Dual-arm rotary connecting structure and dual-purpose cart with variable basket space

Abstract

The utility model discloses a two -purpose cart of two -arm rotary connection structure and its menu basket space variable. The two -arm rotary connection structure includes first connecting piece and second connecting piece, and one side of first connecting piece is equipped with first rotation end, and second connecting piece is equipped with the second rotation end of rotation connection with first rotation end, and the pivot is equipped between first rotation end and second rotation end, and one side of first rotation end is equipped with the first rotation piece of being able to rotate a certain angle around pivot, and one side of second rotation end is equipped with the second rotation piece of being able to move along pivot axial activity but rotation is limited, and first rotation piece and second rotation piece one -way rotation cooperation, when first connecting piece positive rotation, drive first rotation piece and rotate and push second rotation piece and displace along pivot axial to unlock first connecting piece reverse rotation, until second rotation piece resets and recovers lock, through setting the two -arm rotary connection structure of being able to rotate, and limiting, the flexible rotation of both sides structure and space conversion are convenient for realizing.

Description

Technical Field

[0001] This utility model relates to the field of hand-push vehicle technology, and in particular to a dual-purpose cart with a double-arm rotating connection structure and a variable basket space. Background Technology

[0002] The built-in basket on the stroller provides convenience for daily use. While providing the function of a baby seat, it can also accommodate common items such as baby backpacks and portable high chairs. The process of taking out and putting in items is natural and smooth, and cleaning and maintenance are also easy. The surface material is stain-resistant and easy to wipe clean after daily use.

[0003] However, the fixed opening design also presents significant limitations. Because the opening size is fixed, users often face difficulties when loading larger items. For example, when needing to put in bulky items such as strollers or large shopping bags, because the opening cannot be adjusted, users must repeatedly adjust the angle of the items or apply extra pressure to stuff them into the basket. This not only increases the difficulty of use and reduces overall convenience, but may also damage items due to forced compression, such as deformed stroller frames or broken shopping bag handles, thus affecting the user experience and the safety of the items. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model proposes a dual-purpose trolley with a double-arm rotating connection structure and a variable basket space.

[0005] This utility model is achieved by the following technical solution: A double-arm rotary connection structure includes a first connector and a second connector. The first connector has a first rotating end on one side, and the second connector has a second rotating end that is rotatably connected to the first rotating end. A rotating shaft is provided between the first rotating end and the second rotating end. A first rotating component that can rotate around the rotating shaft at a certain angle is provided on one side of the first rotating end, and a second rotating component that can move along the axial direction of the rotating shaft but whose rotation is restricted is provided on one side of the second rotating end. The first rotating component and the second rotating component are unidirectionally rotated together. When the first connector rotates in the forward direction, it drives the first rotating component to rotate and push the second rotating component to move along the axial direction of the rotating shaft to unlock the first connector and rotate in the reverse direction until the second rotating component resets and the locking is restored.

[0006] The double-arm rotating connection structure, which can rotate and limit, facilitates flexible rotation and spatial transformation of the two sides. When the double-arm rotating connection structure is applied to the basket of the cart, the first rotating part that can rotate is connected to the basket handle. By rotating the handle, the spatial position of the basket handle can be adjusted, thereby realizing the spatial transformation inside the basket.

[0007] As described above, in the double-arm rotary connection structure, the second rotating component includes an annular second tooth body and ratchet-shaped mating teeth arranged circumferentially on its annular surface, and the first rotating component includes an annular first tooth body and driving teeth arranged circumferentially thereon. The tooth shape of the driving teeth is adapted to the profile of the inter-tooth groove formed by two adjacent mating teeth, forming a unidirectional rotary mating structure.

[0008] As described above, in the double-arm rotating connection structure, two limiting grooves are symmetrically provided on the inner ring of the first tooth body, and a mounting cylinder for mounting the rotating shaft is provided on the first rotating end. The mounting cylinder is symmetrically provided with limiting blocks that can slide in the limiting groove. When the limiting block rotates and abuts against one side wall of the limiting groove under the drive of the first rotating end, the first rotating end can drive the first rotating component to rotate.

[0009] As described above, in the double-arm rotating connection structure, the outer circumferential array of the second tooth body is provided with ratchet-shaped auxiliary teeth with a tooth height lower than that of the mating teeth. The first rotating end is correspondingly provided with an auxiliary ring with the rotating shaft as the rotation center. The circumferential array on the auxiliary ring is provided with a matching tooth whose tooth shape precisely matches the tooth groove profile formed by the two adjacent auxiliary teeth. The tooth tip of the matching tooth is flush with the driving tooth and the tooth height of the matching tooth is lower than that of the driving tooth.

[0010] As described above, in the double-arm rotating connection structure, the outer circumference of the second tooth body is provided with multiple movable grooves, the inner side of the second rotating end is provided with a mounting protrusion that nests and cooperates with the movable grooves, and a reset member is provided between the second rotating end and the second tooth body, which can axially push and pull the second rotating part to move back to the original position along the axis of rotation when subjected to force and expansion.

[0011] As described above, in the double-arm rotating connection structure, the reset component is an elastic spring that pushes and pulls the second rotating component axially along the axis of rotation when subjected to force for extension and retraction.

[0012] As described above, in the double-arm rotary connection structure, the surface of the drive tooth is provided with a locking groove that forms a locking structure with the tooth tip of the mating tooth.

[0013] As described above, in the double-arm rotary connection structure, the other side of the first connector is provided with a first connecting arm that is connected to the first rotating end, and the other side of the second connector is provided with a second connecting arm that is connected to the second rotating end.

[0014] A dual-purpose trolley with variable basket space includes a body body and a basket body mounted on the body body, and a seat body mounted on the body body. The basket body includes a mounting tube connected to the body body and a U-shaped handle on one side of the mounting tube. The mounting tube and the U-shaped handle are connected by a double-arm rotating connection structure as described above. Both sides of the U-shaped handle are connected to a first connector, and the mounting tube is connected to a second connector.

[0015] The basket features a double-arm rotating connection structure that allows for flexible space transformation. The mounting tube and U-shaped handle are connected by a first connector and a second connector. By operating the U-shaped handle, the opening angle of the basket handle can be adjusted in one direction to accommodate different storage needs. Combined with the one-way locking function of the first and second rotating parts, the structure is ensured to be stable and free from shaking after adjustment, avoiding the risk of loosening. This enhances the convenience, safety, and space utilization of the stroller, meets the needs of multiple scenarios, and optimizes the user experience.

[0016] As described above, in the dual-purpose trolley with variable basket space, the U-shaped handle can adjust the opening angle of the basket through the double-arm rotating connection structure. When the U-shaped handle is rotated upward to the correct position, the space inside the basket body increases, and / or when the U-shaped handle is rotated downward to the correct position, the opening of the basket body increases. The side of the U-shaped handle away from the mounting tube is adjacent to the axle of the dual-purpose trolley with variable basket space.

[0017] Compared with the prior art, the dual-purpose trolley with a double-arm rotating connection structure and variable basket space proposed in this utility model has the following beneficial effects: 1. The double-arm rotating connection structure of this utility model, by setting a double-arm rotating connection structure that can rotate and limit, facilitates the flexible rotation and spatial transformation of the two sides of the structure. When the double-arm rotating connection structure is applied to the vegetable basket of the cart, the first rotating part that can rotate is connected to the side of the vegetable basket handle. By operating the rotation of the handle, the spatial position of the vegetable basket handle can be adjusted, thereby realizing the spatial transformation inside the vegetable basket. 2. The double-arm rotating connection structure of this utility model, by setting a unidirectional rotating engagement structure of ratchet-shaped mating teeth and driving teeth, allows users to smoothly adjust the opening angle of the basket in one direction to adapt to items of different sizes. At the same time, the tooth shape of the mating teeth and driving teeth ensures that the structure is stable and does not wobble after adjustment. This solves the problem of inconvenient adjustment of traditional basket fixing structures and significantly improves the convenience, stability and safety of the application of this structure. 3. The dual-purpose stroller with variable basket space of this utility model realizes flexible transformation of the basket space through the double-arm rotating connection structure. The mounting tube and the U-shaped handle are rotatably connected by the first connector and the second connector. By operating the U-shaped handle, the unfolding angle of the basket handle can be adjusted in one direction to adapt to different storage needs. With the one-way locking function of the first and second rotating parts, it is ensured that the structure is stable and does not wobble after adjustment, avoiding the risk of loosening. It improves the convenience, safety and space utilization of the stroller, meets the needs of multiple scenarios and optimizes the user experience. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a schematic diagram of the double-arm rotary connection structure of this utility model; Figure 2 for Figure 1 Another perspective structural diagram; Figure 3 The double-arm rotating connection structure of this utility model is in Figure 2 A schematic diagram of the explosion decomposition from a specific perspective; Figure 4 The double-arm rotating connection structure of this utility model is in Figure 1 A schematic diagram of the explosion decomposition from a specific perspective; Figure 5 This is an exploded view of the second connecting member, the second rotating member, and the resetting member of the double-arm rotary connection structure of this utility model; Figure 6 This is a schematic diagram of the first rotating component of the double-arm rotary connection structure of this utility model from one perspective. Figure 7 for Figure 6 A structural diagram from another perspective; Figure 8 This is a schematic diagram of the structure of the first connecting member of the double-arm rotary connection structure of this utility model; Figure 9 This is a schematic diagram of a connector and a first rotating component in the double-arm rotary connection structure of this utility model. Figure 10 This is a schematic diagram of the structure of the dual-purpose trolley with variable basket space according to the present invention. Figure 11 for Figure 10 Another perspective structural diagram; Figure 12 for Figure 11 Enlarged schematic diagram of region A; Figure 13 This is a schematic diagram of the structure of the dual-purpose trolley with variable basket space according to the present invention after the basket space is changed.

[0020] The corresponding reference numerals in the attached figures are as follows: 1. First connecting member; 11. First rotating end; 111. Mounting cylinder; 1111. Limiting block; 112. Auxiliary ring; 1121. Alignment tooth; 12. First connecting arm; 121. First mounting hole; 2. Second connecting member; 21. Second rotating end; 211. Mounting protrusion; 22. Second connecting arm; 221. Second mounting hole; 3. Rotating shaft; 4. First rotating member; 41. First tooth body; 411. Limiting groove; 42. Drive tooth; 421. Locking groove; 5. Second rotating member; 51. Second tooth body; 511. Movable groove; 52. Mating tooth; 53. Auxiliary tooth; 6. Reset member; 7. Body body; 8. Vegetable basket body; 81. Mounting tube; 82. U-shaped handle; 9. Seat body. Detailed Implementation

[0021] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] Specific embodiments, combined with Figures 1 to 13 As shown, the technical solution of this utility model is further explained. Overall, in conjunction with... Figures 1 to 9 As shown, the double-arm rotating connection structure includes a first connector 1 and a second connector 2. The first connector 1 has a first rotating end 11 on one side, and the second connector 2 has a second rotating end 21 that is rotatably connected to the first rotating end 11. A rotating shaft 3 is provided between the first rotating end 11 and the second rotating end 21. The first rotating end 11 has a first rotating member 4 that can rotate around the rotating shaft 3 at a certain angle on one side, and the second rotating end 21 has a second rotating member 5 that can move along the axial direction of the rotating shaft 3 but is restricted in rotation on one side. The first rotating member 4 and the second rotating member 5 are unidirectionally rotated together. When the first connector 1 rotates in the forward direction, it drives the first rotating member 4 to rotate and push the second rotating member 5 to move along the axial direction of the rotating shaft 3 to unlock the first connector 1 and rotate in the reverse direction until the second rotating member 5 is reset and the locking is restored.

[0023] Based on the overall design concept described above, a rotatable and limit-positioning double-arm rotating connection structure is designed to facilitate flexible rotation and spatial transformation of the two side structures. For example, when this double-arm rotating connection structure is applied to the basket of a stroller, the rotatable first rotating component 4 is connected to one side of the basket handle. By rotating the handle, the spatial position of the basket handle can be adjusted, thereby realizing the spatial transformation inside the basket. Specifically, the first connecting component 1 and the second connecting component 2 are rotatably connected via a pivot 3. Combined with the unidirectional rotation mechanism of the first rotating component 4 and the second rotating component 5, when the first connecting component 1 is rotated forward, the first rotating component 4 pushes the second rotating component 5 to move axially along the pivot 3, unlocking and rotating it in the opposite direction. After adjusting to the desired basket space, the second rotating component 5 resets and returns to the locked state. This design allows users to easily adjust the basket's unfolding angle in one direction to expand the storage space, such as to accommodate items of different sizes. The reverse rotation locking feature ensures structural stability and prevents loosening after adjustment, effectively solving the problems of traditional fixed basket structures where space is not adjustable and wobbles easily after adjustment, thus improving the convenience and safety of the stroller.

[0024] Specifically, the second rotating component 5 includes an annular second tooth body 51 and ratchet-shaped mating teeth 52 arranged circumferentially on its annular surface. The first rotating component 4 includes an annular first tooth body 41 and driving teeth 42 arranged circumferentially thereon. The tooth shape of the driving teeth 42 is adapted to the profile of the inter-tooth groove formed by two adjacent mating teeth 52, forming a unidirectional rotational mating structure. By setting the unidirectional rotational mating structure of the ratchet-shaped mating teeth 52 and the driving teeth 42, the precision and reliability of the basket space adjustment are achieved.

[0025] Specifically, the annular toothed ratchet array of the second rotating component 5 is designed to match the tooth profile of the driving tooth 42 of the first rotating component 4. During forward rotation, the driving tooth 42 precisely engages with the groove between the adjacent mating teeth 52, pushing the second rotating component 5 to axially displace and unlock for reverse rotation. During reverse rotation, the ratchet teeth's tooth profile creates a self-locking mechanism, effectively preventing loosening after adjustment. This dual-arm rotating structure, combining the rotating shaft 3's rotational connection with axial displacement locking, allows users to smoothly adjust the basket's unfolding angle in one direction to accommodate items of different sizes. Furthermore, the mating teeth 52 and driving teeth 42 ensure a stable and wobbly structure after adjustment, solving the problems of inconvenient adjustment, easy wobbling, and insufficient safety of traditional basket fixing structures. This significantly improves the convenience, stability, and safety of the structure's application.

[0026] To further expand the performance of the double-arm rotating connection structure, preferably, two limiting grooves 411 are symmetrically provided on the inner ring of the first tooth body 41, and a mounting cylinder 111 for mounting the rotating shaft 3 is provided on the first rotating end 11. A limiting block 1111 that can slide in the limiting groove 411 is symmetrically provided on the cylinder body of the mounting cylinder 111. When the limiting block 1111 rotates and abuts against one side wall of the limiting groove 411 under the drive of the first rotating end 11, the first rotating end 11 can drive the first rotating member 4 to rotate.

[0027] The sliding engagement between the limiting groove 411 of the inner ring of the first tooth body 41 and the limiting block 1111 of the mounting cylinder 111 achieves precise limiting of the rotation angle. When the limiting block 1111 abuts against the side wall of the limiting groove 411, the first rotating end 11 can synchronously drive the first rotating member 4 to rotate, ensuring that the tooth profile engagement between the drive tooth 42 and the ratchet tooth is precise and effective. At this time, the first rotating end 11 is unlocked and rotates in the opposite direction. The first rotating end 11 rotates in the opposite direction until the limiting block 1111 abuts against the other side wall of the limiting groove 411, driving the first rotating member 4 to rotate in the opposite direction until the second rotating member 5 is reset and locked. Therefore, the bidirectional rotation locking mechanism ensures that the drive tooth 42 pushes the second rotating member 5 to push axial displacement to unlock during forward rotation, and the ratchet tooth self-locks to prevent loosening during reverse rotation, while the limiting structure avoids structural damage caused by excessive rotation.

[0028] In addition, the outer circumferential array of the second tooth body 51 is provided with ratchet-shaped auxiliary teeth 53 whose tooth height is lower than that of the mating teeth 52. The first rotating end 11 is correspondingly provided with an auxiliary ring 112 with the rotating shaft 3 as the rotation center. The auxiliary ring 112 is provided with a circumferential array of aligning teeth 1121 whose tooth shape precisely matches the tooth groove profile formed by the two adjacent auxiliary teeth 53. The tooth tip of the aligning teeth 1121 is flush with the driving teeth 42 and the tooth height of the aligning teeth 1121 is lower than that of the driving teeth 42, so as to form a dual mating structure of axial limiting and rotational guidance. The tooth profile matching design of the auxiliary tooth 53 and the alignment tooth 1121 further ensures the rotational locking of the first connecting member 1 and the second connecting member 2. The tooth height of the auxiliary tooth 53 is lower than that of the mating tooth 52 to avoid interference during forward rotation. In contrast, the tooth tip of the alignment tooth 1121 is flush with the driving tooth 42, but the tooth height of the alignment tooth 1121 is lower than that of the driving tooth 42. When the driving tooth 42 is precisely embedded in the tooth groove of the mating tooth 52, the alignment tooth 1121 is embedded in the tooth groove of the auxiliary tooth 53, thereby locking the first rotating member 4 and the second rotating member 5. At the same time, it locks the rotation between the first rotating end 11 and the second rotating member 5, which not only prevents axial movement and enhances structural stability, but also ensures that the first rotating member 4 and the second rotating member 5 rotate synchronously and accurately through rotational guidance.

[0029] To further enhance the performance of the double-arm rotary connection structure, preferably, the outer circumference of the second tooth body 51 is provided with multiple movable grooves 511, and the inner side of the second rotating end 21 is provided with mounting protrusions 211 that nest with the movable grooves 511. A reset member 6 is provided between the second rotating end 21 and the second tooth body 51, which can axially push and pull the second rotating member 5 back to its original position along the axis of the rotating shaft 3 when subjected to force and expansion / contraction. Through the nested engagement of the movable grooves 511 and the mounting protrusions 211, the rotation between the second rotating member 5 and the second rotating end 21 is restricted, while allowing the second rotating member 5 to move axially along the rotating shaft 3. The reset member 6, in conjunction with this, achieves the axial limiting and automatic reset functions of the second rotating member 5.

[0030] It should be noted that, based on the overall design concept described above, the technical solution of this application can adopt a variety of different specific implementation structures, forms, or configuration sequences. Among them, the reset element 6 is an elastic spring that axially pushes and pulls the second rotating element 5 back to its original position along the axis of the rotating shaft 3 when subjected to force and extension / retraction.

[0031] In the above configuration of drive tooth 42 and mating tooth 52, preferably, the surface of drive tooth 42 is provided with a locking groove 421 that forms a locking structure with the tooth tip of mating tooth 52, so as to realize the precise locking and positioning of the first rotating member 4 and the second rotating member 5 during unidirectional rotation, and ensure the mechanical limiting function during reverse rotation.

[0032] By setting a locking groove 421 on the surface of the drive tooth 42 to engage with the tooth tip of the mating tooth 52, unidirectional rotational precision locking and reverse mechanical limiting are achieved. That is, when the drive tooth 42 rotates in the forward direction, the second rotating member 5 separates from the first rotating member 4 along the direction of the rotating shaft 3 until the tooth tip of the drive tooth 42 contacts the tooth tip of the mating tooth 52. When the tooth tips of the two contacts, the locking groove 421 temporarily engages with the tooth tip of the mating tooth 52. At this time, when the first rotating end 11 is rotated in the reverse direction, the distance between the first rotating member 4 and the second rotating member 5 remains constant until the first rotating end 11 drives the first rotating member 4 and the drive tooth 42 rotates, causing the mating tooth 52 to disengage from the locking groove 421 until the drive tooth 42 and the mating tooth 52 re-engage. This achieves a stable engagement between the locking groove 421 and the tooth tip during forward rotation, enhancing the locking positioning accuracy and preventing loosening after adjustment.

[0033] To further expand the performance of the double-arm rotating connection structure, preferably, the other side of the first connector 1 is provided with a first connecting arm 12 connected to the first rotating end 11, and the other side of the second connector 2 is provided with a second connecting arm 22 connected to the second rotating end 21. The first connecting arm 12 and the second connecting arm 22 are used to connect the structures on both sides. Optionally, they can be used on a vegetable basket. The first connecting arm 12 and the second connecting arm 22 can serve as key connecting parts of the two side structures of the stroller vegetable basket. The first connecting arm 12 is fixedly connected to one side of the U-shaped vegetable basket handle, and the second connecting arm 22 is fixedly connected to the other side of the vegetable basket, forming a stable double-sided support structure. The spatial shape of the vegetable basket can be easily adjusted by operating the vegetable basket handle to meet the needs of different storage scenarios, which not only improves the convenience of operation but also ensures the stability of the structural connection.

[0034] In this utility model's double-arm rotating connection structure, when the first connecting arm 12 drives the first rotating end 11 to rotate in the forward direction, the limiting block 1111 on the mounting cylinder 111 presses against one side wall of the limiting groove 411 and drives the first rotating member 4 to rotate. Since the first rotating member 4 and the second rotating member 5 are engaged by ratchet teeth, and the second rotating member 5 is located within the second rotating end 21 and can move axially along the rotating shaft 3 but its rotation is restricted, as the first rotating member 4 rotates, the second rotating member 5 moves away from the first rotating member 4 along the rotating shaft 3 until the driving tooth 42 contacts the tooth tip of the mating tooth 52. The tooth tip of the mating tooth 52 falls into the locking groove 421 for temporary locking. When the auxiliary tooth 53 separates from the alignment tooth 1121, the reverse rotation of the first rotating end 11 is unlocked. At this time, the first connecting arm 12 can be operated to drive the second rotating end 21 to rotate in the opposite direction. The limiting block 1111 on the mounting cylinder 111 rotates along the limiting groove 411 until it presses against the other side wall of the limiting groove 411. Continuing to rotate will drive the first rotating member 4 to rotate in the opposite direction, so that the mating tooth 52 disengages from the locking groove 421. The second rotating member 5 approaches the first rotating member 4 along the direction of the rotating shaft 3 until the mating tooth 52 re-meshes with the driving tooth 42 and the alignment tooth 1121 re-meshes with the auxiliary tooth 53, so as to lock the reverse rotation of the first rotating end 11 again.

[0035] In summary, by setting a double-arm rotating connection structure that can rotate and limit, it is easy to realize flexible rotation and spatial transformation of the two sides of the structure. When this double-arm rotating connection structure is applied to the vegetable basket of the cart, the first rotating part 4 that can rotate is connected to one side of the vegetable basket handle. By operating the rotation of the handle, the spatial position of the vegetable basket handle can be adjusted, thereby realizing the spatial transformation inside the vegetable basket.

[0036] A dual-purpose trolley with variable basket space, which, overall, combines... Figures 10 to 13As shown, the stroller includes a main body 7 and a basket body 8 mounted on the main body 7, as well as a seat body 9 mounted on the main body 7. The basket body 8 includes an installation tube 81 connected to the main body 7 and a U-shaped handle 82 located on one side of the installation tube 81. The installation tube 81 and the U-shaped handle 82 are connected by a double-arm rotating connection structure as described above. Both sides of the U-shaped handle 82 are connected to the first connecting member 1, and the installation tube 81 is connected to the second connecting member 2. The double-arm rotating connection structure allows for flexible transformation of the basket space. The installation tube 81 and the U-shaped handle 82 are rotatably connected via the first connecting member 1 and the second connecting member 2. By operating the U-shaped handle 82, the unfolding angle of the basket handle can be adjusted in one direction to adapt to different storage needs. With the one-way locking function of the first rotating member 4 and the second rotating member 5, the structure is ensured to be stable and free from shaking after adjustment, avoiding the risk of loosening, improving the convenience, safety, and space utilization of the stroller, meeting the needs of multiple scenarios, and optimizing the user experience.

[0037] The U-shaped handle 82 allows for adjustment of the basket opening angle via the double-arm rotating connection structure. When the U-shaped handle 82 rotates upwards to its final position, the space inside the basket body 8 increases. When the U-shaped handle 82 rotates downwards to its final position, the opening of the basket body 8 increases. The side of the U-shaped handle 82 furthest from the mounting tube 81 is adjacent to the axle of the convertible trolley with variable basket space. In its initial state, the basket body 8 is in a standard basket configuration. Rotating the U-shaped handle 82 upwards moves it away from the axle of the convertible trolley, increasing the space inside the basket body 8 and unlocking the reverse rotation function of the double-arm rotating connection structure. Rotating the U-shaped handle 82 downwards moves it away from the mounting tube 81, making the opening of the basket body 8 larger. In this configuration, it functions as an open basket, suitable for storing larger items.

[0038] Specifically, the first connector 1 has a first connecting arm 12 connected to the first rotating end 11 on the other side, and the second connector 2 has a second connecting arm 22 connected to the second rotating end 21 on the other side. The first connecting arm 12 has a first mounting hole 121 for fixing the U-shaped handle 82, and the second connecting arm 22 has a second mounting hole 221 for mounting the mounting tube 81.

[0039] It should be noted that, based on the above overall design concept, the technical solution of this application can adopt a variety of different specific implementation structures, forms, or configuration sequences. For example, one side of the first connecting arm 12 is provided with a mounting hole for the U-shaped handle 82. After one side of the U-shaped handle 82 is installed into the mounting hole of the first connecting arm 12, it is then fixed through the first mounting hole 121. One side of the second connecting arm 22 is provided with a mounting hole for connecting with the mounting tube 81. After the mounting tube 81 is installed into the mounting hole of the second connecting arm 22, it is then fixed through the second mounting hole 221.

[0040] The above description is merely a preferred embodiment of this application. Detailed explanations of configurations, examples of specific structural arrangements, and descriptions of assembly and connection methods are provided to ensure sufficient disclosure so that those skilled in the art can better implement this application, and are not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A double-arm rotary connection structure, characterized in that, The device includes a first connector (1) and a second connector (2). The first connector (1) has a first rotating end (11) on one side, and the second connector (2) has a second rotating end (21) that is rotatably connected to the first rotating end (11). A rotating shaft (3) is provided between the first rotating end (11) and the second rotating end (21). The first rotating end (11) has a first rotating component (4) that can rotate around the rotating shaft (3) at a certain angle on one side, and the second rotating end (21) has a second rotating component (5) that can move along the axial direction of the rotating shaft (3) but is restricted in rotation on one side. The first rotating component (4) and the second rotating component (5) are unidirectionally rotated together. When the first connector (1) rotates in the forward direction, it drives the first rotating component (4) to rotate and push the second rotating component (5) to move along the axial direction of the rotating shaft (3) to unlock the first connector (1) to rotate in the reverse direction until the second rotating component (5) is reset and the locking is restored.

2. The double-arm rotary connection structure according to claim 1, characterized in that, The second rotating component (5) includes an annular second tooth body (51) and ratchet-shaped mating teeth (52) arranged in a circular array on its annular surface. The first rotating component (4) includes an annular first tooth body (41) and driving teeth (42) arranged in a circular array thereon. The tooth shape of the driving teeth (42) is adapted to the profile of the inter-tooth groove formed by two adjacent mating teeth (52) to form a unidirectional rotational mating structure.

3. The double-arm rotary connection structure according to claim 2, characterized in that, Two limiting grooves (411) are symmetrically provided on the inner ring of the first tooth body (41). The first rotating end (11) is provided with a mounting cylinder (111) for mounting the rotating shaft (3). The mounting cylinder (111) is symmetrically provided with limiting blocks (1111) that can slide in the limiting groove (411). When the limiting block (1111) rotates and abuts against one side wall of the limiting groove (411) under the drive of the first rotating end (11), the first rotating end (11) can drive the first rotating part (4) to rotate.

4. The double-arm rotary connection structure according to claim 2, characterized in that, The outer circumferential array of the second tooth body (51) is provided with ratchet-shaped auxiliary teeth (53) with a tooth height lower than that of the mating teeth (52). The first rotating end (11) is provided with an auxiliary ring (112) with the rotating shaft (3) as the center of rotation. The auxiliary ring (112) is provided with a circumferential array of matching teeth (1121) whose tooth shape precisely matches the tooth groove profile formed by the two adjacent auxiliary teeth (53). The tooth tip of the matching teeth (1121) is flush with the driving teeth (42) and the tooth height of the matching teeth (1121) is lower than that of the driving teeth (42).

5. The double-arm rotary connection structure according to claim 2, characterized in that, The second tooth body (51) has multiple movable grooves (511) around its outer circumference. The inner side of the second rotating end (21) is provided with a mounting protrusion (211) that is nested and cooperates with the movable groove (511). Between the second rotating end (21) and the second tooth body (51), there is a reset member (6) that can push and pull the second rotating part (5) axially along the axis of the rotating shaft (3) when it is subjected to force and expansion.

6. The double-arm rotary connection structure according to claim 5, characterized in that, The reset component (6) is an elastic spring that pushes and pulls the second rotating component (5) axially along the axis of the rotating shaft (3) when it is stretched or contracted by force.

7. The double-arm rotary connection structure according to claim 2, characterized in that, The surface of the drive tooth (42) is provided with a locking groove (421) that forms a locking structure with the tooth tip of the mating tooth (52).

8. The double-arm rotary connection structure according to any one of claims 1-7, characterized in that, The first connector (1) has a first connecting arm (12) connected to the first rotating end (11) on the other side, and the second connector (2) has a second connecting arm (22) connected to the second rotating end (21) on the other side.

9. A dual-purpose trolley with variable basket space, characterized in that, The vehicle includes a body body (7) and a basket body (8) mounted on the body body (7), and also includes a seat body (9) mounted on the body body (7). The basket body (8) includes an installation tube (81) connected to the body body (7) and a U-shaped handle (82) located on one side of the installation tube (81). The installation tube (81) and the U-shaped handle (82) are connected by a double-arm rotating connection structure as described in any one of claims 1-8. Both sides of the U-shaped handle (82) are connected to the first connecting member (1), and the installation tube (81) is connected to the second connecting member (2).

10. The dual-purpose trolley with variable basket space according to claim 9, characterized in that, The U-shaped handle (82) allows for adjustment of the basket opening angle via the double-arm rotating connection structure. When the U-shaped handle (82) is rotated upwards to its final position, the space inside the basket body (8) increases. And / or when the U-shaped handle (82) is rotated downwards into position, the opening of the main body (8) of the vegetable basket becomes larger, and the side of the U-shaped handle (82) away from the mounting tube (81) is close to the axle of the dual-purpose trolley with variable vegetable basket space.

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