CN110432652A - A kind of desktop and the folding table for being equipped with the desktop - Google Patents

Abstract

A kind of desktop, including plate body, plate body edge are bent downward, and the plate body edge bottom in four corners of plate body is equipped with inside horizontal-extending flange.The folding table is equipped with left table leg and right table leg at the back side of plate body, and the center at plate body back is equipped with center connection sheet, and left lever is equipped between center connection sheet and left table leg, right pull rod is equipped between center connection sheet and right table leg.The desktop is by the way that after flange is arranged in four corners at plate body edge, flange can not only provide supporting plane, stack neatly convenient for desktop, and can significantly improve the structural strength of desktop rotation angle position.The folding table not only folding convenient, but also structural strength height, furthermore, the folding table can also limit the opening of feet and folding by position limiting structure, it is ensured that fold and open can smoothly in place, and, feet can be reliably locked in desktop back after folding, and be very suitable to outdoor camping use.

Description

A desktop board and a folding table equipped with the desktop board

technical field

The invention relates to an outdoor table, in particular to a desktop board and a folding table equipped with the desktop board.

Background technique

Various desktop boards with different structures are disclosed in the prior art. In addition to the difference in appearance and shape, the back of each desktop board also has structural differences. In order to improve the structural strength of the table top, the existing table tops are generally formed with criss-cross reinforcement ribs on the back. Although the rib structure is simple and has a good effect on improving the overall strength of the table, this rib structure does not specifically strengthen the structure of the corner area of the table, and the corner area of the table is bumped during use. For the more frequent parts, if the structure of the corner area is not strengthened, the corners of the table are prone to damage. In addition, for the convenience of storage and transportation, many existing outdoor tables are folding tables. Usually, these folding tables include a table board and folding table legs installed on the left and right sides of the bottom of the table board. When folding, the table legs rotate To the bottom of the table top, when opened, the legs open and support the table top. Although this folding table has a simple structure, its structural strength is not enough, and it is generally only suitable for ordinary household use. If there are specific requirements for the overall strength of the folding table, it is necessary to further improve the structure of this folding table.

Contents of the invention

The first technical problem to be solved by the present invention is to provide a desktop board that can increase the strength of the corner structure and is easy to stack in view of the above-mentioned prior art.

The second technical problem to be solved by the present invention is to provide a folding table with high structural strength and convenient folding in view of the above-mentioned prior art status.

The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: the desktop board includes a board body, and the peripheral edges of the board body are bent downwards, and the feature is that the edges of the board body at the four corners of the board body The bottom is provided with a flange extending horizontally inward.

In order to effectively support the flanging, the flanging is connected to the back of the plate body through a support column.

Preferably, the flange extends symmetrically from the center of the corner to the edges of two adjacent boards, the width of the flange is 5-10 mm, and the length of the flange from the center of the corner to the edge of any side board is 20-50 mm.

In order to improve the overall structural strength of the desktop board, the back of the board is formed with straight ribs and U-shaped ribs. The straight ribs are distributed in whole or in part in a criss-cross pattern, and the U-shaped ribs are along the length direction of the board. The openings are arranged at intervals and the opening faces the edge of the board body. The two oppositely arranged outer ribs of the U-shaped rib are connected to the edge of the board body, and the inner ribs of the U-shaped rib are connected to the straight ribs arranged horizontally.

In order to further improve the structural strength of the desktop board, the U-shaped reinforcing ribs on both sides of the board body are aligned with each other in the horizontal direction, and the two U-shaped reinforcing ribs that are aligned in the lateral direction are connected by straight-line reinforcing ribs arranged transversely, and the straight-line reinforcing ribs are connected to each other. In the middle of the inner convex rib of the U-shaped rib.

Further preferably, the distance between the linear reinforcing ribs arranged at intervals in the longitudinal direction is 70-130 mm, the distance between the two outer convex ribs of the U-shaped reinforcing rib is 60-100 mm, and the distance between adjacent U-shaped reinforcing ribs It is 60-100mm.

In order to further improve the structural strength of the desktop board, diagonal support blocks are provided at the parts where the straight line reinforcement ribs are connected to the edge of the board body and where the U-shaped reinforcement ribs are connected to the edge of the board body.

In order to improve the structural strength of the edge of the desktop board, at least two circles of horizontally arranged steps are formed on the outer wall of the edge of the board body, and the vertical projection of the outer edge of the upper step and the vertical projection of the inner edge of the lower adjacent step The projections are coincident with each other.

Further preferably, the upper and lower distances between adjacent steps are the same.

In order to improve the structural strength of the central part of the table top without significantly increasing the weight of the product, the board is thick in the middle and thin around the sides, and the thickness of the board gradually becomes thinner from the middle to the surroundings, and the thickness of the board is flush with the upper surface.

The technical solution adopted by the present invention to solve the above-mentioned second technical problem is: the folding table is equipped with a left table leg and a right table leg on the back of the board body, and it is characterized in that: a center As for the connecting piece, a left tie rod is installed between the central connecting piece and the left table foot, and a right tie rod is installed between the central connecting piece and the right table foot.

The left table foot and the right table foot can have multiple structures. Preferably, the left table foot includes a left push rod and a left supporting foot connected to the left push rod, and the left push rod is installed on the back of the board body. The left side is parallel to the left edge of the plate body. The left supporting foot includes a left bottom bar and left supporting bars arranged on both sides of the left bottom bar. The two left supporting bars and the two left side push bars The right table leg includes a right push rod and a right supporting foot connected to the right push rod. The right push rod is installed on the right side of the back of the board body and is parallel to the right edge of the board body. The right supporting foot includes a right bottom rod and right supporting rods arranged on both sides of the right bottom rod, and the two right supporting rods are connected with the two ends of the right push rod.

In order to limit the folding and opening of the left table leg and the right table leg, a fixed connecting piece is installed on each of the four corners of the back of the board, and the two ends of the left push rod are rotatably connected to the corresponding fixed On the connecting piece, the two ends of the right push rod are rotatably connected to the corresponding fixed connecting piece, and a strip-shaped limiting hole is opened on the fixed connecting piece, and a The limit pin matched with the strip-shaped limit hole, when the folding table is folded, the limit pin is against one end of the strip limit hole, and when the folding table is opened, the limit pin and The other ends of the strip-shaped spacer holes are offset.

In order to avoid interference with the rotation of the left push rod and the right push rod, the four corners of the back of the board are formed with fixed connecting piece installation parts, and a lower fixing piece is installed on the fixed connecting piece installation part. The fixed connecting piece is installed on the lower fixing piece, and the part of the lower fixing piece that cooperates with the left push rod and the right push rod is formed with an arc-shaped concave surface.

In order to reliably clamp the folded left bottom bar and right bottom bar, a movable ring for clamping the left bottom bar or right bottom bar is installed on the back of the board, and the movable ring includes a base and a rotation setting The arm on the base is provided with a plectrum on the arm.

In order to prevent the tie rods from interfering with the corresponding bottom rods, mutual avoidance structures are provided at the intersections of the left tie rods and the left bottom rods or the intersections of the right tie rods and the right bottom rods.

Further preferably, the movable embracing ring is clamped on the left side of the plate body and is used to clamp the right bottom bar, and the intersection of the right tie bar and the left bottom bar forms a curved portion that bends toward the back of the plate body, so The left bottom bar straddles the curved portion, the curved portion constitutes the avoidance structure, and the curved portion avoids the reinforcing ribs on the back of the plate body.

In order to balance the pulling force generated by the pull rod on the central connecting piece, the central connecting piece is an integral molded part, and the left and right sides of the central connecting piece are provided with pull rod installation grooves, and the left and right tie rods are installed on the corresponding The rod is installed in the groove.

Further preferably, a through hole is opened in the middle of the central connecting piece, and the tie rod installation groove is located on the left and right sides of the through hole. After the through hole is set, the support reinforcement bar can be installed in the through hole to improve the structural strength of the middle part of the folding table, and a pipe can also be installed in the through hole, and the garbage bag is enclosed within the two ends of the pipe.

In order to position the central connecting piece and prevent it from sliding left and right during installation, a connecting piece installation part is provided in the center of the back of the board, and a plurality of vertical installation holes are opened on the connecting piece installation part. The hole of the installation hole is protruded downward with a limit edge, and the central connecting piece is provided with a connection hole corresponding to the vertical installation hole one by one, and the surrounding part of the connection hole is formed to provide a corresponding limit edge. snap ring.

As a preferred solution, the vertical installation holes are arranged in two rows, the vertical installation holes in the same row are connected by the first reinforcement ribs, and the corresponding vertical installation holes in different rows are connected by the second reinforcement ribs.

As another preferred solution, the vertical mounting holes are arranged in two rows, and peripheral reinforcing ribs are arranged around the outer periphery of the vertical mounting holes, and each vertical mounting hole is connected to the peripheral reinforcing rib through a third reinforcing rib. connect.

Compared with the prior art, the present invention has the advantage that: the tabletop board is provided with flanging horizontally extending inwards at the bottom of the edge at the four corners of the board body, and the flanging can not only provide a support plane, but also facilitate the neat stacking of the tabletop boards , and can improve the structural strength of the corner part, especially after the flange and the back of the board body are connected through the support column, the structural strength of the corner part of the desktop board can be further improved. In addition, the folding table is equipped with a central connecting piece in the center of the back of the board, and the central connecting piece is connected with the table legs through a tie rod, which is not only convenient to fold, but also has high structural strength. The opening and folding of the table legs are limited to ensure that the folding and opening can be smoothly in place, and the table legs can be reliably locked on the back of the tabletop after being folded. It can be seen that the folding table is very suitable for outdoor camping.

Description of drawings

FIG. 1 is a schematic diagram of the structure of the back of the table top of Embodiment 1 of the present invention;

Fig. 2 is the enlarged schematic diagram of part A in Fig. 1;

FIG. 3 is a schematic diagram of the front structure of the tabletop according to Embodiment 1 of the present invention;

Fig. 4 is the enlarged schematic diagram of part A in Fig. 3;

Fig. 5 is a structural schematic diagram of the folding table in the folded state according to Embodiment 1 of the present invention;

Figure 6 is an enlarged schematic view of part C in Figure 5;

7 is a schematic diagram of a partial structure of Embodiment 1 of the present invention;

Fig. 8 is a schematic structural view of the central connecting piece of Embodiment 1 of the present invention;

Fig. 9 is a schematic structural view of the foldable table in an open state according to Embodiment 1 of the present invention;

Fig. 10 is a schematic structural view of the folding table in the folded state according to Embodiment 2 of the present invention;

Fig. 11 is a schematic diagram of a partial structure of the desktop of the folding table according to the second embodiment of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Embodiment one:

As shown in Fig. 1 and Fig. 2, the desktop board of this embodiment is an injection molding board, which includes a square board body 1, the edges of the board body are bent downwards, and the bottom of the board body edge 11 at the four corners of the board body 1 There is a flanging 12 horizontally extending inward from the bottom of the edge. In this embodiment, the flange 12 extends symmetrically from the center of the corner to the two adjacent board edges 11, the width of the flange 12 is 5-10 mm, and the extension length of the flange 12 from the center of the corner to the edge 22 of any side board is It is 20-50mm. The optimum solution is that the width of the flange 12 is about 7 mm, and the extension length is about 38 mm. The corner of the board body 1 adopts a flanging structure, which can not only improve the structural strength of the corner of the desktop board, but also provide a support plane for stacking the desktop boards, so that the desktop boards can be stacked neatly. In addition, in order to improve the strength, the flange 12 is connected to the back of the plate body 1 through the support column 13 .

Taking the length direction of the plate body 1 as the longitudinal direction and the width direction as the transverse direction, the back of the plate body 1 is formed with linear reinforcing ribs 14 and U-shaped reinforcing ribs 15. The plate body 1 is arranged at intervals in the length direction and the opening faces the edge 11 of the plate body. The two oppositely arranged outer ribs of the U-shaped reinforcing rib 15 are connected to the edge 11 of the plate body. The ribs 14 are connected to each other. And, the U-shaped reinforcing ribs 15 on both sides of the plate body 1 are horizontally aligned with each other, and the two transversely aligned U-shaped reinforcing ribs 15 are connected by a horizontally arranged linear reinforcing rib 14, and the linear reinforcing ribs 14 are connected to the U-shaped reinforcing ribs. The middle position of the inner convex rib of rib 15. In this embodiment, the distance between the linear reinforcing ribs arranged at intervals in the longitudinal direction is 70-130 mm, the distance between the two outer convex ribs of the U-shaped reinforcing rib is 60-100 mm, and the distance between adjacent U-shaped reinforcing ribs The distance between them is 60-100mm. The optimal solution is: the distance between the linear ribs 14 arranged longitudinally at intervals is about 100 mm, the distance between the two outer convex ribs of the U-shaped ribs 15 and the distance between adjacent U-shaped ribs 15 are about 80 mm .

In order to further improve the structural strength of the board body 1, in this embodiment, the parts where the straight ribs 14 are connected to the board body edge 11 and the parts where the U-shaped ribs 15 are connected to the board body edge 11 are provided with oblique support blocks 16 . In addition, considering that the central area of the desktop board is the main load-bearing area, the board body of this embodiment is thick in the middle and thin around the structure, and the thickness of the board body 1 gradually becomes thinner from the middle to the surrounding areas, and the board body 1 flush with the upper surface.

As shown in Figures 3 and 4, the outer wall of the board edge 11 of this embodiment is formed with a stepped structure, specifically: three circles of horizontally arranged steps 17 are formed on the outer wall of the board edge 11, and two adjacent circles of steps 17 are formed. The upper and lower intervals of the steps are the same, and the vertical projection of the outer edge of the upper step coincides with the vertical projection of the inner edge of the lower adjacent step.

As shown in Fig. 5 to Fig. 9, the desktop board of the folding table adopts the above-mentioned desktop board, the back side of the board body 1 is equipped with a left table leg 21 and a right table leg 22, and the center of the back side of the board body 1 is equipped with a central connecting piece 3, A left tie rod 41 is installed between the central connecting piece 3 and the left table foot 21 , and a right tie rod 42 is installed between the central connecting piece 3 and the right table foot 22 .

Wherein, the concrete structure of left table foot 21 and right table foot 22 is as follows:

The left table leg 21 comprises a left side push rod 211 and a left supporting foot connected to the left push rod, the left side push rod 211 is installed on the left side of the back of the board body 1 and is parallel to the left edge of the board body, the left side The supporting legs include a left bottom bar 212 and left support bars 213 arranged on both sides of the left bottom bar. The two left support bars 213 are connected to the two ends of the left side push bar 211 . Correspondingly, the right table leg 22 includes a right push rod 221 and a right supporting foot connected to the right push rod, and the right push rod 221 is installed on the right side of the back of the board body 1 and is parallel to the right edge of the board body , the right supporting foot includes a right bottom bar 222 and a right supporting bar 223 arranged on both sides of the right bottom bar, and two right supporting bars 223 are connected with two ends of the right side push bar 221 .

The rotation structure of left table foot 21 and right table foot 22 is as follows:

Four corners on the back of the plate body 1 are molded with a fixed connection piece mounting portion 18, on which a lower fixing piece 6 is installed, and on each lower fixing piece 6, a fixed connection piece 5 is installed. The two ends of the left side push rod 211 are rotatably connected to the corresponding fixed connection piece 5, and the two ends of the right side push rod 221 are rotatably connected to the corresponding fixed connection piece 5, in order to facilitate the left side push rod 211 and the right side push rod 221 turns smoothly, and the position that the lower fixed piece 6 matches with the left side push rod 211 and the right side push rod 221 is formed with an arc-shaped concave surface 61.

A strip-shaped limiting hole 51 is opened on the fixed connecting piece 5 , and a limiting pin 23 matched with the strip-shaped limiting hole 51 is provided on the left push rod 211 and the right push rod 221 . In the folded state of the folding table, the stop pin 23 abuts against one end of the strip-shaped stop hole 51, see Fig. 4; Figure 5.

After the table legs are folded, the table legs need to be fixed. In this embodiment, two movable rings 7 are installed on the left side of the back of the board body 1. As shown in FIG. within 7. In addition, the movable embracing ring 7 of this embodiment includes a base 71 and an embracing arm 72 rotatably arranged on the base, and a paddle 73 is arranged on the embracing arm 72 . When the right table leg 22 needs to be opened, press the plectrum 73 downwards to open the movable ring 7, and the right bottom bar 222 can be taken out smoothly.

In order to prevent the table legs and the pull rods from interfering with each other, it is necessary to provide a mutual avoidance structure at the intersection of the left pull rod 41 and the left bottom rod 212 or the cross of the right pull rod 42 and the right bottom rod 222 . In this embodiment, the part where the right tie rod 42 intersects with the left bottom rod 212 is formed with a curved portion 421 that bends toward the back of the board, and the left bottom rod 212 straddles the curved portion 421. The curved portion 421 constitutes an escape structure, and the curved The part 421 and the reinforcing rib on the back of the plate body 1 avoid each other.

The central connecting piece 3 of this embodiment is one piece, and the left and right sides of the central connecting piece 3 are provided with tie rod installation grooves 31 , and the left tie rod 41 and the right tie rod 42 are respectively installed in the corresponding tie rod installation grooves 31 . In this way, the force can be dispersed, so that the tension generated by the pull rod on the central connecting piece 3 is balanced left and right. In addition, a through hole 32 is formed in the middle of the central connecting piece 3 , and the tie rod installation groove 31 is located on the left and right sides of the through hole 32 . In order to improve the structural strength of the middle part of the folding table, a supporting reinforcement bar can be installed in the through hole 32. In addition, the through hole 32 can also be arranged according to the pipe, and garbage bags can be placed on both ends of the pipe, so as to facilitate the storage of garbage.

The installation structure of the central connecting piece 3 is as follows: in this embodiment, the central part of the back of the plate body 1 is provided with a connecting piece installation part 19, and a plurality of vertical installation holes 191 are opened on the connection piece installation part 19, and the holes of the vertical installation holes 191 are along the There is a limiting edge 192 protruding downward, see Fig. 2; the connecting hole 33 corresponding to the vertical mounting hole 191 is opened on the central connecting piece 3, and the surrounding part of the connecting hole 33 is formed for corresponding limiting The collar 34 into which the edge 192 snaps, see FIG. 8 .

In this embodiment, referring to Fig. 2, the vertical mounting holes 191 are arranged in two rows, the vertical mounting holes 191 in the same row are connected by the first reinforcing rib 193, and the corresponding vertical mounting holes 191 in different rows are connected by the second reinforcing rib 193 Ribs 194 are connected.

The size of the desktop board in this embodiment is 1102×552×70 mm, of course, this is a preferred size, and the protection scope of the present invention is not limited to this size.

Embodiment two:

As shown in Figure 10 and Figure 11, in this embodiment, vertical mounting holes 191 are arranged on the connecting piece mounting part 19 and arranged in two rows, and peripheral reinforcing ribs 195 are provided around the outer circumference of the vertical mounting holes 191, each Each of the vertical mounting holes 191 is connected to the peripheral reinforcing rib 195 through a third reinforcing rib 196 . For the rest of the structure of this embodiment, reference may be made to Embodiment 1, and no further description is given here.

Claims (22)

1. A desktop board, comprising a board body (1), the peripheral edges of the board body are bent downwards, and it is characterized in that: the bottom of the board body edge (11) at the four corners of the board body (1) is provided with A flanging (12) extending horizontally inwards. 2. The desktop board according to claim 1, characterized in that: the flange (12) is connected to the back of the board body (1) through a support column (13). 3. The desktop board according to claim 1, characterized in that: the flange (12) extends symmetrically from the center of the corner to the two adjacent board edges (11), and the flange (12) has a width of 5-5. 10mm, the extension length of the flanging (12) from the center of the corner to any side plate body edge (22) is 20-50mm. 4. The desktop board according to claim 1, characterized in that: the back of the board body (1) is formed with straight ribs (14) and U-shaped ribs (15), and the straight ribs (14) Whole or part of the criss-cross distribution, the U-shaped reinforcing ribs (15) are arranged at intervals along the length direction of the board body (1) and the opening faces the edge of the board body (11), and the two oppositely arranged U-shaped reinforcing ribs (15) The outer ribs are connected to the edge (11) of the board body, and the inner ribs of the U-shaped ribs (15) are connected to the straight ribs (14) arranged transversely. 5. The desktop board according to claim 4, characterized in that: the U-shaped reinforcing ribs (15) on both sides of the board body (1) are horizontally aligned with each other, and the two transversely aligned U-shaped reinforcing ribs (15) The straight reinforcement ribs (14) arranged horizontally are connected, and the straight reinforcement ribs (14) are connected at the middle position of the inner convex ribs of the U-shaped reinforcement ribs (15). 6. The desktop board according to claim 4, characterized in that: the distance between the straight ribs arranged at intervals in the longitudinal direction is 70-130 mm, and the distance between the two outer convex ribs of the U-shaped rib is 60 mm. ~100mm, and the distance between adjacent U-shaped ribs is 60~100mm. 7. The desktop board according to claim 4, characterized in that: the part where the linear reinforcing rib (14) is connected to the edge of the board body (11) and the U-shaped reinforcing rib (15) and the edge of the board body (11) The connected parts are all provided with oblique support blocks (16). 8. The desktop board according to claim 1, characterized in that: at least two circles of horizontally arranged steps (17) are formed on the outer side wall of the board body edge (11), and the vertical height of the outer edge of the upper step The projection coincides with the vertical projection of the inner edge of the adjacent steps below. 9. The desktop board according to claim 8, characterized in that: the upper and lower distances between adjacent steps (17) are the same. 10. The desktop board according to any one of claims 1 to 9, characterized in that: the board body (1) has a structure that is thick in the middle and thin around, and the thickness of the board body (1) is from the middle to the periphery gradually become thinner, and the upper surface of the plate body (1) is flush. 11. A folding table equipped with the desktop board according to any one of claims 1 to 10, left table legs (21) and right table legs (22) are installed on the back side of the board body (1), It is characterized in that: a central connecting piece (3) is installed in the center of the back of the board body (1), and a left tie rod (41) is installed between the central connecting piece (3) and the left table foot (21), and the A right tie rod (42) is installed between the central connecting piece (3) and the right table foot (22). 12. The folding table according to claim 11, characterized in that: the left table foot (21) comprises a left push rod (211) and a left supporting foot connected to the left push rod, and the left push rod (211) is installed on the left side of the back of the board body (1) and is parallel to the left side edge of the board body, and the left side support foot includes a left bottom bar (212) and a left support bar ( 213), two described left support rods (213) are connected with the two ends of the left side push rod (211), and the described right table foot (22) comprises the right side push rod (221) and is connected on the right side push rod The right side support pin on the top, the right push rod (221) is installed on the right side of the back of the board body (1) and is parallel to the right side edge of the board body, and the right side support leg includes a right bottom rod (222) and a set For the right support rods (223) on both sides of the right bottom rod, two of the right support rods (223) are connected to the two ends of the right push rod (221). 13. The folding table according to claim 12, characterized in that: each of the four corners on the back of the plate body (1) is equipped with a fixed connecting piece (5), and the left push rod (211) The two ends are rotatably connected to the corresponding fixed connecting piece (5), and the two ends of the right push rod (221) are rotatably connected to the corresponding fixed connecting piece (5), and on the fixed connecting piece (5) A strip-shaped limiting hole (51) is provided, and a limiting pin ( 23), in the folded state of the folding table, the limit pin (23) is against one end of the strip limit hole (51), and in the open state of the folding table, the limit pin (23) and the strip limit hole The other end of bit hole (51) offsets. 14. The folding table according to claim 13, characterized in that: four corners of the back of the board body (1) are formed with fixed connecting piece installation parts (18), and on the fixed connecting piece installation part (18) The lower fixed piece (6) is installed, and the fixed connecting piece (5) is installed on the lower fixed piece (6), and the lower fixed piece (6) is connected with the left push rod (211) and the right push rod ( 221) The matching position is formed with an arc-shaped concave surface (61). 15. The folding table according to claim 12, characterized in that: a movable ring (7) for clamping the left bottom bar (212) or the right bottom bar (222) is installed on the back of the board body (1) , the movable embracing ring (7) includes a base (71) and an embracing arm (72) rotatably arranged on the base, and a plectrum (73) is arranged on the embracing arm (72). 16. The folding table according to claim 15, characterized in that: at the intersection of the left tie bar (41) and the left bottom bar (212) or at the intersection of the right tie bar (42) and the right bottom bar (222) There is an avoidance structure for mutual avoidance. 17. The folding table according to claim 16, characterized in that: the movable ring (7) is clamped on the left side of the board body (1) and is used to clamp the right bottom bar (222), so The part where the right tie rod (42) intersects with the left bottom rod (212) is formed with a curved portion (421) that bends toward the back of the plate body, and the left bottom rod (212) straddles the curved portion (421), The bending portion (421) constitutes the avoidance structure, and the bending portion (421) avoids the reinforcing ribs on the back of the board body (1) from each other. 18. The folding table according to claim 11, characterized in that: the central connecting piece (3) is an integral molded part, and the left and right sides of the central connecting piece (3) are provided with rod installation grooves (31) , the left tie rod (41) and the right tie rod (42) are installed in the corresponding tie rod installation groove (31). 19. The folding table according to claim 18, characterized in that: there is a through hole (32) through the middle of the central connecting piece (3), and the rod installation groove (31) is located in the through hole (32). ) on the left and right sides. 20. The folding table according to claim 18, characterized in that: a connecting piece installation part (19) is provided in the center of the back of the board body (1), and a plurality of vertical To the installation hole (191), the hole of the vertical installation hole (191) described in part is provided with a limit edge (192) along the downwards, and the center connecting piece (3) is provided with the vertical installation hole. (191) are one-to-one corresponding to the connection holes (33), and a protruding ring (34) for snapping in the corresponding limit edge (192) is formed around part of the connection holes (33). 21. The folding table according to claim 20, characterized in that: the vertical installation holes (191) are arranged in two rows, and the vertical installation holes (191) in the same row are connected by first reinforcing ribs (193) , the corresponding vertical mounting holes (191) of different rows are connected by the second reinforcing rib (194). 22. The folding table according to claim 20, characterized in that: the vertical mounting holes (191) are arranged in two rows, and peripheral reinforcing ribs (195) are provided around the outer circumference of the vertical mounting holes (191), Each vertical mounting hole (191) is connected to the peripheral reinforcing rib (195) through a third reinforcing rib (196).