Extensible table plate locking structure

Abstract

The utility model discloses a locking structure of an extension table board, and aims to overcome the defect that the extension table board is inconvenient to unlock. The locking device comprises a locking piece installed on a table frame, a locking pin which is arranged in a telescopic moving mode is installed on the locking piece, and the locking pin and a table board are installed in an inserted mode to achieve locking and positioning of the table board. A driving piece is installed on the locking piece and drives the locking pin to move in a telescopic mode to achieve locking and unlocking of the table board. According to the extension table plate locking structure, locking and unlocking operation on the table plate is convenient and fast, and it can be visually found that the table plate is in the locking or unlocking state.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of extension table, more specifically, it relates to a kind of extension table board locking structure. BACKGROUND

[0002] At present, the table board of common extension table has double board desktop and three board desktop, the desktop is unfolded when extension table is used, positioning is needed after unfolding in place, the existing positioning mode is through installing limiting block, cooperate crescent lock, crescent lock is installed on the back of desktop, left and right to move unfolded desktop, lock crescent lock after unfolding in place to realize the positioning of desktop. This structure needs to bend down to find crescent lock every time, inconvenient to operate, when forgetting whether the desktop is locked, it also needs to bend down to check. Like Chinese patent publication No.CN 103584475B, a kind of desktop extendable table is disclosed, the back of extension desktop is installed with two lock catch parts A on the extension side of supporting rod, the back of desktop of table body is installed with lock catch part B, lock catch part A and lock catch part B are fixed after buckling to lock and fix extension desktop on table body. Lock catch part A is arranged on the back of extension desktop, lock catch part B is arranged on the back of desktop of table body, cannot be directly observed, inconvenient to operate. SUMMARY

[0003] In order to overcome the above shortcomings, the utility model provides a kind of extension table board locking structure, and the locking and unlocking operation of table board is convenient, and the locking or unlocking state of table board can be directly found.

[0004] In order to solve the above technical problems, the utility model adopts the following technical scheme: a kind of extension table board locking structure, including the locking piece installed on the table frame, the locking pin of telescopic movement is installed on the locking piece, and the locking pin is inserted with the locking and positioning of table board;Driving element is installed on the locking piece, and the locking and unlocking of table board are realized by driving the telescopic movement of locking pin driven by driving element.

[0005] The locking piece is installed on the table frame, and the telescopic movement of locking pin is driven by triggering driving element, so that the locking and unlocking of table board by locking pin is realized. Before the movement of table board, the locking of table board is realized by triggering driving element to drive locking pin to retract, at this time, table board can be moved to adjust position, table board is moved in place, and locking pin is inserted with table board to realize the locking and positioning of table board by triggering driving element to drive locking pin to extend again. The locking piece is installed on the table frame, and the user can see by standing, and the locking or unlocking state of table board can be judged by checking the state of locking piece.

[0006] The extension table board locking structure of the present application can conveniently lock and unlock the table board, and the locking or unlocking state of the table board can be directly found.

[0007] As preferred, the locking member comprises a connecting seat, a driving button is movably sleeved on the connecting seat, the driving button is a driving member, and the locking pin is arranged on the driving button.

[0008] The driving button is pressed to insert the locking pin into the table board to lock the table board. The driving button is pulled out a distance to separate the locking pin from the table board to unlock. The locking and unlocking operations are convenient.

[0009] As preferred, a return spring is arranged between the driving button and the connecting seat, a limiting block is arranged on the driving button, V-shaped limiting grooves and V-shaped pushing grooves are arranged at two ends of the limiting block, a limiting tip and a pushing tip are arranged on the connecting seat; after the driving button is pressed to position, the pushing grooves are pushed on the pushing tips, the limiting block is deflected forward or reversely, and the limiting grooves are clamped on the limiting tips or separated from the limiting tips after the driving button is released.

[0010] In the locking state, the limiting grooves on the limiting block are clamped on the limiting tips; in the unlocking state, the limiting grooves on the limiting block are separated from the limiting tips. In the locking operation, the driving button is pressed, the pushing grooves are pushed on the pushing tips after the driving button is pressed to position, the limiting block is deflected forward to an inclined state, then the driving button is released, the driving button is returned to position under the action of the return spring, the limiting grooves are clamped on the limiting tips, and the locking pin is in the locking position. The driving button is pressed again to perform the unlocking operation, the pushing grooves are pushed on the pushing tips after the driving button is pressed to position, the limiting block is reversely deflected to position, then the driving button is released, the driving button is returned to position under the action of the return spring, the limiting grooves are separated from the limiting tips in the returning process, and the locking pin is in the unlocking position. The locking and unlocking operations can be realized by pressing, and the operations are convenient and reliable.

[0011] As preferred, one end of the connecting seat is connected with a positioning cover, the positioning cover is sleeved with the driving button, a positioning protrusion is arranged on the side wall of the driving button, and the positioning protrusion is arranged on the positioning cover.

[0012] The positioning cover plays a positioning role on the positioning protrusion on the side wall of the driving button, and prevents the driving button from being separated from the connecting seat.

[0013] In another scheme, the locking member comprises a mounting seat, the locking pin is connected with a pre-tightening spring, the mounting seat is rotatably connected with an unlocking disc, the unlocking disc is a driving member, a top block is arranged on the locking pin, a pushing surface is arranged on the unlocking disc and corresponds to the top block, the top block is arranged on the pushing surface, and the pushing surface pushes the top block to move along the circumference when the unlocking disc rotates.

[0014] In the initial state, the locking pin is inserted into the table board under the pre-tightening force of the pre-tightening spring. In the unlocking operation, the unlocking disc is rotated, the pushing surface pushes the top block to move along the circumference when the unlocking disc rotates, and the locking pin is retracted to be unlocked.

[0015] As preferred, the mounting base is provided with an anti-rotation groove, and the locking pin is provided with an anti-rotation block which is adapted to be installed in the anti-rotation groove.

[0016] The anti-rotation block on the locking pin is adapted to be connected with the anti-rotation groove, thereby realizing the circumferential locking of the locking pin, so that the locking pin can only move axially and cannot rotate, and the locking pin can be reliably pushed by the unlocking disc.

[0017] As preferred, the mounting base is provided with a rotating knob which is connected with the unlocking disc.

[0018] The rotating knob is operated to rotate, so that the unlocking disc is rotated, which is convenient and reliable.

[0019] As preferred, the unlocking device is installed on the table frame, the unlocking device is provided with an unlocking rotating shaft, the unlocking rope is connected between the unlocking rotating shaft and the unlocking disc, and the return torsion spring is installed between the unlocking disc and the mounting base.

[0020] The unlocking rotating shaft is matched with an unlocking key, the unlocking key is inserted into the unlocking rotating shaft and drives the unlocking rotating shaft to rotate, so that the unlocking rope is wound, and then the unlocking disc is pulled to rotate, thereby realizing the unlocking of the locking pin.

[0021] As preferred, the unlocking device is arranged between the two locking members, the unlocking rope is connected between the unlocking disc on the two locking members and the unlocking rotating shaft, and the single unlocking device realizes the unlocking of the two locking members.

[0022] The single unlocking device realizes the unlocking of the two locking members, so that the effect of one lock double control is achieved, and the locking or unlocking of the two table plates is simultaneously controlled, which is convenient to use.

[0023] As preferred, the table plate is connected with the locking seat corresponding to the locking member, the locking seat is provided with a lock hole, and the locking pin is inserted and installed in the lock hole.

[0024] The locking seat is connected on the table plate, the lock hole is arranged on the locking seat, and the locking pin is inserted and installed in the lock hole to realize the locking of the table plate.

[0025] Compared with the prior art, the beneficial effects of the utility model are as follows: (1) the table plate locking structure of the patent application is convenient to operate for locking and unlocking the table plate, and the locking or unlocking state of the table plate can be intuitively found; (2) the locking and unlocking operation is realized by pressing the driving button, which is convenient and reliable; (3) the single unlocking device realizes the unlocking of the two locking members, so that the effect of one lock double control is achieved, and the locking or unlocking of the two table plates is simultaneously controlled, which is convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is the use state diagram of the utility model.

[0027] Figure 2 is the locking member structure diagram of embodiment 1 of the utility model.

[0028] Figure 3 is the exploded view of the locking piece of the embodiment 1 of the utility model.

[0029] Figure 4 is the central section view of the locking piece of the embodiment 1 of the utility model.

[0030] Figure 5 is the position section view of the locking piece limiting block of the embodiment 1 of the utility model.

[0031] Figure 6 is the structure diagram of the locking piece of the embodiment 2 of the utility model.

[0032] Figure 7 is the exploded view of the locking piece of the embodiment 2 of the utility model.

[0033] Figure 8 is the use state diagram of the embodiment 3 of the utility model.

[0034] Figure 9 is the structure diagram of the embodiment 3 of the utility model.

[0035] Figure 10 is the connection diagram of the locking piece and the unlocking device of the embodiment 3 of the utility model.

[0036] Figure 11 is the exploded view of the locking piece of the embodiment 3 of the utility model.

[0037] In the drawing: 1, table frame, 2, locking piece, 3, locking pin, 4, connecting seat, 5, drive button, 6, flange, 7, return spring, 8, mounting hole, 9, limiting block, 10, limiting groove, 11, pushing groove, 12, limiting tip, 13, pushing tip, 14, positioning cover, 15, positioning protrusion, 16, sleeve ring, 17, clamping groove, 18, locking seat, 19, mounting seat, 20, pre-tightening spring, 21, unlocking disc, 22, top block, 23, rotating column, 24, pushing surface, 25, positioning protrusion, 26, return torsional spring, 27, anti-rotation groove, 28, anti-rotation block, 29, knob, 30, end cover, 31, unlocking device, 32, unlocking rotating shaft, 33, unlocking rope, 34, wire reel, 35, clamping groove, 36, wire outlet hole, 37, mounting cylinder, 38, unlocking key. DETAILED DESCRIPTION

[0038] The technical scheme of the utility model will be further described in detail below by specific embodiments and in combination with the drawings:

[0039] Embodiment 1: a spread table board locking structure (see Figures 1 to 5), including the locking piece 2 installed on the table frame 1, and several table legs installed on the table frame 1 to support the whole table frame 1. The locking piece 2 is exposed on the side of the table frame 1, which is convenient for intuitive viewing. The locking pin 3 movably arranged on the locking piece 2 is in a hemispherical structure at the end, which is convenient for insertion. The locking pin 3 is inserted with the table plate to achieve locking and positioning of the table plate; the driving piece is installed on the locking piece 2, and the driving piece drives the locking pin 3 to move to achieve locking and unlocking of the table plate.

[0040] The locking piece 2 includes a connecting seat 4, which is tightly connected with the table frame 1, and the driving button 5 movably sleeved and connected on the connecting seat 4. The driving button 5 serves as the driving piece, and the locking pin 3 is arranged on the driving button 5. The locking pin 3 and the driving button 5 are in an integral structure. The flange 6 is arranged on the outer end edge of the driving button 5, which can increase the pressing area and facilitate the pressing operation.

[0041] The return spring 7 is installed between the driving button 5 and the connecting seat 4, the T-shaped mounting hole 8 is arranged on the connecting seat 4, the locking pin 3 is inserted and connected with the mounting hole 8, the return spring 7 is sleeved on the locking pin 3, one end of the return spring 7 abuts on the transition surface of the inner wall of the mounting hole 8, and the other end of the return spring 7 abuts on the driving button 5. The limiting block 9 rotatably connected is arranged on the driving button 5, V-shaped limiting grooves 10 and V-shaped pushing grooves 11 are arranged at both ends of the limiting block 9 respectively, and limiting sharp ends 12 and pushing sharp ends 13 are arranged on the connecting seat 4; the limiting sharp ends 12 and the pushing sharp ends 13 are arranged axially and spaced apart, and the limiting sharp ends 12 and the pushing sharp ends 13 are left-right staggered. After the driving button 5 is pressed into place, the pushing groove 11 is pushed onto the pushing sharp end 13, the limiting block 9 is forwardly deflected or reversely deflected, and after the driving button 5 is released, the limiting groove 10 is clamped at the limiting sharp end 12 or the limiting groove 10 is separated from the limiting sharp end 12.

[0042] One end of the connecting seat 4 is connected with the positioning cover 14, the positioning cover 14 is in an annular structure, the positioning cover 14 is sleeved with the driving button 5, the positioning protrusion 15 is arranged on the side wall of the driving button 5 and abuts on the positioning cover 14. The sleeve ring 16 is arranged on the positioning cover 14, a plurality of L-shaped clamping grooves 17 are arranged on the sleeve ring 16 in a circumferential direction and spaced apart, clamping strips corresponding to the clamping grooves 17 are arranged on the outer wall of the connecting seat 4, the sleeve ring 16 is sleeved and connected with the connecting seat 4, and the clamping strips are clamped in the clamping grooves 17. The locking seat 18 corresponding to the locking piece 2 is connected and locked on the table plate, the locking hole is arranged on the locking seat 18, and the locking pin 3 is inserted into the locking hole.

[0043] When the locking state, the limiting slot 10 on the limiting block 9 is clamped at the limiting tip 12; when the unlocking state, the limiting slot 10 on the limiting block 9 is separated from the limiting tip 12. When the locking operation, press the drive button 5, the drive button 5 is pushed to the top of the top pushing tip 13, the limiting block 9 is deflected to the inclined state, then release the drive button 5, under the action of the return spring 7, the drive button 5 is returned to make the limiting slot 10 clamped at the limiting tip 12, at this time the locking pin 3 is in the locking position. Press the drive button 5 again to unlock, the drive button 5 is pushed to the top of the top pushing tip 13, the limiting block 9 is deflected back, then release the drive button 5, under the action of the return spring 7, the drive button 5 is returned, in the return process, the limiting slot 10 is misaligned with the limiting tip 12, the limiting slot 10 is separated from the limiting tip 12, at this time the locking pin 3 is in the unlocking position. Through the pressing mode, the locking and unlocking operation can be realized, which is convenient and reliable.

[0044] The locking member 2 is installed on the table frame 1, and the locking pin 3 is driven to move in and out by pressing the drive button 5, thereby realizing the locking and unlocking of the table plate. Before the table plate moves, press the drive button 5 to drive the locking pin 3 to retract, thereby unlocking the table plate, at this time the table plate can be moved to adjust the position, after the table plate is moved to the position, press the drive button 5 again to drive the locking pin 3 to extend, and the locking pin 3 is inserted with the table plate to realize the locking and positioning of the table plate. The locking member 2 is installed on the table frame 1, and the user can see it by standing, and the locking and unlocking state of the table plate can be judged by checking the state of the locking member 2. The extension table plate locking structure of the present application is convenient for locking and unlocking the table plate, and the locking and unlocking state of the table plate can be directly observed. The locking and unlocking operation is realized by pressing the drive button 5, which is convenient and reliable.

[0045] Embodiment 2: an extension table plate locking structure (see Figure 6 、 Figure 7 ), including a locking member 2 installed on the table frame 1, and a plurality of table legs are installed on the table frame 1 to support the entire table frame 1. The locking member 2 is exposed on the side of the table frame 1, which is convenient for direct observation. The locking pin 3 is installed on the locking member 2 and moves in and out, and the end of the locking pin 3 is in a hemispherical structure, which is convenient for insertion. The locking pin 3 is inserted with the table plate to realize the locking and positioning of the table plate; a driving member is installed on the locking member 2, which drives the locking pin 3 to move in and out to realize the locking and unlocking of the table plate.

[0046] The locking member 2 comprises a mounting base 19, a locking pin 3 connected with a pre-tightening spring 20, and a unlocking disc 21 rotatably connected to the mounting base 19. The unlocking disc 21 serves as a driving member and has a ring structure. The locking pin 3 is provided with a top block 22. The locking pin 3 is provided with a rotating column 23 at one end. The rotating column 23 has an outer diameter larger than that of the locking pin 3. The two top blocks 22 are circumferentially and evenly arranged on the outer wall of the rotating column 23. The rotating column 23 is provided with a recessed groove at the end portion. The pre-tightening spring 20 is mounted in the recessed groove. The rotating column 23 is movably sleeved with the unlocking disc 21. The unlocking disc 21 is provided with a pushing surface 24 corresponding to the top block 22 and arranged in a circumferential direction. The top block 22 abuts against the pushing surface 24. The pushing surface 24 is arranged to rotate with the unlocking disc 21 to push the top block 22 to move. A locking seat 18 corresponding to the locking member 2 is arranged on the table board. The locking seat 18 is provided with a locking hole. The locking pin 3 is inserted into the locking hole. The lower end of the pushing surface 24 is provided with a positioning protrusion 25. The positioning protrusion 25 realizes positioning of the top block 22 to prevent the top block 22 from sliding away from the pushing surface 24. A return torsion spring 26 is arranged between the unlocking disc 21 and the mounting base 19. The return torsion spring 26 realizes positioning of the unlocking disc 21 to facilitate return of the unlocking disc 21. In the initial state, the locking pin 3 is inserted into the table board under the pre-tightening force of the pre-tightening spring 20. When unlocking, the unlocking disc 21 is rotated. The pushing surface 24 rotates with the unlocking disc 21 to push the top block 22 to move, thereby realizing retraction of the locking pin 3.

[0047] The mounting base 19 is provided with an anti-rotation groove 27. The locking pin 3 is provided with an anti-rotation block 28 which is adapted to be mounted in the anti-rotation groove 27. The anti-rotation block 28 on the locking pin 3 is adapted to be connected with the anti-rotation groove 27, thereby realizing circumferential locking of the locking pin 3. The locking pin 3 can only move in the axial direction and cannot rotate, thereby ensuring that the locking pin 3 can be reliably pushed by the unlocking disc 21.

[0048] The mounting base 19 is rotatably connected with a knob 29. The knob 29 is connected with the unlocking disc 21. The mounting base 19 is fastened with an end cover 30. The knob 29 is rotatably installed on the end cover 30. The end cover 30 is provided with a rotating hole. The knob 29 is rotatably connected with the rotating hole. The end of the knob 29 is provided with a flange 6 which abuts against the side surface of the end cover 30 to realize positioning. The knob 29 is provided with a recess. The pre-tightening spring 20 abuts in the recess.

[0049] The locking member 2 is installed on the table frame 1, and the extension and retraction of the locking pin 3 is driven by rotating the knob 29, thereby achieving the locking and unlocking of the table board by the locking pin 3. Before the table board moves, the knob 29 is rotated to drive the locking pin 3 to retract, thereby achieving the unlocking of the table board. At this time, the table board can be moved to adjust the position. After the table board is moved to the position, the locking pin 3 is driven by the pre-tightening spring 20 to return to the extended position, and the locking pin 3 is inserted with the table board to achieve the locking and positioning of the table board. The locking member 2 is installed on the table frame 1, and a user standing can see it, and the locking and unlocking states of the table board can be determined by checking the state of the locking member 2. The extension table board locking structure of the present application is convenient to lock and unlock the table board, and the locking and unlocking states of the table board can be directly observed. The rotation of the unlocking disc 21 is achieved by rotating the knob 29, thereby achieving the unlocking operation, which is convenient and reliable.

[0050] Embodiment 3: An extension table board locking structure (see Figures 8 to 11 ), comprising a locking member 2 installed on a table frame 1, and a plurality of table legs installed on the table frame 1 to support the entire table frame 1. The locking member 2 is exposed on the side of the table frame 1, which is convenient for direct observation. The locking member 2 is provided with a locking pin 3 arranged in extension and retraction, and the end of the locking pin 3 is provided with a hemispherical structure for easy insertion. The locking pin 3 is inserted with the table board to achieve the locking and positioning of the table board. A driving member is installed on the locking member 2, and the driving member drives the locking pin 3 to move in extension and retraction to achieve the locking and unlocking of the table board.

[0051] The locking member 2 comprises a mounting seat 19, the locking pin 3 is connected with a pre-tightening spring 20, the mounting seat 19 is rotationally connected with an unlocking disc 21, the unlocking disc 21 serves as a driving member, the unlocking disc 21 has a ring structure, and the locking pin 3 is provided with a top block 22. One end of the locking pin 3 is provided with a rotating column 23, the outer diameter of the rotating column 23 is larger than that of the locking pin 3, the two top blocks 22 are circumferentially and uniformly arranged on the outer wall of the rotating column 23, the end of the rotating column 23 is provided with a recessed groove, one end of the pre-tightening spring 20 is installed in the recessed groove, the rotating column 23 is movably sleeved with the unlocking disc 21, the unlocking disc 21 is provided with a pushing surface 24 inclined in the circumferential direction corresponding to the top block 22, the top block 22 abuts against the pushing surface 24, and the pushing surface 24 pushes the top block 22 to move along with the rotation of the unlocking disc 21. The table board is connected with a locking seat 18 corresponding to the locking member 2, the locking seat 18 is provided with a locking hole, and the locking pin 3 is inserted into the locking hole. The lower end of the pushing surface 24 is provided with a positioning protrusion 25, the positioning protrusion 25 achieves the positioning of the top block 22, and prevents the top block 22 from sliding away from the pushing surface 24. A return torsion spring 26 is installed between the unlocking disc 21 and the mounting seat 19, the return torsion spring 26 achieves the positioning of the unlocking disc 21, and facilitates the return of the unlocking disc 21. In the initial state, the locking pin 3 is inserted into the table board under the pre-tightening force of the pre-tightening spring 20. When the unlocking operation is performed, the unlocking disc 21 is rotated, the pushing surface 24 pushes the top block 22 to move along with the rotation of the unlocking disc 21, and the locking pin 3 is retracted to achieve the unlocking.

[0052] The anti-rotation groove 27 is arranged on the mounting seat 19, the anti-rotation block 28 is arranged on the locking pin 3, and the anti-rotation block 28 is adapted to be mounted in the anti-rotation groove 27. The anti-rotation block 28 on the locking pin 3 is adapted to be connected with the anti-rotation groove 27, the circumferential locking of the locking pin 3 is realized, the locking pin 3 can only move axially and cannot rotate, and it is ensured that the locking pin 3 can be reliably pushed by the unlocking disc 21.

[0053] The knob 29 is connected on the mounting seat 19, the end cover 30 is tightly connected on the mounting seat 19, the knob 29 and the end cover 30 are in an integrated structure, the recess is arranged on the knob 29, and the pre-tightening spring 20 is abutted in the recess.

[0054] The unlocking device 31 is mounted on the table frame 1, the unlocking shaft 32 is arranged on the unlocking device 31, the unlocking rope 33 is connected between the unlocking shaft 32 and the unlocking disc 21, the wire disc 34 is mounted on the unlocking shaft 32, the unlocking rope 33 is connected with the wire disc 34, and the return torsion spring 26 is mounted between the unlocking disc 21 and the mounting seat 19. The clamping joint is arranged at the end of the unlocking rope, the clamping joint and the clamping groove 35 are clamped and connected, the clamping groove 35 is arranged on the wire disc 34 and the unlocking disc 21. The wire hole 36 is arranged on the mounting seat 19, the unlocking rope 33 passes through the wire hole 36, the inner end of the wire hole 36 is arranged in a circumferential offset manner with the clamping groove 35 on the unlocking disc 21, and it is ensured that the unlocking rope 33 can pull the unlocking disc 21 to rotate during the pulling process.

[0055] The mounting cylinder 37 is arranged on the periphery of the unlocking shaft 32, the unlocking shaft 32 is rotatably mounted in the mounting cylinder 37, the wire disc 34 is mounted at one end of the unlocking shaft 32, the other end of the unlocking shaft 32 is in a polygonal structure, the unlocking shaft 32 is matched with the unlocking key 38, and the unlocking key 38 is inserted into one end of the unlocking shaft 32 in a polygonal structure and is rotated to be unlocked.

[0056] The unlocking device 31 is arranged between the two locking pieces 2, the unlocking rope 33 is connected between the unlocking disc 21 and the unlocking shaft 32 on the two locking pieces 2, and the single unlocking device 31 can realize the unlocking of the two locking pieces 2.

[0057] The locking piece 2 is mounted on the table frame 1, the unlocking key 38 is inserted into the unlocking shaft 32 and drives the unlocking shaft 32 to rotate, the unlocking rope 33 is wound, the unlocking disc 21 is pulled to rotate, and the locking of the locking pin 3 is realized.

[0058] After the unlocking is completed, the table plate can be moved and adjusted, the locking pin 3 is driven to return and extend by the pre-tightening spring 20 after the table plate is moved to the position, the locking pin 3 is inserted with the table plate to realize the locking and positioning of the table plate. The locking piece 2 is mounted on the table frame 1, a user can see it when standing, the locking and unlocking states of the table plate are determined by checking the state of the locking piece 2. The extension table plate locking structure of the patent application is convenient for locking and unlocking the table plate, and the locking and unlocking states of the table plate can be intuitively found.

[0059] In this embodiment, the knob 29 is rotatably connected to the mounting seat 19, and the knob 29 is connected to the unlocking disc 21. The end cover 30 is fixedly connected to the mounting seat 19, and the knob 29 is rotatably mounted on the end cover 30. The end cover 30 is provided with a rotating hole, and the knob 29 is rotatably connected to the rotating hole. The knob 29 is provided with a flange 6 at an end portion, and the flange 6 is abutted on a side surface of the end cover 30 to achieve positioning. The knob 29 is provided with a recess, and the pre-tightening spring 20 is abutted in the recess. The locking piece 2 is mounted on the table frame 1, and the extension and retraction of the locking pin 3 is driven by rotating the knob 29, so as to achieve the locking and unlocking of the table board by the locking pin 3. Before the table board is moved, the knob 29 is rotated to drive the locking pin 3 to retract, so as to achieve the unlocking of the table board. The unlocking key 38 can also be inserted into the unlocking rotating shaft 32 to drive the unlocking rotating shaft 32 to rotate, so as to wind the unlocking rope 33, and then pull the unlocking disc 21 to rotate, so as to achieve the unlocking of the locking pin 3. The other structures are the same as those in the embodiment 3.

[0060] The above-described embodiments are only the preferred schemes of the present application, and do not limit the present application in any form. Other variants and modifications can be made without departing from the technical schemes recited in the claims.

Claims

1. An extended tabletop locking structure, characterized in that, The locking piece is installed on the table frame, the locking pin is movably installed on the locking piece, and the locking pin is inserted into the table plate to lock and position the table plate.

2. The locking structure of a table board according to claim 1, wherein The locking piece includes a connecting seat, a driving button movably sleeved on the connecting seat, and the driving button as the driving member, and the locking pin is arranged on the driving button.

3. The locking structure of claim 2, wherein the locking structure is characterized by: A return spring is installed between the driving button and the connecting seat, a rotationally arranged limiting block is connected to the driving button, V-shaped limiting grooves and V-shaped pushing grooves are arranged at both ends of the limiting block, limiting sharp ends and pushing sharp ends are arranged on the connecting seat, the pushing grooves are pushed onto the pushing sharp ends after the driving button is pressed into position, the limiting block is positively deflected or reversely deflected, and the limiting grooves are clamped at the limiting sharp ends or separated from the limiting sharp ends after the driving button is released.

4. The table board locking structure according to claim 2, wherein One end of the connecting seat is connected to a positioning cover, the positioning cover is sleeved with the driving button, a positioning protrusion is arranged on the side wall of the driving button, and the positioning protrusion is arranged on the positioning cover.

5. The table board locking structure according to claim 1, wherein The locking piece includes a mounting seat, the locking pin is connected to a pre-tightening spring, the mounting seat is rotationally connected to an unlocking disc, the unlocking disc as the driving member, a top block is arranged on the locking pin, a pushing surface is arranged on the unlocking disc and the top block in correspondence with the top block, the top block is abutted on the pushing surface, and the pushing surface pushes the top block to move along with the rotation of the unlocking disc.

6. The locking structure of a table board according to claim 5, wherein A rotation-preventing groove is arranged on the mounting seat, and a rotation-preventing block is arranged on the locking pin and is adapted to be installed in the rotation-preventing groove.

7. The table board locking structure according to claim 5, wherein A knob is rotationally connected to the mounting seat, and the knob is connected to the unlocking disc.

8. The locking structure of claim 5, wherein the locking structure is characterized by: The unlocking device is installed on the table frame, the unlocking device is provided with an unlocking shaft, the unlocking shaft and the unlocking disc are connected by an unlocking rope, and a return torsion spring is installed between the unlocking disc and the mounting seat.

9. The table board locking structure according to claim 8, wherein The unlocking device is arranged between the two locking pieces, the unlocking rope is connected between the unlocking disc and the unlocking shaft of the two locking pieces, and a single unlocking device can unlock the two locking pieces.

10. The extension table locking structure according to any one of claims 1 to 9, wherein The table plate is connected to a corresponding locking seat of the locking piece, the locking seat is provided with a locking hole, and the locking pin is inserted into the locking hole.

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