Foldable supporting frame and foldable table

Abstract

The utility model relates to a foldable supporting frame and a foldable table. The foldable supporting frame comprises a supporting rod and two foldable supporting units arranged at the two ends of the supporting rod respectively. Each foldable supporting unit comprises a connecting base fixedly connected with the corresponding end of the supporting rod, and two lower supporting rods which are rotationally connected to the lower end of the connecting base and can be rotationally folded in the direction close to the supporting rod or rotationally unfolded in the direction away from the supporting rod relative to the connecting base. The two upper supporting rods are rotationally connected to the upper end of the connecting base and can be rotationally folded in the direction close to the supporting rods or rotationally unfolded in the direction away from the supporting rods relative to the connecting base; the locking mechanism is used for locking the two lower supporting rods and the two upper supporting rods after the two lower supporting rods and the two upper supporting rods are unfolded; the foldable table comprises a table plate, two bottom beams and the foldable supporting frame. The folding chair has the advantages of simple structure, easiness in folding, small volume after folding, stability in supporting after unfolding and the like.

Description

Technical Field

[0001] The utility model relates to the field of daily necessities, in particular to a foldable support frame and a foldable table. Background Art

[0002] Folding tables are commonly used equipment in outdoor activities. They can be unfolded when in use and folded when not in use without taking up too much space. They are very popular among consumers. Generally, a folding table consists of a desktop and a support frame. For easy carrying, both the desktop and the support frame can be folded and stored. At present, there are many types of folding and storage structure designs for support frames on the market, but for consumers, especially those who pursue new things, it is also very necessary to design a new foldable support frame and foldable table. Utility Model Content

[0003] The utility model aims to provide a new foldable support frame and a foldable table which are simple in structure, easy to fold, small in size after folding, and stable in support after unfolding.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] The foldable support frame of claim 1, wherein the two foldable support units are respectively arranged at two ends of the support rod; the two foldable support units each include a connecting seat fixedly connected to the corresponding end portions of the support rod, two lower support rods rotatably connected to the lower end of the connecting seat and can be rotated relative to the connecting seat in a direction close to the support rod or rotated to unfold in a direction away from the support rod, two upper support rods rotatably connected to the upper end of the connecting seat and can be rotated relative to the connecting seat in a direction close to the support rod or rotated to unfold in a direction away from the support rod, and a locking mechanism for locking the two lower support rods and the two upper support rods after they are unfolded; in each foldable support unit, the two lower support rods are located at both sides of the lower end of the corresponding end portion of the support rod in an outward-facing "eight-character" shape after unfolding, and the two upper support rods are located at both sides of the upper end of the corresponding end portion of the support rod in an inward-facing "eight-character" shape after unfolding, and the two lower support rods and the two upper support rods are close to the corresponding ends of the support rod after folding.

[0006] Furthermore, the upper ends of the two lower support rods are each provided with a first rotating connection head, and the lower ends of the two upper support rods are each provided with a second rotating connection head, the two lower support rods are respectively rotatably connected to the lower end of the connecting seat through the first rotating connection heads thereon, and the two upper support rods are respectively rotatably connected to the upper end of the connecting seat through the second rotating connection heads thereon, and the first rotating connection heads of the two lower support rods are connected together by mutual tooth meshing, the second rotating connection heads of the two upper support rods are connected together by mutual tooth meshing, and the first rotating connection heads of the two lower support rods are also respectively connected together by tooth meshing with the second rotating connection heads of the two upper support rods, so that the two lower support rods and the two upper support rods can be synchronously rotated and folded or synchronously rotated and unfolded.

[0007] Furthermore, the lower end of the connecting seat is symmetrically provided with two first U-shaped grooves that extend obliquely from top to bottom toward the front and rear outer sides of the support rod, and the upper end of the connecting seat is symmetrically provided with two second U-shaped grooves that extend obliquely from bottom to top toward the front and rear outer sides of the support rod, and the two first U-shaped grooves and the two second U-shaped grooves are arranged diagonally in a cross shape, the first rotating connecting heads of the two lower support rods extend into the corresponding first U-shaped grooves and are rotatably connected thereto via the first pin shaft, and the second rotating connecting heads of the two upper support rods extend into the corresponding second U-shaped grooves and are rotatably connected thereto via the second pin shaft, and the open ends of the two first U-shaped grooves and the two second U-shaped grooves are arranged close to the support rod, and the closed ends of the two first U-shaped grooves and the second U-shaped grooves are arranged away from the support rod, and the two lower support rods are blocked by the closed ends of the corresponding first U-shaped grooves after being unfolded, and the two upper support rods are blocked by the closed ends of the corresponding second U-shaped grooves after being unfolded.

[0008] Furthermore, the interior of the connecting seat is provided with a hollow cavity connected to the inner sides of the two first U-shaped grooves and the two second U-shaped grooves, and the locking mechanism includes a locking block and a locking block spring. The locking block is movably arranged in the hollow cavity, and four locking parts are formed around the locking block. The first rotating connecting head of the two lower support rods and the second rotating connecting heads of the two upper support rods are respectively provided with a locking groove. After the two lower support rods and the two upper support rods are unfolded, the four locking parts are snapped into the corresponding locking grooves so that the two lower support rods and the two upper support rods are locked in the unfolded position, and the locking block spring directly or indirectly acts on the locking block so that the four locking parts maintain a tendency to snap into the corresponding locking grooves.

[0009] Furthermore, the locking mechanism also includes an unlocking button, which includes a rod portion and a cap portion which are arranged as an integral whole, the rod portion is inserted into the hollow cavity and is fixedly connected to the locking block, the cap portion is exposed to the outside of the hollow cavity on a side away from the support rod for a pressing operation when unlocking, and a through hole is provided on the cavity wall of the hollow cavity on a side away from the support rod for the rod portion to penetrate into the hollow cavity, the locking block spring is sleeved on the rod portion, and one end of the locking block spring is abutted against the cap portion, and the other end is abutted against the positioning step portion in the through hole.

[0010] Furthermore, in each foldable support unit, the lengths of the two lower support rods and the two upper support rods are both less than half the length of the support rod, so that the two foldable support units can be symmetrically folded at both ends of the support rod.

[0011] Furthermore, whether the two foldable support units are in the unfolded state or in the folded state, the two lower support rods and the two upper support rods in one foldable support unit are aligned one by one with the two lower support rods and the two upper support rods in the other foldable support unit.

[0012] Furthermore, a connecting sleeve is provided on one side of the connecting seat facing the supporting rod, and the end of the supporting rod is inserted into the connecting sleeve and fixedly connected thereto by screws.

[0013] A foldable table comprises a table top, a bottom beam and a support frame, wherein the table top comprises a plurality of table top units arranged in sequence along the left-right direction, and two adjacent table top units are rotatably connected along the up-down direction, the bottom beam has two, and the two bottom beams are detachably arranged at intervals at the bottom of the table top along the front-back direction, and each bottom beam is composed of two section rods rotatably connected along the horizontal direction, and the support frame is a foldable support frame as described above, wherein the lower ends of the two lower support rods are provided with foot pads for contacting the ground, and the upper ends of the two upper support rods are detachably clamped on the corresponding ends of the two bottom beams.

[0014] Furthermore, a card platform extending in the front-to-back direction is protruded from the center of the bottom surface of the leftmost and rightmost table top units, and a first card member opening upward is provided at the left and right ends of the two bottom beams, and the first card member can be detachably clamped on the end of the corresponding card platform; the upper ends of the two upper support rods are provided with a second card member opening upward, and the second card member can be detachably clamped on the corresponding end of the two bottom beams and fixedly connected thereto by screws.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] Firstly, the foldable support frame of the utility model is composed of only one support rod and two foldable support units respectively arranged at both ends of the support rod, and the foldable support unit is also composed of only a connecting seat fixedly connected to the corresponding end of the support rod, two lower support rods rotatably connected to the lower end of the connecting seat, two upper support rods rotatably connected to the upper end of the connecting seat, and a locking mechanism for locking the two lower support rods and the two upper support rods after they are unfolded, so the structural design is relatively simple.

[0017] Secondly, when folding the foldable support frame of the utility model, it is only necessary to loosen the locking mechanism in the two foldable support units, and then synchronously rotate the two lower support rods and the two upper support rods in the two foldable support units in the direction close to the support rod to fold them. The entire folding process has few steps and is very easy to operate. Moreover, after the foldable support frame is folded, the two lower support rods and the two upper support rods in the two foldable support units are close to the support rod, so the folded volume is small, less space is occupied, and it is easy to store and place.

[0018] Furthermore, after the foldable support frame in the utility model is unfolded, the two lower support rods are located on both sides of the lower end of the support rod in an outward-facing "X" shape, and the two upper support rods are located on both sides of the upper end of the support rod in an inward-facing "X" shape, thereby forming two groups of roughly X-shaped support structures at both ends of the support rod. Therefore, the support is stable after unfolding and has high reliability.

[0019] Finally, in the folding table of the present invention, the table top, the bottom beam and the foldable support frame can be disassembled from each other, and after being disassembled, the three can be folded and stored separately, thereby greatly reducing the storage volume of the folding table and facilitating the storage and placement of the folding table. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of a foldable support frame of the utility model.

[0021] Figure 2 It is a front view schematic diagram of a foldable support frame of the utility model.

[0022] Figure 3 It is an exploded schematic diagram of the foldable support unit in the utility model.

[0023] Figure 4 It is a schematic diagram of the synchronous rotation connection of two lower support rods and two upper support rods in the utility model.

[0024] Figure 5 It is a schematic diagram of the elevation structure of the connecting seat in the utility model.

[0025] Figure 6 It is a schematic diagram of the depression angle structure of the connecting seat in the utility model.

[0026] Figure 7It is an exploded schematic diagram of the locking mechanism in the utility model.

[0027] Figure 8 It is a front view schematic diagram of the connecting seat in the utility model.

[0028] Fig. 9 yes Figure 8 AA cross-sectional view of .

[0029] Fig.10 It is a cross-sectional schematic diagram of the connecting seat and the locking mechanism in the utility model along the horizontal direction.

[0030] Fig.11 It is a schematic diagram of the cooperation between the four locking parts and the corresponding locking grooves in the utility model.

[0031] Fig.12 The utility model is a three-dimensional schematic diagram of a foldable table.

[0032] Fig.13 The utility model is an exploded schematic diagram of a foldable table.

[0033] Fig.14 yes Fig.13 A magnified schematic diagram of B.

[0034] Fig.15 It is a schematic diagram of a clamping sleeve of a first clamping piece and a clamping platform in the utility model.

[0035] Fig.16 It is a schematic diagram of the storage state of the desktop, the bottom beam and the foldable support frame in the utility model. DETAILED DESCRIPTION

[0036] The utility model is further described in detail below with reference to the embodiments given in the accompanying drawings.

[0037] like Figures 1 to 11 As shown, the utility model provides a foldable support frame, which includes a support rod 1 and two foldable support units 2 respectively arranged at two ends of the support rod 1.

[0038] The two foldable support units 2 each include: a connecting base 21 fixedly connected to the corresponding end of the support rod 1, two lower support rods 22, 23 rotatably connected to the lower end of the connecting base 21 and can be rotated and folded relative to the connecting base 21 in a direction close to the support rod 1 or rotated and unfolded in a direction away from the support rod 1, two upper support rods 24, 25 rotatably connected to the upper end of the connecting base 21 and can be rotated and folded relative to the connecting base 21 in a direction close to the support rod 1 or rotated and unfolded in a direction away from the support rod 1, and a locking mechanism 26 for locking the two lower support rods 22, 23 and the two upper support rods 24, 25 after they are unfolded.

[0039] In each foldable support unit 2, the two lower support rods 22 and 23 are located on both sides of the lower ends of the corresponding ends of the support rod 1 in an outward-facing "X" shape after being unfolded, and the two upper support rods 24 and 25 are located on both sides of the upper ends of the corresponding ends of the support rod 1 in an inward-facing "X" shape after being unfolded, thereby forming two groups of roughly X-shaped support structures at both ends of the support rod 1, thereby improving the stability of the foldable support frame when it is unfolded and used. At the same time, in each foldable support unit 2, the two lower support rods 22 and 23 and the two upper support rods 24 and 25 are all close to the corresponding ends of the support rod 1 after being folded, thereby reducing the storage volume of the foldable support frame.

[0040] The upper ends of the two lower support rods 22 and 23 are each provided with a first rotating connector 221 and 231, and the lower ends of the two upper support rods 24 and 25 are each provided with a second rotating connector 241 and 251. The two lower support rods 22 and 23 are respectively rotatably connected to the lower end of the connecting seat 21 through the first rotating connectors 221 and 231 thereon, and the two upper support rods 24 and 25 are respectively rotatably connected to the upper end of the connecting seat 21 through the second rotating connectors 241 and 251 thereon.

[0041] The first rotating connecting heads 221, 231 of the two lower supporting rods 22, 23 are connected together by meshing with each other, and the second rotating connecting heads 241, 251 of the two upper supporting rods 24, 25 are connected together by meshing with each other, and the first rotating connecting heads 221, 231 of the two lower supporting rods 22, 23 are also respectively connected together by meshing with the second rotating connecting heads 241, 251 of the two upper supporting rods 24, 25, so that the two lower supporting rods 22, 23 and the two upper supporting rods 24, 25 can be synchronously rotated and folded or synchronously rotated and unfolded. That is to say, when the foldable support unit 2 is folded or unfolded, only one of the two lower supporting rods 22, 23 and the two upper supporting rods 24, 25 needs to be rotated to drive the other three to be synchronously rotated and folded or synchronously rotated and unfolded, so that the folding or unfolding operation of the foldable support unit 2 becomes more convenient and easy.

[0042] In order to realize the above-mentioned tooth meshing connection, the proximal sides of the first rotating connecting heads 221, 231 of the two lower support rods 22, 23 are respectively provided with bevel tooth portions 2211, 2311 for tooth meshing connection of the two, the distal sides of the first rotating connecting heads 221, 231 of the two lower support rods 22, 23 are respectively provided with bevel tooth portions 2212, 2312, the proximal sides of the second rotating connecting heads 241, 251 of the two upper support rods 24, 25 are respectively provided with bevel tooth portions 2411, 2511 for tooth meshing connection of the two, and the distal sides of the second rotating connecting heads 241, 251 of the two upper support rods 24, 25 are respectively provided with bevel tooth portions 2412, 2512 for tooth meshing connection with the bevel tooth portions 2212, 2312.

[0043] The lower end of the connecting seat 21 is symmetrically provided with two first U-shaped grooves 211, 212 which extend obliquely from top to bottom toward the front and rear outer sides of the support rod 1, and the upper end of the connecting seat 21 is symmetrically provided with two second U-shaped grooves 213, 214 which extend obliquely from bottom to top toward the front and rear outer sides of the support rod 1, and the two first U-shaped grooves 211, 212 and the two second U-shaped grooves 213, 214 are arranged diagonally in a cross shape, and the first rotating connecting heads 221, 231 of the two lower support rods 22, 23 extend into the corresponding first U-shaped grooves 211, 212 and are rotatably connected thereto through the first pin shafts 271, 272, and the second rotating connecting heads 241, 251 of the two upper support rods 24, 25 extend into the corresponding second U-shaped grooves 213, 214 and are rotatably connected thereto through the second pin shafts 273, 274. Moreover, the open ends 2111, 2121 of the two first U-shaped grooves 211, 212 and the open ends 2131, 2141 of the two second U-shaped grooves 213, 214 are arranged close to the support rod 1, so that the two lower support rods 22, 23 and the two upper support rods 24, 25 can be close to the support rod 1 after being folded; the closed ends 2112, 2122 of the two first U-shaped grooves 211, 212 and the closed ends 2112, 2122 of the two second U-shaped grooves 213, 214 The closed ends 2132, 2142 are arranged away from the support rod 1, and the two lower support rods 22, 23 are blocked by the closed ends 2112, 2122 of the corresponding first U-shaped grooves 211, 212 after being unfolded, and the two upper support rods 24, 25 are blocked by the closed ends 2132, 2142 of the corresponding second U-shaped grooves 213, 214 after being unfolded, thereby limiting the unfolding angles of the two lower support rods 22, 23 and the two upper support rods 24, 25.

[0044] The interior of the connecting seat 21 is provided with a hollow cavity 215 connected to the inner sides of the two first U-shaped grooves 211, 212 and the two second U-shaped grooves 213, 214. The locking mechanism 26 includes a locking block 261 and a locking block spring 262. The locking block 261 is movably arranged in the hollow cavity 215. Four locking portions 2611, 2612, 2613, 2614 are formed around the locking block 261. The first rotating connectors 221, 231 of the two lower support rods 22, 23 and the second rotating connectors 241, 251 of the two upper support rods 24, 25 are respectively provided with a locking groove 2213, 2313 , 2413, 2513, after the two lower support rods 22, 23 and the two upper support rods 24, 25 are unfolded, the four locking parts 2611, 2612, 2613, 2614 are snapped into the corresponding locking grooves 2213, 2313, 2413, 2513 so that the two lower support rods 22, 23 and the two upper support rods 24, 25 are locked in the unfolded position, and the locking block spring 262 directly or indirectly acts on the locking block 261 so that the four locking parts 2611, 2612, 2613, 2614 maintain the tendency of being snapped into the corresponding locking grooves 2213, 2313, 2413, 2513.

[0045] The locking mechanism 26 also includes an unlocking button 263, which includes a rod portion 2631 and a cap portion 2632 that are integrally arranged. The rod portion 2631 penetrates into the hollow cavity 215 and is fixedly connected to the locking block 261. The cap portion 2632 is exposed to the outside of the side of the hollow cavity 215 away from the support rod 1 for pressing operation when unlocking. In addition, a through hole 2151 is provided on the cavity wall of the hollow cavity 215 on the side away from the support rod 1 for the rod portion 2631 to penetrate into the hollow cavity 215. The locking block spring 262 is sleeved on the rod portion 2631, and one end of the locking block spring 262 is against the cap portion 2632, and the other end is against the positioning step portion 2152 in the through hole 2151. When the two lower support rods 22, 23 and the two upper support rods 24, 25 are in the unfolded state, the cap portion 2632 of the unlocking button 263 is pressed, the rod portion 2631 moves inward, and the locking block 261 moves inward accordingly and causes the four locking portions 2611, 2612, 2613, 2614 to escape from the corresponding locking grooves 2213, 2313, 2413, 2513, thereby releasing the locking of the two lower support rods 22, 23 and the two upper support rods 24, 25, that is, loosening the locking mechanism 26. At this time, the two lower support rods 22, 23 and the two upper support rods 24, 25 can be rotated and folded in the direction close to the support rod 1.

[0046] The support rod 1 is horizontally arranged and extends in the left-right direction to define its length. After being unfolded, the two lower support rods 22 and 23 are further inclined outward from top to bottom along the length direction L of the support rod 1. After being unfolded, the two upper support rods 24 and 25 are further inclined outward from bottom to top along the length direction (i.e., the left-right direction) of the support rod 1. This design can further improve the support stability of the foldable support frame after being unfolded.

[0047] In each foldable support unit 2 , the lengths of the two lower support rods 22 , 23 and the two upper support rods 24 , 25 are all less than half the length of the support rod 1 , so that the two foldable support units 2 can be symmetrically folded at both ends of the support rod 1 .

[0048] Whether the two foldable support units 2 are in the unfolded state or in the folded state, the two lower support rods 22, 23 and the two upper support rods 24, 25 in one foldable support unit 2 are aligned one by one with the two lower support rods 22, 23 and the two upper support rods 24, 25 in the other foldable support unit 2.

[0049] A connecting sleeve 216 is provided on one side of the connecting seat 21 facing the supporting rod 1 , and the end of the supporting rod 1 is inserted into the connecting sleeve 216 and fixedly connected thereto by screws.

[0050] like Figures 12 to 16As shown, the utility model provides a foldable table, including a table top 3, a bottom beam 4 and a support frame 5. The table top 3 includes a plurality of table top units 31 arranged in sequence along the left-right direction, and two adjacent table top units 31 are rotatably connected along the up-down direction. There are two bottom beams 4, and the two bottom beams 4 are detachably arranged at intervals at the bottom of the table top 3 along the front-back direction to support the table top 3, and each bottom beam 4 is composed of two section rods 41 rotatably connected in the horizontal direction. The support frame 5 is a foldable support frame as described above, wherein the lower ends of the two lower support rods 22, 23 are provided with foot pads 222, 232 for contacting the ground, and the upper ends of the two upper support rods 24, 25 are detachably clamped on the corresponding ends of the two bottom beams 4.

[0051] The bottom center of the leftmost and rightmost table board units 31 are both provided with a convex clamping platform 310 extending in the front-to-back direction, and the left and right ends of the two bottom beams 4 are both provided with a first clamping member 410 opening upward, and each first clamping member 410 is detachably clamped on the end of the corresponding clamping platform 310, so that the two bottom beams 4 are detachably arranged at the bottom of the table board 3. The upper ends of the two upper support rods 24 and 25 are both provided with a second clamping member 242 and 252 opening upward, and the second clamping member 242 and 252 is detachably clamped on the corresponding end of the two bottom beams 4 and fixedly connected thereto by screws.

[0052] When the foldable table of the utility model is stored, the table top 3, the bottom beam 4 and the support frame 5 can be separated from each other, and the separated table top 3, the bottom beam 4 and the support frame 5 can be folded and stored separately, so as to reduce the storage volume of the foldable table. Among them: when the table top 3 is folded and stored, the table top units 31 are rotated and folded together in pairs along the vertical direction; when the two bottom beams 4 are folded and stored, the two section rods 41 of each bottom beam 4 are rotated and folded together along the horizontal direction; when the support frame 5 is folded and stored, after the locking mechanism 26 is released, the two lower support rods 22, 23 and the two upper support rods 24, 25 in the two foldable support units 2 are rotated and folded to be close to the support rod 1.

[0053] The above is only a preferred embodiment of the present utility model, and it cannot be used to limit the scope of the present utility model. That is, all simple equivalent changes and modifications made according to the scope of the patent application of the present utility model and the content of the utility model description are still within the scope of the present utility model patent.

Claims

1. A foldable support frame, comprising a support rod and two foldable support units respectively arranged at both ends of the support rod; characterized in that: The two foldable support units each include a connection seat fixedly connected to the corresponding end of the support rod, two lower support rods rotatably connected to the lower end of the connection seat and capable of rotating and folding in a direction close to the support rod or rotating and unfolding in a direction away from the support rod relative to the connection seat, two upper support rods rotatably connected to the upper end of the connection seat and capable of rotating and folding in a direction close to the support rod or rotating and unfolding in a direction away from the support rod relative to the connection seat, and a locking mechanism for locking the two lower support rods and the two upper support rods after they are unfolded; In each foldable support unit, the two lower support rods are in an outward-facing "X" shape after being unfolded and are located on both sides of the lower ends of the corresponding ends of the support rod, and the two upper support rods are in an inward-facing "X" shape after being unfolded and are located on both sides of the upper ends of the corresponding ends of the support rod, and the two lower support rods and the two upper support rods are close to the corresponding ends of the support rod after being folded.

2. A foldable support frame according to claim 1, characterized in that: The upper ends of the two lower support rods are each provided with a first rotating connection head, and the lower ends of the two upper support rods are each provided with a second rotating connection head, the two lower support rods are respectively rotatably connected to the lower end of the connecting seat through the first rotating connection heads thereon, and the two upper support rods are respectively rotatably connected to the upper end of the connecting seat through the second rotating connection heads thereon, and the first rotating connection heads of the two lower support rods are meshed with each other and connected together, the second rotating connection heads of the two upper support rods are meshed with each other and connected together, and the first rotating connection heads of the two lower support rods are also meshed with the second rotating connection heads of the two upper support rods and connected together, so that the two lower support rods and the two upper support rods can be synchronously rotated and folded or synchronously rotated and unfolded.

3. A foldable support frame according to claim 2, characterized in that: The lower end of the connecting seat is symmetrically provided with two first U-shaped grooves that extend obliquely from top to bottom toward the front and rear outer sides of the support rod, and the upper end of the connecting seat is symmetrically provided with two second U-shaped grooves that extend obliquely from bottom to top toward the front and rear outer sides of the support rod, and the two first U-shaped grooves and the two second U-shaped grooves are arranged diagonally in a cross shape, the first rotating connecting heads of the two lower support rods extend into the corresponding first U-shaped grooves and are rotatably connected thereto through the first pin shaft, and the second rotating connecting heads of the two upper support rods extend into the corresponding second U-shaped grooves and are rotatably connected thereto through the second pin shaft, and the open ends of the two first U-shaped grooves and the two second U-shaped grooves are arranged close to the support rod, and the closed ends of the two first U-shaped grooves and the second U-shaped grooves are arranged away from the support rod, and the two lower support rods are blocked by the closed ends of the corresponding first U-shaped grooves after being unfolded, and the two upper support rods are blocked by the closed ends of the corresponding second U-shaped grooves after being unfolded.

4. A foldable support frame according to claim 3, characterized in that: The interior of the connecting seat is provided with a hollow cavity that is connected to the inner sides of the two first U-shaped grooves and the two second U-shaped grooves, and the locking mechanism includes a locking block and a locking block spring, and the locking block is movably arranged in the hollow cavity, and four locking parts are formed around the locking block, and a locking groove is respectively provided on the first rotating connecting head of the two lower support rods and the second rotating connecting head of the two upper support rods. After the two lower support rods and the two upper support rods are unfolded, the four locking parts are snapped into the corresponding locking grooves so that the two lower support rods and the two upper support rods are locked in the unfolded position, and the locking block spring directly or indirectly acts on the locking block so that the four locking parts maintain a tendency to snap into the corresponding locking grooves.

5. A foldable support frame according to claim 4, characterized in that: The locking mechanism also includes an unlocking button, which includes a rod portion and a cap portion which are integrally arranged, the rod portion being inserted into the hollow cavity and fixedly connected to the locking block, the cap portion being exposed to the outside of the hollow cavity on a side away from the support rod for a pressing operation when unlocking, and a through hole for the rod portion to penetrate into the hollow cavity is provided on the cavity wall on a side away from the support rod, the locking block spring is sleeved on the rod portion, and one end of the locking block spring is abutted against the cap portion, and the other end is abutted against the positioning step portion in the through hole.

6. The foldable support frame according to claim 1, characterized in that: In each foldable support unit, the lengths of the two lower support rods and the two upper support rods are both less than half the length of the support rod, so that the two foldable support units can be symmetrically folded at the two ends of the support rod.

7. The foldable support frame according to claim 1, characterized in that: When the two foldable support units are in the unfolded state or the folded state, the two lower support rods and the two upper support rods in one of the foldable support units are aligned one by one with the two lower support rods and the two upper support rods in the other foldable support unit.

8. The foldable support frame according to claim 1, characterized in that: A connecting sleeve is provided on one side of the connecting seat facing the supporting rod, and the end of the supporting rod is inserted into the connecting sleeve and fixedly connected with the supporting rod by screws.

9. A foldable table, comprising a table top, a bottom beam and a support frame, characterized in that: The table top includes a plurality of table top units arranged in sequence along the left-right direction, and two adjacent table top units are rotatably connected along the up-down direction. The bottom beams are provided with two, and the two bottom beams are detachably arranged at intervals at the bottom of the table top along the front-back direction, and each bottom beam is composed of two section rods rotatably connected along the horizontal direction. The support frame is a foldable support frame as described in any one of claims 1-8, wherein the lower ends of the two lower support rods are provided with foot pads for contacting the ground, and the upper ends of the two upper support rods are detachably clamped on the corresponding ends of the two bottom beams.

10. A foldable table according to claim 9, characterized in that: A card platform extending in the front-to-back direction is protruded from the center of the bottom surface of the leftmost and rightmost table top units, and a first card member opening upward is provided at the left and right ends of the two bottom beams, and the first card member can be detachably clamped on the end of the corresponding card platform; a second card member opening upward is provided at the upper end of the two upper support rods, and the second card member can be detachably clamped on the corresponding end of the two bottom beams and fixedly connected thereto by screws.

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