A rotating connection structure and a foldable dish rack having the same

Abstract

The present invention discloses a rotatable connection structure and a foldable dish rack having the same. The rotatable connection structure comprises a first cover body and a second cover body. Two first support frames of the foldable dish rack and two rotating shafts of the first cover body are rotatably connected, and two second support frames and two rotating shafts of the second cover body are rotatably connected. When the foldable dish rack is not in use, the two first support frames and the two second support frames can be folded by rotating them, so as to realize the storage function, occupy a small space, and the folding operation is simple and convenient; when the foldable dish rack is in use, the two support frames are unfolded or opened, and the two limiting surfaces of the first positioning protrusion are used to limit the first support frame from continuing to rotate, and the two limiting surfaces of the second positioning protrusion are used to limit the second support frame from continuing to rotate, so as to play a positioning role, so that the first support frame and the second support frame are cross-arranged, so as to play the role of placing tableware and draining water, and the structural design is simple and reasonable.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen supplies, and in particular to a rotary connection structure and a foldable dish rack having the same. Background Art

[0002] There are still a lot of water droplets on the surface of dishes and other kitchen utensils after washing. If they are placed flat for a long time, bacteria will easily grow, which is unhygienic. Moreover, if they are placed randomly, they will take up a lot of space, which will bring a lot of inconvenience to the daily life of users. Therefore, dish racks specially used for placing kitchen dishes and other tableware are produced on the market, and they have now become one of the indispensable utensils in the kitchen.

[0003] Although dish racks can significantly improve the convenience of daily life in the kitchen, they still generally have the following technical defects and shortcomings: ① Although there are many types of traditional dish rack products, they are basically of an integral grid structure, which cannot be folded and stored when not in use, resulting in a large amount of space occupied; ② Even if some dish rack products can achieve the folding function, the storage operation is often cumbersome due to the overly complex structural design, and the structure is prone to damage during frequent folding, which has low practicality and is difficult to meet the daily use needs of users.

[0004] Therefore, there is an urgent need in the prior art to invent a dish rack that is easy to fold and store and has a simple and reasonable structural design and high structural reliability. Summary of the invention

[0005] In order to overcome at least one of the defects of the prior art described above, the present invention provides a rotating connection structure and a foldable dish rack having the same, which has the characteristics of simple and reasonable structural design, high structural reliability and easy folding and storage function.

[0006] The technical solution adopted by the present invention to solve the problem is:

[0007] A rotary connection structure, comprising:

[0008] A first cover body, wherein a first end surface of the first cover body is provided with a first rotating shaft, a second rotating shaft and a first positioning protrusion, and a first limiting surface and a second limiting surface are respectively provided on a side of the first positioning protrusion facing the first rotating shaft and the second rotating shaft;

[0009] A second cover body, wherein a third rotating shaft, a fourth rotating shaft and a second positioning protrusion are disposed on a first end surface of the second cover body, and a third limiting surface and a fourth limiting surface are disposed on a side of the second positioning protrusion facing the third rotating shaft and the fourth rotating shaft, respectively;

[0010] The first cover body and the second cover body are fixedly connected, and the first end surface of the first cover body and the first end surface of the second cover body are arranged opposite to each other, and the first rotating shaft and the second rotating shaft are arranged opposite to the third rotating shaft and the fourth rotating shaft respectively.

[0011] Furthermore, the first rotating shaft and the second rotating shaft are symmetrically arranged on both sides of a center line of the first cover body extending in the vertical direction;

[0012] The third rotation axis and the fourth rotation axis are symmetrically arranged on both sides of a center line of the second cover body extending in a vertical direction.

[0013] Further, the first limiting surface and the second limiting surface are arranged obliquely relative to the center line of the first cover body extending in the vertical direction, and the third limiting surface and the fourth limiting surface are arranged obliquely relative to the center line of the second cover body extending in the vertical direction;

[0014] Furthermore, the first limiting surface and the second limiting surface are symmetrically arranged on both sides of a center line extending in the vertical direction of the first cover body, and the third limiting surface and the fourth limiting surface are symmetrically arranged on both sides of a center line extending in the vertical direction of the second cover body.

[0015] Furthermore, the first end surface of the first cover body is further provided with a first partition bar, and the first partition bar is arranged along the vertical direction and is arranged in the middle of the first rotating shaft and the second rotating shaft;

[0016] The first end surface of the second cover body is further provided with a second partition bar, and the second partition bar is arranged along the vertical direction and is arranged in the middle of the third rotating shaft and the fourth rotating shaft.

[0017] Furthermore, the first end surface of the first cover body is also provided with an assembly portion, and the first end surface of the second cover body is provided with an assembly hole, and an external connector passes through the assembly hole and is inserted into the assembly portion to fix the first cover body and the second cover body together.

[0018] Furthermore, the assembly portion is a nut, the assembly hole is a screw hole, and the external connection piece is any one of a screw, a bolt or a bolt.

[0019] Based on the same design concept, the present invention also provides a foldable dish rack including the above-mentioned rotating connection structure, the foldable dish rack also includes a first support frame and a second support frame, the ends of the two first support frames are rotatably connected to the first rotating shaft and the second rotating shaft respectively, and the two second support frames are rotatably connected to the third rotating shaft and the fourth rotating shaft respectively;

[0020] Wherein, the second supporting frame is arranged on the top of the first supporting frame.

[0021] Furthermore, the foldable dish rack also includes a gasket, which is sleeved on the third rotating shaft and the fourth rotating shaft and is arranged between the first supporting frame and the second supporting frame to separate the first supporting frame from the second supporting frame.

[0022] Furthermore, the foldable dish rack also includes a water receiving tray, and a plurality of limit protrusions extending upward are provided on the top circumference of the water receiving tray to limit and block the movement of the first supporting frame.

[0023] Furthermore, the foldable dish rack further comprises a cylinder structure, and the cylinder structure is detachably mounted on the second supporting frame;

[0024] In addition, the second supporting frame is provided with a grid structure formed by combining a plurality of strip structures arranged at intervals.

[0025] In summary, the rotary connection structure and the foldable dish rack having the rotary connection structure provided by the present invention have at least the following technical effects compared with the prior art:

[0026] 1) The rotatable connection structure provided by the present invention comprises a first cover body and a second cover body, wherein the first rotating shaft and the second rotating shaft on the first cover body are used to be rotatably connected to the ends of the two first supporting frames, and the third rotating shaft and the fourth rotating shaft on the second cover body are used to be rotatably connected to the ends of the two second supporting frames. After the first cover body and the second cover body are fixedly connected and assembled together, the first supporting frame and the second supporting frame can be connected together; therefore, when the foldable dish rack is not in use, the two first supporting frames and the two second supporting frames can be folded by rotating them to realize the storage function, which occupies a small space and is simple and convenient to fold;

[0027] 2) The rotatable connection structure provided by the present invention has a first cover body further including a first positioning protrusion, and a second cover body further including a second positioning protrusion. When the foldable dish rack is in use, the two first support frames and the two second support frames can be unfolded or opened by rotating them respectively; and since the first positioning protrusion is provided with a first limiting surface and a second limiting surface, it is used to abut against the first support frame after it rotates a certain angle, restricting its continued rotation, thereby playing a positioning role; the second positioning protrusion is provided with a third limiting surface and a fourth limiting surface, which are used to abut against the second support frame after it rotates a certain angle, restricting its continued rotation, thereby playing a positioning role; finally, the first support frame of the foldable dish rack is unfolded to support the second support frame and the tableware placed on the top thereof, and the second support frame is unfolded to place the tableware and play a draining effect. The structural design is simple and reasonable, and the structural damage is not easy to occur even after frequent flipping and folding, and the structural stability is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the first cover body of the present invention;

[0029] Figure 2 It is a structural schematic diagram of the second cover body of the present invention;

[0030] Figure 3 It is a structural schematic diagram of the first cover body and the first supporting frame of the present invention;

[0031] Figure 4 for Figure 3 The local enlarged schematic diagram H shown;

[0032] Figure 5 It is a structural schematic diagram of the second cover body and the second supporting frame of the present invention;

[0033] Figure 6 for Figure 5 The local enlarged schematic diagram H shown;

[0034] Figure 7 It is a schematic structural diagram of the foldable dish rack of the present invention in an unfolded state;

[0035] Figure 8 It is a schematic structural diagram of the foldable dish rack of the present invention in a folded state;

[0036] The meanings of the reference numerals are as follows:

[0037] 1. First cover body; 11. First rotating shaft; 12. Second rotating shaft; 13. First positioning protrusion; 131. First limiting surface; 132. Second limiting surface; 14. Assembly part; 15. First partition bar; 2. Second cover body; 21. Third rotating shaft; 22. Fourth rotating shaft; 23. Second positioning protrusion; 231. Third limiting surface; 232. Fourth limiting surface; 24. Assembly hole; 25. Second partition bar; 3. First supporting frame; 4. Second supporting frame; 41. Grid structure; 5. Gasket; 6. Water collecting tray; 61. Limiting protrusion; 7. Cylinder structure. DETAILED DESCRIPTION

[0038] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0039] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0041] See also Figure 1 , Figure 3 and Figure 4 As shown, according to an embodiment of the present invention, the rotating connection structure includes a first cover body 1, a first end surface of the first cover body 1 is provided with a first rotating shaft 11, a second rotating shaft 12 and a first positioning protrusion 13, and a first limiting surface 131 and a second limiting surface 132 are respectively provided on the side of the first rotating shaft 11 and the second rotating shaft 12 of the first positioning protrusion 13. The first rotating shaft 11 and the second rotating shaft 12 on the first cover body 1 are respectively used to be rotatably connected to the ends of the two first supporting frames 3 of the foldable dish rack. When the foldable dish rack is not in use, the two first supporting frames 3 can be rotated toward each other to be turned over and folded together.

[0042] See also Figure 2 , Figure 5 and Figure 6 As shown, the rotary connection structure also includes a second cover body 2, and the first end surface of the second cover body 2 is provided with a third rotating shaft 21, a fourth rotating shaft 22 and a second positioning protrusion 23, and the second positioning protrusion 23 is provided with a third limiting surface 231 and a fourth limiting surface 232 on the side facing the third rotating shaft 21 and the fourth rotating shaft 22. The third rotating shaft 12 and the fourth rotating shaft 12 on the second cover body 2 are respectively used to be rotatably connected to the ends of the two second supporting frames 4 of the foldable dish rack. When the foldable dish rack is not in use, the two second supporting frames 4 can be rotated toward each other to be turned over and folded together.

[0043] In the technical solution of this embodiment, the first cover body 1 and the second cover body 2 are fixedly connected, and the first end surface of the first cover body 1 and the first end surface of the second cover body 2 are arranged opposite to each other, and the first rotating shaft 11 and the second rotating shaft 12 are arranged opposite to the third rotating shaft 21 and the fourth rotating shaft 22 respectively. Specifically, after the first cover body 1 and the second cover body 2 are fixedly connected and assembled together, they can be used as an intermediate connection structure to connect the first support frame 3 and the second support frame 4 together in a flippable and foldable manner, and produce the following technical effects:

[0044] ①, when the foldable dish rack is not in use, the two first support frames 3 and the two second support frames 4 can be folded together by rotating them toward each other, so as to realize the storage function, occupy a small space, and the folding operation is simple and convenient;

[0045] ②. When the foldable dish rack needs to be used, the two first support frames 3 can be unfolded or opened by rotating them in the opposite direction, and since the first positioning protrusion 13 is provided with a first limiting surface 131 and a second limiting surface 132, when the two first support frames 3 are rotated by a certain angle, they abut against the two limiting surfaces, thereby limiting their continued rotation, which plays a positioning role; similarly, the two second support frames 4 can be unfolded or opened by rotating them in the opposite direction, and since the first positioning protrusion 13 is provided with a first limiting surface 131 and a second limiting surface 132, when the two second support frames 4 are rotated by a certain angle, they abut against the two limiting surfaces, thereby limiting their continued rotation, which plays a positioning role; after the first support frame 3 and the second support frame 4 are both folded and unfolded, the first support frame 3 of the foldable dish rack can be used to support the second support frame 4 and the tableware placed on the top thereof, and the second support frame 4 can be used to place tableware and drain the tableware, the structural design is simple and reasonable, and the structural damage is not easy to occur even after frequent flipping and folding, and the structural stability is good.

[0046] In the preferred embodiment of this embodiment, see Figure 1 As shown, the first rotating shaft 11 and the second rotating shaft 12 are symmetrically arranged on both sides of the center line a extending in the vertical direction of the first cover body 1. Specifically, through this structural design, it can be ensured that when the two ends of the first support frame 3 are equal in length, the two first support frames 3 can be symmetrically arranged when flipped and unfolded, thereby improving the stability of the first support frame 3 when supporting the second support frame 4 and the tableware placed on the top. Figure 2As shown, the third rotating shaft 21 and the fourth rotating shaft 22 are symmetrically arranged on both sides of the center line b extending in the vertical direction of the second cover body 2. Specifically, through this structural design, it can be ensured that when the two ends of the second support frame 4 are equal in length, the two second support frames 4 can be symmetrically arranged when flipped and unfolded, thereby improving the stability of the second support frame 4 when supporting the placed tableware.

[0047] See also Figure 1 As shown, in a further technical solution of this embodiment, the first limiting surface 131 and the second limiting surface 132 are arranged obliquely relative to the center line a extending in the vertical direction of the first cover body 1, so as to ensure that the two first support frames 3 are arranged crosswise at a certain angle when flipped and unfolded, so as to achieve the supporting effect of the first support frame 3 on the second support frame 4 and the tableware placed on the top thereof. Figure 2 As shown, the third limiting surface 231 and the fourth limiting surface 232 are inclined relative to the center line b extending in the vertical direction of the second cover body 2, thereby ensuring that the two second support frames 4 are cross-set at an angle of a certain size when flipped and unfolded, thereby achieving the supporting effect of the second support frames 4 on the tableware placed thereon.

[0048] Also, see Figure 1 As shown, the first limiting surface 131 and the second limiting surface 132 are symmetrically arranged on both sides of the center line a extending in the vertical direction of the first cover body 1, ensuring that the two first support frames 3 can be arranged symmetrically when flipped and unfolded, thereby improving the stability of the first support frame 3 when supporting the second support frame 4 and the tableware placed on the top. Figure 2 As shown, the third limiting surface 231 and the fourth limiting surface 232 are symmetrically arranged on both sides of the center line b extending in the vertical direction of the second cover body 2, ensuring that the two second support frames 4 can also be symmetrically arranged left and right when flipped and unfolded, thereby improving the stability of the second support frames 4 when supporting the placed tableware.

[0049] See also Figure 1 As shown, in a further technical solution of this embodiment, the first end surface of the first cover body 1 is further provided with a first partition bar 15, which is arranged along the vertical direction and is arranged in the middle of the first rotating shaft 11 and the second rotating shaft 12. Specifically, the first partition bar 15 is also arranged along the direction of the center line a extending in the vertical direction of the first cover body 1, and is arranged in the middle of the first rotating shaft 11 and the second rotating shaft 12, that is, under the premise that the first rotating shaft 11 and the second rotating shaft 12 are symmetrically arranged, the two first support frames 3 will not cause structural damage due to mutual collision when they are flipped, folded, opened and closed, thereby improving the structural strength of the foldable dish rack.

[0050] Similarly, see Figure 2 As shown, the first end surface of the second cover body 2 is further provided with a second partition bar 25, which is arranged along the vertical direction and is arranged in the middle of the third rotating shaft 21 and the fourth rotating shaft 22. Specifically, the second partition bar 25 is also arranged along the direction of the center line b extending in the vertical direction of the second cover body 2, and is arranged in the middle of the third rotating shaft 21 and the fourth rotating shaft 22, that is, under the premise that the third rotating shaft 21 and the fourth rotating shaft 22 are symmetrically arranged, the two second support frames 4 will not cause structural damage due to mutual collision when they are flipped, folded, opened and closed, and the structural strength of the foldable dish rack is further improved.

[0051] See also Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, in another embodiment of the present invention, the first end surface of the first cover body 1 is further provided with an assembly portion 14, and the first end surface of the second cover body 2 is provided with an assembly hole 24, and the external connecting member passes through the assembly hole 24 and is inserted into the assembly portion 14, so as to fix the first cover body 1 and the second cover body 2 together. In the technical solution of this embodiment, the assembly portion 14 is a convex structure with a groove and embedded in the first cover body 1, and the external connecting member passes through the assembly hole 24, and its end is inserted into the groove of the assembly portion 14, so that the first cover body 1 and the second cover body 2 can be fixedly connected together, the assembly of the first cover body 1 and the second cover body 2 is completed, and the first support frame 3 and the second support frame 4 can be flipped and folded for connection.

[0052] In a preferred solution of this embodiment, the assembly portion 14 is a nut, the assembly hole 24 is a screw hole, and the external connection member is any one of a screw, a bolt, or a bolt. Specifically, after any one of the external connection members, a screw, a bolt, or a bolt, passes through the screw hole and is screwed into the nut, the first cover body 1 and the second cover body 2 can be combined together. More specifically, the nut and the first cover body 1 can be an integrated structure.

[0053] See Figure 7 As shown, based on the same design concept, the present invention also provides an embodiment of a foldable dish rack, and the foldable dish rack includes the rotating connection structure described in the above embodiments.

[0054] See also Figure 3-Figure 6As shown, in the technical solution of this embodiment, the foldable dish rack also includes a first support frame 3 and a second support frame 4, the ends of the two first support frames 3 are rotatably connected to the first rotating shaft 11 and the second rotating shaft 12 respectively, and the two second support frames 4 are rotatably connected to the third rotating shaft 21 and the fourth rotating shaft 22 respectively. Wherein, when the foldable dish rack is not in use, the two first support frames 3 and the two second support frames 4 can be rotated towards each other to be turned over and folded together; when the foldable dish rack is used, the two first support frames 3 and the two second support frames 4 are rotated in the opposite direction to unfold or open the two to form a cross-arranged frame structure for placing tableware and achieving a draining effect. More specifically, the first support frame 3 and the second support frame 4 are both made of aluminum material, with high structural strength and stable structural performance.

[0055] See also Figure 7 As shown, the second support frame 4 is arranged on the top of the first support frame 3. The second support frame 4 is used to place plates upright or other tableware diagonally and has a draining effect; the first support frame 3 is used to support the second support frame 4, thereby indirectly supporting the tableware on the second support frame 4.

[0056] See also Figure 4 and Figure 6 As shown, in a preferred solution of this embodiment, the foldable dish rack further includes a gasket 5, which is sleeved on the third rotating shaft 21 and the fourth rotating shaft 22, and is disposed between the first supporting frame 3 and the second supporting frame 4, and is used to separate the first supporting frame 3 and the second supporting frame 4. In this preferred solution, by disposing a circular gasket 5 between the first supporting frame 3 and the second supporting frame 4, the two can be separated, thereby preventing the first supporting frame 3 and the second supporting frame 4 from rubbing against each other when they are flipped, folded, opened and closed, thereby causing structural wear or damage, and improving the service life of the foldable dish rack.

[0057] See also Figure 7 and Figure 8 As shown, in another preferred embodiment of the present invention, the foldable dish rack further comprises a water collecting tray 6, and a plurality of upwardly extending limiting protrusions 61 are provided on the top periphery of the water collecting tray 6, which are used to limit and block the movement of the first support frame 3. In the preferred embodiment, the water collecting tray 6 is used to collect the water drained from the tableware placed on the second support frame 4, and can also serve to lay the tableware flat. More specifically, by providing the limiting protrusions 61 on the top periphery of the water collecting tray 6, the first support frame 3 can be prevented from sliding out from both sides of the water collecting tray 6 when the foldable dish rack is unfolded.

[0058] See also Figure 7As shown, in another preferred solution of this embodiment, the foldable dish rack further comprises a cylinder structure 7, and the cylinder structure 7 is detachably mounted on the second supporting frame 4. In this preferred technical solution, the cylinder structure 7 is a container mechanism with an opening at the top, which is used to place tableware such as knives and forks and has a draining effect.

[0059] See also Figure 8 As shown, when the foldable dish rack is in the folded state, the cylinder structure 7 is removed from the second supporting frame 4 and placed on the top of the water receiving tray 6.

[0060] Also, see Figure 5 As shown, the second support frame 4 is provided with a grid structure 41 formed by a combination of a plurality of strip structures arranged at intervals. Figure 7 As shown, when the foldable dish rack is in the unfolded state, the gaps between the grid structures 41 can be used to place plates or other tableware with handles upright, and the entire grid structure 41 can be used to place tableware diagonally.

[0061] See also Figure 8 As shown, when the foldable dish rack is in a folded state, the grid structure 41 on the second supporting frame 4 can be used to lay tableware flat and play a role in draining water.

[0062] In summary, the first rotating shaft 11 and the second rotating shaft 12 on the first cover body 1 provided by the present invention are used to be rotatably connected to the ends of the two first supporting frames 3 of the foldable dish rack, and the third rotating shaft 21 and the fourth rotating shaft 22 on the second cover body 2 are used to be rotatably connected to the ends of the two second supporting frames 4 of the foldable dish rack. After the first cover body 1 and the second cover body 2 are combined together, the first supporting frame 3 and the second supporting frame 4 can be connected together. Therefore, when the foldable dish rack is not in use, the two first supporting frames 3 and the two second supporting frames 4 can be folded by rotating them to realize the storage function, which occupies little space and is simple and convenient to fold.

[0063] In addition, the first cover body 1 provided by the present invention further includes a first positioning protrusion 13, and the second cover body 2 further includes a second positioning protrusion 23. When the foldable dish rack is in use, the two first support frames 3 and the two second support frames 4 can be respectively rotated to unfold or open the two. In addition, since the first positioning protrusion 13 is provided with a first limiting surface 131 and a second limiting surface 132, it is used to abut against the first support frame 1 after it rotates a certain angle, restricting it from continuing to rotate, thereby playing a positioning role; the second positioning protrusion 23 is provided with a third limiting surface 231 and a fourth limiting surface 232, which is used to abut against the second support frame 4 after it rotates a certain angle, restricting it from continuing to rotate, thereby playing a positioning role; finally, the first support frame 3 of the foldable dish rack is unfolded to support the second support frame 4 and the tableware placed on the top thereof, and the second support frame 4 is unfolded to place the tableware and play a draining effect, the structural design is simple and reasonable, and it is not easy to be damaged even after frequent flipping and folding, and the structural stability is good and the structural strength is high.

[0064] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above-mentioned technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

1. A rotary connection structure, characterized in that: include: A first cover body, wherein a first end surface of the first cover body is provided with a first rotating shaft, a second rotating shaft and a first positioning protrusion, and a first limiting surface and a second limiting surface are respectively provided on a side of the first positioning protrusion facing the first rotating shaft and the second rotating shaft; A second cover body, wherein a third rotating shaft, a fourth rotating shaft and a second positioning protrusion are disposed on a first end surface of the second cover body, and a third limiting surface and a fourth limiting surface are disposed on a side of the second positioning protrusion facing the third rotating shaft and the fourth rotating shaft, respectively; Wherein, the first cover body and the second cover body are fixedly connected, and the first end surface of the first cover body and the first end surface of the second cover body are arranged opposite to each other, and the first rotating shaft and the second rotating shaft are arranged opposite to the third rotating shaft and the fourth rotating shaft respectively; The first rotating shaft and the second rotating shaft are symmetrically arranged on two sides of a center line of the first cover body extending in a vertical direction; The third rotating shaft and the fourth rotating shaft are symmetrically arranged on both sides of a center line of the second cover body extending in the vertical direction; The first limiting surface and the second limiting surface are arranged obliquely relative to a center line extending along a vertical direction of the first cover body, and the third limiting surface and the fourth limiting surface are arranged obliquely relative to a center line extending along a vertical direction of the second cover body; Furthermore, the first limiting surface and the second limiting surface are symmetrically arranged on both sides of a center line extending in the vertical direction of the first cover body, and the third limiting surface and the fourth limiting surface are symmetrically arranged on both sides of a center line extending in the vertical direction of the second cover body.

2. The rotary connection structure according to claim 1, characterized in that: The first end surface of the first cover body is further provided with a first partition bar, which is arranged in a vertical direction and is arranged in the middle of the first rotating shaft and the second rotating shaft; The first end surface of the second cover body is further provided with a second partition bar, and the second partition bar is arranged along the vertical direction and is arranged in the middle of the third rotating shaft and the fourth rotating shaft.

3. The rotary connection structure according to claim 1, characterized in that: The first end surface of the first cover body is also provided with an assembly portion, and the first end surface of the second cover body is provided with an assembly hole. The external connecting member passes through the assembly hole and is inserted into the assembly portion to fix the first cover body and the second cover body together.

4. The rotary connection structure according to claim 3, characterized in that: The assembly portion is a nut, the assembly hole is a screw hole, and the external connection piece is any one of a screw, a bolt or a bolt.

5. A foldable dish rack comprising the rotating connection structure according to any one of claims 1 to 4, characterized in that: The foldable dish rack further comprises a first support frame and a second support frame, the ends of the two first support frames are rotatably connected to the first rotating shaft and the second rotating shaft respectively, and the two second support frames are rotatably connected to the third rotating shaft and the fourth rotating shaft respectively; Wherein, the second supporting frame is arranged on the top of the first supporting frame.

6. The foldable dish rack according to claim 5, characterized in that: The foldable dish rack further comprises a gasket, which is sleeved on the third rotating shaft and the fourth rotating shaft and arranged between the first supporting frame and the second supporting frame to separate the first supporting frame from the second supporting frame.

7. The foldable dish rack according to claim 5, characterized in that: The foldable dish rack also includes a water receiving tray, and a plurality of limit protrusions extending upward are provided on the top circumference of the water receiving tray to limit and block the movement of the first supporting frame.

8. The foldable dish rack according to claim 5, characterized in that: The foldable dish rack further comprises a cylinder structure, and the cylinder structure is detachably mounted on the second supporting frame; In addition, the second supporting frame is provided with a grid structure formed by combining a plurality of strip structures arranged at intervals.

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