Rotary locking connection device and shelving rack

Abstract

A rotary locking connection device, and a shelving rack having the rotary locking connection device. The rotary locking connection device comprises: a rotating member (110); a first coupling member (100) rotatably mounted at one end of the rotating member (110), wherein an end of the first coupling member (100) is provided with a first mounting portion (130), and the first mounting portion (130) is of a recess-projection structure; and a second coupling member (120) rotatably mounted at the other end of the rotating member (110) and provided with a second mounting portion (140), wherein the second mounting portion (140) is provided with a projection-recess structure, and the first mounting portion (130) and the second mounting portion (140) are correspondingly coupled with each other. The first coupling member (100) and the second coupling member (120) can be oppositely inserted into each other and locked together by means of the first mounting portion (130) and the second mounting portion (140). The rotary locking connection device can simplify the assembly process, and is concealed inside connected articles by means of embedded design, thereby improving the aesthetic appeal of a product.

Description

Rotary locking connecting device and storage rack TECHNICAL FIELD

[0001] The present application relates to the technical field of household product manufacturing, in particular to a rotary locking connecting device and a storage rack. BACKGROUND

[0002] Storage racks are commonly used household products and are widely used in homes, offices, stores and other places. Traditional storage racks are mostly fixed structures, which results in a large packaging size during transportation, thereby increasing the logistics cost. In addition, there are also some storage rack products on the market that are designed to be disassembled, although the packaging size of such products is smaller, but the assembly and disassembly process is relatively cumbersome, often requiring special tools and a long time to complete the assembly, which brings inconvenience to users. In addition, traditional storage racks are prone to instability during use, affecting user experience.

[0003] In recent years, with the increasing demand for convenience and flexibility of household products, a variety of storage rack products that are easy to assemble and disassemble have appeared on the market. These products usually use quick connection structures to simplify the assembly process, but most of the connection structures still have certain limitations, for example: there are many parts, it is difficult for users to distinguish different parts during installation, resulting in difficult assembly. Not only that, many users report that even if they spend a lot of time, they often cannot successfully complete the assembly due to improper assembly, which is one of the biggest pain points for customers in the market for this type of product. Most importantly, the structure used by related products on the market has insufficient connection strength at the connection part, which is prone to shaking, loosening and other problems, seriously affecting the stability and service life of the storage rack. The connection strength is not high enough, and it is easy to loosen after a long time of use, affecting the stability of the storage rack; the connecting piece is easily exposed, not only affecting the aesthetics, but also possibly causing safety hazards. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application proposes a rotary locking connecting device that can simplify the assembly process and enhance the connection strength, and uses an embedded design to hide in the internal structure of the connected object, thereby improving the aesthetics of the product.

[0005] The present application also proposes a storage rack with the above rotary locking connecting device.

[0006] According to the rotary locking connecting device of the first aspect of the present application, the rotary locking connecting device comprises:

[0007] a rotating piece;

[0008] The first clamping piece is rotatably installed at one end of the rotating piece, and an end of the first clamping piece is provided with a first mounting portion in a concave-convex structure;

[0009] The second clamping piece is rotatably installed at the other end of the rotating piece and is provided with a second mounting portion in a convex-concave structure, and the first mounting portion and the second mounting portion are correspondingly clamped.

[0010] The first clamping piece and the second clamping piece can be inserted and locked in opposite directions through the first mounting portion and the second mounting portion.

[0011] The rotating locking connection device according to the embodiment of the application has at least the following beneficial effects: the simple and fast assembly mode is realized by setting the structure of the rotating piece and the first clamping piece and the second clamping piece, the user's confusion in the installation process is reduced, and the installation process is more convenient; the concave-convex structures of the first mounting portion and the second mounting portion are matched with each other, the stability and the carrying capacity of the connection part are ensured through the insertion and locking mode in opposite directions, and the connection strength is improved; the mutual clamping structure of the first clamping piece and the second clamping piece is designed, the problem of unattractive appearance caused by the exposed connecting piece is avoided, and the overall appearance of the product is improved; the first clamping piece and the second clamping piece are precisely connected through the corresponding concave-convex structures, the stability of the connection part is improved, and the overall structure is more solid and durable; the design of the rotating piece enables the first clamping piece and the second clamping piece to be adjusted in multiple directions, and the flexibility and adaptability of the connection device are enhanced; the new design is different from the traditional connection mode with a large size fixed by welding in the market, and does not use the traditional connection mode of fixing and connecting the position with movable elastic pieces, which is not reliable. The new design has the revolutionary feature that it can realize the folding function of 0-360 degree rotation of the connection position to save the size of the packaging body, and has the locking connection position, enhances the fastening degree of the connection position, and is more convenient and simple for the customer to install the process; all the connecting pieces in the market are designed in an exposed mode or produced by welding, and the present application adopts an embedded design and is hidden in the connecting piece, which truly realizes the smooth and beautiful appearance.

[0012] According to some embodiments of the present application, the first mounting part is provided with a first sliding groove, the second mounting part is provided with a second sliding groove, the rotating part is provided with a first rotating shaft and a second rotating shaft, the first rotating shaft is slidably mounted in the first sliding groove, and the second rotating shaft is slidably mounted in the second sliding groove. By providing the first sliding groove and the second sliding groove, and matching the first rotating shaft and the second rotating shaft, the first clamping part and the second clamping part can slide and overlap on the rotating part, and finally the first clamping part and the second clamping part can be stacked into a plate-shaped structure, greatly reducing the volume, facilitating transportation and storage, and the first clamping part and the second clamping part can move freely in multiple directions, enhancing the flexibility of the connecting device and adapting to more different application scenarios.

[0013] According to some embodiments of the present application, the rotating part is provided with an extension at one end, and the second rotating shaft is arranged in the extension, and the extension is adapted to limit the rotation angle of the first clamping part and the second clamping part. The rotating part enables the connecting device to realize multi-angle adjustment in a limited space, improves the space utilization efficiency, and the design of the extension not only improves the overall stability of the connecting device, but also further enhances the supporting force of the second rotating shaft, ensuring the stability of the connecting part.

[0014] According to some embodiments of the present application, the first clamping part and the second clamping part are cavity structures with one end open, and the first clamping part and the second clamping part are inserted and locked in opposition to form a mounting cavity, and the rotating part is arranged in the mounting cavity. The rotating part can be effectively wrapped, thereby enhancing the structural stability of the connecting part, and the cavity structure design can hide the rotating part, avoiding the problem of exposed connecting parts and improving the overall appearance of the product.

[0015] According to some embodiments of the present application, the rotating part is one of a single-axis rotating part or a multi-axis rotating part. Different axis numbers of the rotating part design can meet the requirements of rotation angle and direction in different application scenarios, improve the application range of the connecting device, and the multi-axis rotating part design can provide more support points, thereby improving the stability of the connecting device.

[0016] According to some embodiments of the present application, the first clamping part comprises a first protrusion and a first inner recess, the second clamping part comprises a second protrusion and a second inner recess, the first protrusion is clamped in the second inner recess, the second protrusion is clamped in the first inner recess, the first protrusion and the second protrusion are respectively provided with a locking structure, and the locking structure is used to fix the first clamping part and the second clamping part to each other. The locking structure on the first protrusion and the second protrusion ensures the firm fixation between the first clamping part and the second clamping part, enhances the stability of the connecting device, and the interlocking structure ensures the reliability and durability of the connecting device during use.

[0017] According to some embodiments of the present application, the locking structure is one of a cantilever structure, a ring-shaped buckle structure, a torsion buckle structure, a wave bead screw structure or a buckle locking structure. By adopting different types of locking structures, the exposed connecting pieces are avoided, and the overall aesthetics of the product is improved. Different types of locking structures provide a reliable locking mechanism, ensuring the reliability and durability of the connecting device during use.

[0018] According to some embodiments of the present application, the first clamping piece is provided with a first clamping portion away from the side wall of the first mounting portion, and the second clamping piece is provided with a second clamping portion away from the side wall of the second mounting portion. The first clamping portion is adapted to clamp the first clamping piece to the pipe rack, and the second clamping portion is adapted to clamp the second clamping piece to the pipe rack. By providing the first clamping portion and the second clamping portion, the reliable connection between the connecting device and the pipe rack is ensured, and the unstable factors caused by loosening are reduced. The design of the clamping portion allows the connecting device to closely fit the pipe rack, reducing the occupied space and improving the space utilization.

[0019] According to some embodiments of the present application, the edges of the first mounting portion and the second mounting portion are provided with a circular arc transition structure. The circular arc transition structure makes it easier to align and clamp the first mounting portion and the second mounting portion, simplifies the assembly process and improves the assembly efficiency. The circular arc transition structure can disperse stress and reduce stress concentration, thereby improving the structural strength and durability of the connecting device.

[0020] According to the second aspect of the present application, the shelf comprises a plurality of pipe racks connected in sequence by the rotating locking connecting device of the first aspect.

[0021] According to the shelf of the present application, at least the following beneficial effects are achieved: by adopting the rotating locking connecting device of the present application, the plurality of pipe racks can be quickly and simply connected together, simplifying the assembly process and improving the assembly efficiency; the structural design of the rotating locking connecting device ensures the firm connection between the pipe racks, improving the overall stability of the shelf; the rotating locking connecting device of the present application can adapt to different connection requirements, so that the shape and size of the shelf can be adjusted according to actual needs, enhancing flexibility; by hiding the connecting pieces, the exposed connecting pieces are avoided, improving the overall aesthetics of the product; by the efficient connection method, a compact structural layout can be achieved, improving the space utilization; the shelf adopts a detachable connection method, which is convenient for disassembly and reassembly, facilitating transportation and storage.

[0022] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0023] The application will be further described below in conjunction with the accompanying drawings and embodiments, in which:

[0024] Fig. 1 is a schematic view of the rotary locking connecting device in a locked state according to an embodiment of the application;

[0025] Fig. 2 is a schematic view of the rotary locking connecting device in an open state according to an embodiment of the application;

[0026] Fig. 3 is a schematic view of the rotary locking connecting device in an unfolded state according to an embodiment of the application;

[0027] Fig. 4 is a schematic view of a first clamping member and a second clamping member according to an embodiment of the application;

[0028] Fig. 5 is a schematic view of a rotary member according to an embodiment of the application;

[0029] Fig. 6 is a schematic view of the rotary locking connecting device mounted on a pipe rack according to an embodiment of the application.

[0030] Fig. 1 is a schematic view of the rotary locking connecting device in a locked state according to an embodiment of the application; DETAILED DESCRIPTION

[0031] Embodiments of the application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the application, and cannot be understood as a limitation of the application.

[0032] In the description of the application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the purpose of facilitating the description of the application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0033] In the description of the application, the meaning of several is one or more, the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If the first, second is described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0034] In the description of the application, unless otherwise explicitly defined, the words such as setting, installing, connecting, etc. should be understood in a broad sense, and the person skilled in the art can reasonably determine the specific meaning of the above words in the application in combination with the specific content of the technical solution. In the description of the application, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the application. In the description of the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner. In the description of the present application, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the application. In the description of the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0035] With reference to FIGS. 1-6, a rotary locking connection device comprises:

[0036] a rotating member 110;

[0037] a first clamping member 100, which is rotatably installed at one end of the rotating member 110, and the end of the first clamping member 100 is provided with a first mounting portion 130, which is a concave-convex structure;

[0038] a second clamping member 120, which is rotatably installed at the other end of the rotating member 110, and is provided with a second mounting portion 140, which is provided with a convex-concave structure, and the first mounting portion 130 and the second mounting portion 140 correspondingly clamp;

[0039] Among them, the first clamping member 100 and the second clamping member 120 can be inserted and locked in opposite directions through the first mounting portion 130 and the second mounting portion 140.

[0040] By setting the structure of the rotating piece 110 and the first clamping piece 100 and the second clamping piece 120, a simple and fast assembly method is realized, the user's confusion in the installation process is reduced, and the installation process is more convenient; the concave-convex structures of the first mounting part 130 and the second mounting part 140 match each other, the stability and carrying capacity of the connection part are ensured through the opposite insertion and locking mode, thereby improving the connection strength; by designing the mutual clamping structure of the first clamping piece 100 and the second clamping piece 120, the problem of unsightly caused by exposed connecting pieces is avoided, and the overall appearance of the product is improved; the first clamping piece 100 and the second clamping piece 120 are precisely connected through the corresponding concave-convex structures, the stability of the connection part is improved, and the overall structure is more solid and durable; the design of the rotating piece 110 enables the first clamping piece 100 and the second clamping piece 120 to be adjusted in multiple directions, enhancing the flexibility and adaptability of the connecting device.

[0041] Referring to FIG. 4, the first mounting part 130 is provided with a first sliding groove 150, the second mounting part 140 is provided with a second sliding groove 160, the rotating piece 110 is provided with a first rotating shaft 180 and a second rotating shaft 190, the first rotating shaft 180 is slidably installed in the first sliding groove 150, and the second rotating shaft 190 is slidably installed in the second sliding groove 160. By setting the first sliding groove 150 and the second sliding groove 160, and the first rotating shaft 180 and the second rotating shaft 190 matched therewith, the first clamping piece 100 and the second clamping piece 120 can be slid and overlapped on the rotating piece 110, and finally the first clamping piece 100 and the second clamping piece 120 can be stacked into a plate-shaped structure, greatly reducing the volume, facilitating transportation and storage, and the first clamping piece 100 and the second clamping piece 120 are freely movable in multiple directions, enhancing the flexibility of the connecting device and adapting to more different application scenarios.

[0042] Referring to FIG. 5, the rotating piece 110 is provided with an extension part 170 at one end, the second rotating shaft 190 is arranged in the extension part 170, and the extension part 170 is suitable for limiting the rotation angle of the first clamping piece 100 and the second clamping piece 120. It can be understood that the rotating piece 110 as a whole can be designed in an "L" shape, the rotating piece 110 enables the connecting device to realize multi-angle adjustment in a limited space, improving the space utilization efficiency, the "L" shape design not only improves the overall stability of the connecting device, but also further enhances the supporting force of the second rotating shaft 190 through the design of the extension part 170, ensuring the stability of the connection part. The design of the extension part 170 increases the radius of rotation of the second clamping piece 120, so that the rotation amplitude is larger, thereby facilitating the stacking of the first clamping piece 100 and the second clamping piece 120, facilitating transportation and storage. The "L" shaped rotating piece 110 improves the flexibility and application range of the first clamping piece 100 and the second clamping piece 120.

[0043] Referring to FIG. 4, the first clamping piece 100 and the second clamping piece 120 are cavity structures with one end open. After the first clamping piece 100 and the second clamping piece 120 are inserted and locked in opposition, an installation cavity is formed, and the rotating piece 110 is arranged in the installation cavity. The rotating piece 110 can be effectively wrapped, thereby enhancing the structural stability of the connection part. The cavity structure design can hide the rotating piece 110, avoiding the problem of exposed connecting pieces and improving the overall aesthetic appearance of the product.

[0044] Referring to FIG. 5, the rotating piece 110 is a single-axis rotating piece or a multi-axis rotating piece. The multi-axis rotating piece can be one of a double-axis rotating piece, a three-axis rotating piece, or a four-axis rotating piece. Rotating pieces 110 with different numbers of axes can meet the requirements of rotation angle and direction in different application scenarios, thereby improving the application range of the connecting device. The multi-axis rotating piece 110 design can provide more support points, thereby improving the stability of the connecting device. The multi-axis rotating piece 110 design makes the connecting device more reliable during use, reducing potential instability factors caused by single-axis rotation.

[0045] The first clamping piece 100 includes a first protrusion and a first inner recess, and the second clamping piece 120 includes a second protrusion and a second inner recess. The first protrusion is clamped in the second inner recess, and the second protrusion is clamped in the first inner recess. The first protrusion and the second protrusion are respectively provided with a locking structure 200, and the locking structure 200 is used to fix the first clamping piece 100 and the second clamping piece 120 to each other. The locking structure 200 on the first protrusion and the second protrusion ensures the firm fixation between the first clamping piece 100 and the second clamping piece 120, thereby enhancing the stability of the connecting device. The interlocking structure locking mechanism ensures the reliability and durability of the connecting device during use.

[0046] The locking structure 200 is one of a cantilever structure, a ring buckle structure, a torsion buckle structure, a wave bead screw structure, or a buckle locking structure. By adopting different types of locking structures 200, the connecting pieces are avoided from being exposed, thereby improving the overall aesthetic appearance of the product. Different types of locking structures 200 provide a reliable locking mechanism, thereby ensuring the reliability and durability of the connecting device during use.

[0047] The first clamping piece 100 is provided with a first clamping portion 210 on the side wall away from the first mounting portion 130, and the second clamping piece 120 is provided with a second clamping portion 220 on the side wall away from the second mounting portion 140. The first clamping portion 210 is suitable for clamping the first clamping piece 100 to the pipe rack, and the second clamping portion 220 is suitable for clamping the second clamping piece 120 to the pipe rack. By providing the first clamping portion 210 and the second clamping portion 220, the reliable connection between the connecting device and the pipe rack is ensured, and the unstable factors caused by looseness are reduced. The design of the clamping portion makes the connecting device closely fit the pipe rack, reduces the occupied space, and improves the space utilization. It can be understood that the first clamping portion 210 and the second clamping portion 220 can be provided as circular arc notches, and the pipe rack is provided with a fixing portion matched with the circular arc notch at the end of the pipe rack, so as to clamp the first clamping portion 210 and the second clamping portion 220 at the fixing portion of the pipe rack.

[0048] It can be understood that the first clamping piece 100 and the second clamping piece 120 can be made of metal material. When the first clamping piece 100 and the second clamping piece 120 are made of metal material, the first clamping piece 100 and the second clamping piece 120 can be connected by impact welding when they are installed on the pipe rack. The first clamping piece 100 and the second clamping piece 120 can also be made of nylon or plastic material. When the first clamping piece 100 and the second clamping piece 120 are installed, an adhesive such as glue can be applied to the side wall of the first clamping piece 100 and the second clamping piece 120, so as to ensure the stable installation between the first clamping piece 100 and the second clamping piece 120 and the pipe rack. This design can reduce the welding, thereby reducing the labor intensity of workers and improving the efficiency. The edges of the first mounting portion 130 and the second mounting portion 140 are provided with a circular arc transition structure. The circular arc transition structure makes the first mounting portion 130 and the second mounting portion 140 easier to align and clamp, simplifies the assembly process, improves the assembly efficiency, and disperses stress, reduces stress concentration, thereby improving the structural strength and durability of the connecting device.

[0049] According to the second aspect of the embodiment of the present application, the shelf comprises a plurality of pipe racks connected in sequence by the rotating locking connecting device of the first aspect.

[0050] According to the shelf provided by the embodiment of the present application, the following beneficial effects are achieved: the plurality of pipe racks can be quickly and simply connected together by using the rotating locking connecting device, the assembling process is simplified, and the assembling efficiency is improved; the structure design of the rotating locking connecting device ensures the firm connection between the pipe racks, and the overall stability of the shelf is improved; the rotating locking connecting device can adapt to different connection requirements, so that the shelf can adjust the shape and size according to actual needs, and the flexibility is enhanced; through the design of the hidden connecting piece, the overall appearance of the product is improved; through the efficient connection mode, a compact structure layout can be realized, and the space utilization rate is improved; the shelf is convenient for disassembly and reassembly due to the detachable connection mode, and transportation and storage are facilitated.

[0051] In the first aspect embodiment, referring to FIG. 1, the first clamping piece 100 and the second clamping piece 120 are in a locked state, at this time, the first mounting part 130 of the first clamping piece 100 and the second mounting part 140 of the second clamping piece 120 are clamped with each other, and are kept fixed through the locking structure 200 such as a cantilever structure, a wave bead screw structure or a buckle locking structure. When the user needs to separate the first clamping piece 100 and the second clamping piece 120, the locking structure 200 needs to be released first, and the first clamping piece 100 and the second clamping piece 120 are separated by force, at this time, the locking structure 200 is released, and the first clamping piece 100 and the second clamping piece 120 can be separated from each other, and the separated first clamping piece 100 and the second clamping piece 120 are shown in FIG. 2, at this time, the first clamping piece 100 and the second clamping piece 120 can rotate around the rotating piece 110, the user can continue to rotate the first clamping piece 100 and the second clamping piece 120 until they can be stacked together to form a flat plate structure, which greatly reduces the occupied space and facilitates transportation and storage. The first clamping piece 100 and the second clamping piece 120 in the stacked state can refer to the state shown in FIG. 3.

[0052] It can be understood that one end of the first clamping piece 100 is used for locking with the second clamping piece 120, and the other end is used for fixing with the pipe rack; similarly, one end of the second clamping piece 120 is used for locking with the first clamping piece 100, and the other end is used for fixing with another pipe rack. By connecting a plurality of pipe racks in sequence by using the first clamping piece 100 and the second clamping piece 120, a continuous long pipe can be formed. This design makes the pipe rack can be folded up by the connecting device during logistics transportation, thereby greatly saving the transportation space; the user can easily unfold and use after receiving the goods.

[0053] The pipe frame is a metal piece with open ends, which can be cylindrical, square, oval or egg-shaped. In order to match the shape of the pipe frame, the external contour of the first clamping piece 100 and the second clamping piece 120 can be modified according to the specific shape of the pipe frame, as long as the first clamping piece 100 and the second clamping piece 120 can be smoothly loaded into the pipe frame. It can be understood that the pipe frame can also be a wooden product, which is designed to be hollow at both ends, facilitating the installation of the first clamping piece 100 and the second clamping piece 120. In some embodiments, the pipe frame can also be a plastic piece, which can be selected according to different material and design requirements.

[0054] Referring to FIG. 1, the first clamping piece 100 and the second clamping piece 120 are in a locked state. When the user needs to separate the first clamping piece 100 and the second clamping piece 120, he only needs to apply force to separate the two clamping pieces. The separated clamping pieces are shown in FIG. 2. At this time, the first clamping piece 100 and the second clamping piece 120 can rotate around the rotating piece 110. After the first clamping piece 100 and the second clamping piece 120 rotate by a certain angle, they can be stacked together to form a flat structure, thereby greatly reducing the cost of logistics transportation.

[0055] Referring to FIG. 6, in the embodiment of the second aspect, the pipe frame and the rotating locking connection device are applied to a storage rack. During logistics transportation, the long pipe frame in the storage rack is connected by the rotating locking connection device. The pipe frame can be folded for transportation. After receiving the goods, the user can directly use it without the need for additional tools for assembly, and the installation process is simple, thereby improving the user's satisfaction.

[0056] The above describes the embodiments of the present application in combination with the drawings, but the present application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present application.

Claims

1. A rotary locking connection device, characterized in that The utility model relates to a kind of rotating locking connection device of pipe frame, including: Rotary piece; First clamping piece, one end of the rotary piece is rotatably installed, and the end of the first clamping piece is provided with first mounting portion, and the first mounting portion is concave-convex structure; Second clamping piece, the other end of the rotary piece is rotatably installed, and provided with second mounting portion, and the second mounting portion is provided with convex-concave structure, and the first mounting portion and the second mounting portion correspond and are clamped; Wherein, the first clamping piece and the second clamping piece can be realized to be inserted and locked to each other by the first mounting portion and the second mounting portion.

2. A rotary locking connection device according to claim 1, characterized in that The first mounting portion is provided with first sliding slot, the second mounting portion is provided with second sliding slot, the rotary piece is provided with first rotation shaft and second rotation shaft, the first rotation shaft is slidably installed in the first sliding slot, and the second rotation shaft is slidably installed in the second sliding slot.

3. A rotary locking connection device according to claim 2, characterised in that The rotary piece one end is provided with extension, the second rotation shaft is arranged in the extension, and the extension is suitable for limiting the rotation angle of the first clamping piece and the second clamping piece.

4. A rotational locking connection device according to claim 1, characterized in that The first clamping piece and the second clamping piece are cavity structure with one end opening, and the first clamping piece and the second clamping piece are inserted and locked to each other to form mounting cavity, and the rotary piece is arranged in the mounting cavity.

5. A rotational locking connection device according to claim 1, characterized in that The rotary piece is one of single-shaft rotary piece or multi-shaft rotary piece.

6. A rotational locking connection device according to claim 1, characterized in that The first clamping piece includes first protrusion and first inner recess, the second clamping piece includes second protrusion and second inner recess, the first protrusion is clamped in the second inner recess, the second protrusion is clamped in the first inner recess, the first protrusion and the second protrusion are respectively provided with locking structure, and the locking structure is used to fix the first clamping piece and the second clamping piece to each other.

7. A rotary locking connection device according to claim 6, characterised in that The locking structure is one of cantilever structure, ring buckle structure, torsion buckle structure, wave bead screw structure or buckle locking structure.

8. A rotational locking connection device according to claim 1, characterized in that The side wall of the first clamping piece away from the first mounting portion is provided with first clamping portion, the side wall of the second clamping piece away from the second mounting portion is provided with second clamping portion, the first clamping portion is suitable for clamping the first clamping piece in pipe frame, and the second clamping portion is suitable for clamping the second clamping piece in pipe frame.

9. A rotational locking connection device according to claim 1, characterized in that The edge of the first mounting portion and the second mounting portion is provided with circular arc transition structure.

10. A shelving unit comprising a plurality of tubular shelves, characterised in that, Multiple pipe frames are sequentially connected by the rotating locking connection device of pipe frame as claimed in any one of claims 1-9.

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