

16. The quick-assembly table frame connecting structure of claim 1, wherein: the middle frame (11) is provided with a control box (7) for controlling the lifting upright post (2); the middle frame (11) further comprises two middle beam plates (111), the number of the middle beam rods (110) is two, and the middle beam plates (111) connect the two middle beam rods (110) in parallel; the control box (7) is installed on the middle frame (11) through a middle beam plate (111).

17. A ready-to-mount table frame connection as defined in claim 16 wherein: the outer side wall of the control box (7) is provided with an elastic sheet (70), and two sides of the elastic sheet (70) are provided with lock catches (71); the upper end of the middle beam plate (111) is provided with a lock groove (112) matched with the lock catch (71).