Baby stroller with side door

Abstract

A child cart with a side door comprises a cart body. The fixing assembly is at least arranged on one side of the cart body; the rotating assembly is detachably or rotatably connected to the fixing assembly, and the rotating assembly has two states: when the rotating assembly is in the first state, the rotating assembly is stored in the stroller body, and an opening for a child to go in and out is formed in one side of the stroller body; and when the rotating assembly is in the second state, the rotating assembly is matched with the fixing assembly and used for shielding the opening and providing supporting force for the cart body. According to the embodiment of the invention, the rotating assembly forms the lateral opening in the storage state to facilitate entering and exiting of a child, and cooperates with the fixing assembly to provide supporting force in the unfolding state, so that the problem of contradiction between insufficient lateral supporting and operation convenience of an existing side-open type cart is solved, and the side-open type cart has the advantages of improving the structural stability and simplifying the operation process.

Description

Technical Field

[0001] The present invention relates to the technical field of child strollers, and in particular to a child stroller with a side-opening door. Background Art

[0002] There are a variety of strollers on the market today, broadly categorized by opening method: top-loading, front-folding, and side-opening. To balance load-bearing strength with lightweight, foldable strollers generally utilize an aluminum alloy tubular frame, with the chassis and uprights forming the primary load channel.

[0003] However, most existing side-opening strollers adopt the solution of folding the side rails as a whole or completely removing them. One end of the side rails is connected to the frame by a plastic clip or a latch, which forms a side entrance when opened. This design has a simple structure, but the side rails do not participate in load-bearing. When the vehicle collides sideways or goes up and down stairs, it must rely on the chassis and front and rear columns for reinforcement. The main frame pipes often need to be thickened or equipped with steel cables, resulting in increased weight and cost. Another type of stroller designs the side walls as load-bearing brackets, forming a triangle with the base and top beam to enhance lateral rigidity. However, due to the closed sides, the doors cannot be opened. Children can only be carried in from the top or front. Parents find it difficult to operate in narrow scenes and are prone to bumping into the canopy. In summary, how to achieve a safe, convenient and foldable side-opening door structure while maintaining lateral load-bearing rigidity remains a technical pain point that the industry urgently needs to solve. Summary of the Invention

[0004] The object of the present invention is to provide a side-door stroller with the advantages of improving lateral support, optimizing the convenience of children getting in and out, and keeping the stroller lightweight.

[0005] The technical solution is as follows: A child stroller with a side-opening door, comprising: Cart body; A fixing assembly is provided at least on one side of the cart body; A rotating assembly that is detachably or rotatably connected to the fixed assembly, wherein the rotating assembly has two states: When in the first state, the rotating assembly is stored in the stroller body, and an opening for a child to enter and exit is formed on one side of the stroller body; When in the second state, the rotating assembly cooperates with the fixing assembly to cover the opening and provide support for the cart body.

[0006] Furthermore, the rotating assembly rotates toward the outside of the cart body relative to the fixed assembly.

[0007] Furthermore, the rotating assembly includes a first connecting rod and a connecting assembly, one end of the two first connecting rods are rotatably connected, there are two connecting assemblies, and the other ends of the two first connecting rods are detachably or rotatably connected to the fixed assembly through the connecting assembly.

[0008] Furthermore, the fixing assembly includes a second connecting rod, a third connecting rod and two fourth connecting rods, one end of the second connecting rod is rotatably connected to one end of the third connecting rod, and the second connecting rod and the third connecting rod are provided with through holes, one of the fourth connecting rods is hinged to the second connecting rod through the through hole, and the other fourth connecting rod is hinged to the third connecting rod through the through hole.

[0009] Furthermore, the connecting assembly includes a pivot and a pivot seat, the pivot is provided with a first groove, the first connecting rod part is provided in the first groove, the pivot seat is provided with a second groove, and the fourth connecting rod part is provided in the second groove.

[0010] Furthermore, a connecting portion is provided between the pivot and the pivot seat, and the connecting portion includes a fixed end connected to the pivot, and a first hinged end rotatably connected to the pivot seat, the first hinged end being used to rotate the pivot shaft relative to the pivot seat within a predetermined angular range, wherein: When the rotating assembly is in the second state, the first connecting rod and the corresponding fourth connecting rod are arranged side by side along the lateral direction of the cart body to form the opening.

[0011] Furthermore, a first connecting hole is provided on the pivot, and the pivot is connected to the first connecting rod through the first connecting hole. A second connecting hole is also provided on the pivot seat, and the second connecting hole is arranged opposite to the through hole. The pivot is hinged to the fourth connecting rod through the second connecting hole.

[0012] Furthermore, a locking groove is provided on the pivot seat, and a clamping portion is provided on the pivot shaft. The clamping portion includes a sliding groove, an operating end for external pressing or pulling, and a sliding rod axially extending from the operating end and passing through the sliding groove, wherein the clamping portion has two states: When in the unlocked state, the slide bar moves along the slide groove toward the operating end, so that the slide bar is disengaged from the locking groove; When in the locked state, the slide bar moves along the slide groove away from the operating end, so that at least a portion of the slide bar is embedded in the locking groove.

[0013] Furthermore, a positioning end is provided on the side of the slide rod away from the operating end, and a slope is formed on the periphery of the positioning end for cooperating with the locking groove. The slope cooperates with the edge of the locking groove to guide the slide rod into the locking groove when the rotating assembly is reset from the unlocked state to the locked state.

[0014] Furthermore, the clamping part also includes a fixing part, and a limiting groove is axially opened on the outer periphery of the sliding rod, and fixing holes corresponding to the limiting groove are respectively opened on the opposite side walls of the sliding groove. The fixing part is passed through the fixing hole and partially extends into the limiting groove to limit the axial movement stroke of the sliding rod.

[0015] The embodiment of the present invention forms a lateral opening in the stowed state through a rotating component to facilitate children's entry and exit, and cooperates with the fixed component to provide support force in the unfolded state, thereby solving the problem of insufficient lateral support and contradiction between operational convenience of existing side-opening strollers, and has the advantages of improving structural stability and simplifying the operating process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 is a structural diagram of an embodiment of the present invention when in a second state; Figure 2 is a schematic structural diagram of an embodiment of the present invention in a first state; Figure 3 It is a schematic structural diagram of a fixed assembly and a rotating assembly according to an embodiment of the present invention; Figure 4 Schematic diagram of the structure of the second connecting rod and the third connecting rod; Figure 5 is an exploded schematic diagram of a connection assembly according to an embodiment of the present invention; Figure 6 is a cross-sectional view of a connection assembly according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the working state of the connection component according to an embodiment of the present invention; Figure 8 It is a structural schematic diagram of a portion of the cart body according to an embodiment of the present invention; Figure 9 The invention relates to a rotary connection assembly according to an embodiment of the present invention.

[0018] Reference numerals: 1. Cart body; 11. Connecting seat; 12. Connector; 121. Protrusion; 122. Second hinge end; 2. Fixed assembly; 21. Second connecting rod; 22. Third connecting rod; 23. Through hole; 24. Fourth connecting rod; 3. Rotating assembly; 31. First connecting rod; 32. Connecting assembly; 321, first groove; 322, first connecting hole; 323, sliding groove; 324, operating end; 325, slide bar; 3251, positioning end; 3252, inclined surface; 3253, limiting groove; 326, fixing hole; 327, fixing member; 328, second groove; 329, second connecting hole; 330, locking groove; 331, connecting portion; 3311, fixed end; 3312, first hinged end; 4. Speak. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below with reference to the accompanying drawings.

[0020] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention. In the existing technology, the contradiction between lateral load-bearing and convenient door opening has long existed in the field of child strollers. Traditional side-opening strollers use a design that uses side rails that fold up as a whole or completely disassemble. The side rails only serve as a containment structure and cannot participate in load-bearing. This leads to insufficient lateral rigidity of the vehicle, requiring additional reinforcement of the main frame pipes or the addition of steel cables, which increases weight and cost. Other strollers with lateral support functions can form a stable triangular structure, but the sides are completely closed. Parents need to carry their children from the top or front, which is difficult to operate in a small space and is prone to collision with the stroller body.

[0022] To address this issue, researchers discovered that the disconnect between the lateral opening structure and its load-bearing function was the root cause of the conflict. Analyzing the force path of the stroller frame, they discovered that the lack of lateral support resulted in additional loads on the chassis and columns. This led them to propose designing the siderails as convertible structural members, forming an entrance when open and providing stable support with the frame when closed. Further research revealed that a rotary connection mechanism could enable the siderails to switch between stowed and extended positions, simultaneously meeting both the opening and force transmission requirements.

[0023] Therefore, refer to Figures 1-9 This application discloses a side-opening child stroller comprising a stroller body 1, a fixed assembly 2, and a rotating assembly 3. The fixed assembly 2 is disposed on at least one side of the stroller body 1, and the rotating assembly 3 is detachably or rotatably connected to the fixed assembly 2. The rotating assembly 3 has two states: in the first state, it is retracted within the stroller body 1, forming an opening 4 for child access; in the second state, it cooperates with the fixed assembly 2 to block the opening 4 and provide support for the stroller body 1.

[0024] The stroller body 1 is the main frame structure that supports the child. It can be formed by welding or riveting aluminum alloy pipes, and is used to create the seat space and connect the various functional components. The fixed component 2 is a connecting bracket installed on one or both sides of the stroller body. It can be a combination of metal connecting rods and hinges. It provides a mounting base and motion trajectory constraints for the rotating component 3. The rotating component 3 is a repositionable siderail structure. When stored, it releases lateral space and when deployed, it forms a closed enclosure.

[0025] In practice, when a child needs to be carried in the stroller, the rotating assembly 3 rotates outward to a stowed position, creating an unobstructed lateral opening 4, allowing the parent to move the child into the stroller. After the child is seated, the rotating assembly 3 rotates back to a closed position, where its distal end mechanically interlocks with the fixed assembly 2. The rods of the rotating assembly 3 and the frame now form a quadrilateral support structure, transferring lateral loads to the chassis and roof beams. This structure maintains the functionality of the lateral opening 4 while making the rotating assembly 3 an integral part of the frame's load-bearing system, eliminating the need for separate reinforcement of the main frame.

[0026] Compared to existing technologies, traditional siderails serve only as movable enclosures, and their opening and closing processes do not change the mechanical transmission path of the frame. However, this solution makes the rotating assembly 3 a key component of the frame's lateral support when closed. In existing technologies, the siderails completely detach from the frame when opened, resulting in a sudden drop in lateral stiffness. However, this solution ensures effective load transmission in both states through the continuous connection between the fixed assembly 2 and the rotating assembly 3. Existing side-opening structures require an additional locking device to prevent accidental opening, while the mechanical interlocking structure of this solution automatically locks while providing support.

[0027] Through the above technical solution, this application makes the rotating assembly 3 an integral part of the vehicle frame's load-bearing system while maintaining the convenience of the lateral opening 4, avoiding the need for thickening the tubing or auxiliary reinforcement structures due to insufficient lateral rigidity. The coordinated design of the rotating assembly 3 and the fixed assembly 2 not only enables single-handed opening and closing, but also ensures the vehicle's lateral impact resistance in the closed state. This structure maintains a compact form when folded and provides a stable support when unfolded, resolving the issues of single functionality and redundant structure found in traditional solutions.

[0028] It should be noted that, in order to improve the adaptability of the structure and the flexibility of user operation, the rotating assembly 3 in the present application not only supports rotation around the fixed assembly 2, but also can be disassembled as a whole through structural design. In a specific embodiment, the rotating assembly 3 is connected to the fixed assembly 2 through a pivot, and the pivot can adopt a screw connection, a snap-on or a latch structure, so that the rotating assembly 3 can be quickly released and removed from the fixed assembly 2 when not in operation. For example, when the cart needs to be stored for a long time, placed in a small space, or the side rails need to be cleaned or replaced separately, the user can manually disassemble the rotating assembly 3 to further compress the body size or reduce the weight. The disassembly process does not require special tools, and disassembly and assembly can be achieved simply by loosening the quick-release parts or releasing the snap-on mechanism.

[0029] In one embodiment, the present application further proposes that the rotating assembly 3 rotates outward from the cart body 1 relative to the fixed assembly 2. The rotation axis of the rotating assembly 3 can be positioned at the outer edge of the fixed assembly 2, allowing the rotating assembly 3 to extend outward when deployed. The fixed assembly 2 can be implemented as a frame structure formed by a multi-link hinge, with the connection point between the rotating assembly 3 and the fixed assembly 3 positioned at the side edge of the cart body 1 to form a stable force transmission path.

[0030] In practice, when the rotating assembly 3 rotates outward about the hinge point of the fixed assembly 2 and expands, an angle is formed between the rotating assembly 3 and the fixed assembly 2. In the closed state, this angle disappears, forming a flat support surface. On the side of the stroller body 1, the opening 4 formed by the outward rotation of the rotating assembly 3 is larger than when it is rotated inward, making it easier for children to enter and exit. In the closed state, the outward rotation trajectory of the rotating assembly 3 allows it to completely align with the contact surface of the fixed assembly 2, forming a lateral support structure that distributes lateral loads on the stroller body 1 under bumpy road conditions.

[0031] Compared to existing side-opening strollers, existing solutions typically require the rotating assembly 3 to fold inward or completely disassemble. This results in the rotating assembly 3 being unable to form an effective support surface with the frame when closed, and the lateral load is entirely borne by the chassis and columns. This solution, however, uses an outward-rotating trajectory design to create a continuous support surface with the fixed assembly 2 when closed, distributing lateral forces to the connection point between the rotating assembly 3 and the fixed assembly 2, reducing the load requirements of the main frame.

[0032] Through the above technical solution, the present application solves the problem that the side rails of the existing side-opening carts cannot participate in load-bearing, resulting in redundancy of the main frame structure. The rotating component 3 forms a lateral support surface together with the fixed component 2 in the closed state, so that the cart body 1 can maintain the function of the lateral opening 4 while achieving a balance between lightweight and structural strength without increasing the lateral stiffness by thickening the main frame pipe or adding steel cables.

[0033] In one embodiment, referring to Figure 3 This application further proposes that the rotating component 3 includes a first connecting rod 31 and a connecting component 32. One end of the two first connecting rods 31 is rotatably connected. There are two connecting components 32. The other ends of the two first connecting rods 31 are detachably or rotatably connected to the fixed component 2 through the connecting components 32.

[0034] The first connecting rod 31 is a rod-shaped component having a rotating connection end, which can be made of aluminum alloy pipe or carbon fiber composite material. The foldable structure is formed by the rotating connection, which is convenient for reducing the volume when stored.

[0035] The connecting component 32 refers to a component used to achieve a detachable or rotatable connection, which can be specifically achieved by a structure in which a pivot and a pivot seat cooperate, and fixation and release are completed by snapping or sliding to ensure that the rotating component 3 remains stable in the unfolded state.

[0036] Specifically, one end of the two first connecting rods 31 is connected to each other via a rotating shaft, and the other end is connected to the fixed assembly 2 via a connecting assembly 32. When the lateral opening 4 is to be formed, the first connecting rods 31 rotate outward around the rotation center of the connecting assembly 32, causing the two first connecting rods 31 to unfold and retract into one side of the stroller body 1, thus forming an opening 4 for the child to enter and exit. When the opening 4 is to be closed, the first connecting rods 31 rotate in the opposite direction to a position that mates with the fixed assembly 2. The connecting assembly 32 secures the first connecting rods 31 via a snap-fit ​​or locking mechanism, allowing the rotating assembly 3 to provide lateral support for the stroller body 1.

[0037] Compared to existing side-opening strollers, which typically employ foldable or completely detachable side rails, these rails are connected solely by buckles or latches and are unable to support weight. This solution, through the cooperation of the first connecting rod 31 and the connecting assembly 32, enables the rotating assembly 3 and the fixed assembly 2 to form a stable support structure in the closed state, distributing lateral forces and avoiding excessive reliance on thickened tubing or additional steel cables for the main frame.

[0038] Through the above technical solution, this application maintains the convenience of the side opening 4 while utilizing the linkage structure of the rotating component 3 and the fixed component 2 to enhance the lateral load-bearing capacity, thereby solving the problem that the side rails of traditional side-opening carts cannot bear weight, resulting in a bulky main frame. At the same time, the folding and storage function is realized through a detachable or rotating connection design, taking into account both lightweight and structural strength.

[0039] In one embodiment, referring to Figure 3-Figure 4 The fixing assembly 2 includes a second connecting rod 21, a third connecting rod 22 and two fourth connecting rods 24. One end of the second connecting rod 21 is rotatably connected to one end of the third connecting rod 22. A through hole 23 is provided on the second connecting rod 21 and the third connecting rod 22. One fourth connecting rod 24 is hinged to the second connecting rod 21 through the through hole 23, and the other fourth connecting rod 24 is hinged to the third connecting rod 22 through the through hole 23.

[0040] Among them, the second connecting rod 21 and the third connecting rod 22 refer to rigid rods that constitute the basic support of the fixed assembly 2. Specifically, they can be implemented by aluminum alloy pipes. The two are connected by rotation to form a foldable frame structure, which is used to provide stable lateral support in the unfolded state. The through hole 23 refers to a hole structure that runs through the second connecting rod 21 and the third connecting rod 22. Specifically, it can be formed by a stamping or drilling process. The hinged connection between the through hole 23 and the fourth connecting rod 24 enables the fourth connecting rod 24 to rotate around the axis of the through hole 23, thereby realizing the folding and unfolding of the fixed assembly 2. The fourth connecting rod 24 refers to an auxiliary support rod connected to the second connecting rod 21 and the third connecting rod 22. Specifically, it can be implemented by a steel hinge structure. It is hinged to the through hole 23 to transmit lateral loads in the unfolded state and reduce the overall volume in the folded state.

[0041] Specifically, the second and third links 21, 22 are pivotally connected to form a foldable V-shaped base frame. Two fourth links 24 are hingedly connected to the through-holes 23 of the second and third links 21, 22, respectively. When the stroller is in the unfolded state, the second and third links 21, 22 are arranged at an angle, and the fourth links 24 extend outward and connect to the rotating assembly 3, forming a stable triangular support structure that enhances the stroller's lateral rigidity. When folding, the second and third links 21, 22 rotate inward about their connection points, driving the fourth links 24 to simultaneously retract toward the stroller body 1, reducing space usage.

[0042] While realizing the function of the side opening 4, this embodiment utilizes a multi-link hinge structure to form a stable lateral support, solving the problem that the existing stroller side rails cannot take into account both load-bearing and folding. In addition, during the folding process, each link can be retracted synchronously, and the operational convenience is significantly improved.

[0043] In one embodiment, referring to Figure 5-Figure 6This application further proposes that the connecting component 32 includes a pivot and a pivot seat, the pivot is provided with a first groove 321, the first connecting rod 31 is partially provided in the first groove 321, the pivot seat is provided with a second groove 328, and the fourth connecting rod 24 is partially provided in the second groove 328.

[0044] The pivot refers to the shaft-like component connecting the rotating assembly 3 and the fixed assembly 2. Specifically, it can be implemented as a metal shaft with grooves. The opening 4 of the first groove 321 is parallel to the axis of the pivot and is used to accommodate the end of the first connecting rod 31. The pivot seat refers to the mounting base that cooperates with the fixed assembly 2. Specifically, it can be implemented as a metal block with grooves. The opening 4 of the second groove 328 is perpendicular to the axis of the pivot seat and is used to accommodate the end of the fourth connecting rod 24. The mating structure of the first groove 321 and the second groove 328 forms a multi-directional limit, constraining the displacement freedom of the connecting rod when the rotating assembly 3 is deployed and maintaining its compactness when folded.

[0045] Specifically, the pivot, via a first groove 321, wraps around the end of the first link 31, providing stable axial support for the rotating assembly 3 in the deployed state. The pivot, via a second groove 328, wraps around the end of the fourth link 24, maintaining lateral restraint in the folded state for the fixed assembly 2. When the rotating assembly 3 is in the first state, the staggered arrangement of the first groove 321 and the second groove 328 allows the first link 31 and the fourth link 24 to separate, forming a lateral opening 4. When the rotating assembly 3 is in the second state, the axes of the first groove 321 and the second groove 328 coincide, forming a coplanar support structure for the first link 31 and the fourth link 24.

[0046] This embodiment solves the problem of insufficient load-bearing capacity of the side rail connection structure of a side-opening stroller. While maintaining the function of the side opening 4, the rotating component 3 and the fixed component 2 form a rigid connection, thereby improving the lateral impact resistance of the stroller without affecting the convenience of folding and storing.

[0047] In one embodiment, referring to Figure 5-Figure 6 The present application further proposes that a connecting portion 331 is provided between the pivot and the pivot seat, and the connecting portion 331 includes a fixed end 3311 connected to the pivot, and a first hinged end 3312 rotatably connected to the pivot seat, and the first hinged end 3312 is used to enable the pivot to rotate within a predetermined angle range relative to the pivot seat. When the rotating assembly 3 is in the second state, the first connecting rod 31 and its corresponding fourth connecting rod 24 are arranged side by side along the side of the cart body 1 to form the opening 4.

[0048] The connecting portion 331 is a connecting structure used to guide rotation during the deployment of the rotating assembly 3. Specifically, it can be formed from a metal connecting rod or an integrally molded reinforced plastic component. The fixed end 3311 can be secured to the pivot end via screws or rivets to ensure that it does not undergo axial or rotational displacement under load. The first hinged end 3312 is connected to the pivot seat via a hinge pin, enabling controlled rotation relative to the pivot seat. This connection method allows for precise positioning of the rotating assembly 3 at a predetermined angle during its rotation from the stowed state to the deployed state, and forms a stable structural stop.

[0049] Specifically, during the rotation of the rotating assembly 3 from the first state to the second state, the connecting portion 331 guides the pivot to rotate in a plane, thereby driving the first connecting rod 31 to unfold downward along a predetermined trajectory and gradually approach the corresponding fourth connecting rod 24. When the rotating assembly 3 reaches the fully unfolded position, the first connecting rod 31 and the fourth connecting rod 24 are arranged parallel to the lateral direction of the cart body 1, forming a double-rod structure arranged side by side in the front-to-back direction, achieving structural closure and force coordination. Because the connecting portion 331 constitutes an intermediate rotation unit between the pivot and the pivot seat, it can effectively avoid trajectory deviation or interference problems during the unfolding of the rotating assembly 3, improving the smoothness of the unfolding action and the accuracy of the structural positioning.

[0050] This embodiment optimizes the force path of the deployed rotating assembly 3 through the design of the connecting portion 331. Each first link 31 forms a parallel support with its corresponding fourth link 24, further enhancing the overall lateral compression and torsional resistance of the siderail. Furthermore, this design allows the deployed rotating assembly 3 to become part of the frame structure without increasing the size or weight of the stroller. This effectively combines the functions of the opening 4 with the support function, avoiding the problems of the prior art where the structure becomes loose or unloadable after the door is opened.

[0051] In one embodiment, referring to Figure 5-Figure 6 The present application further proposes that a first connecting hole 322 is provided on the pivot, and the pivot is connected to the first connecting rod 31 through the first connecting hole 322. A second connecting hole 329 is also provided on the pivot seat, and the second connecting hole 329 is arranged opposite to the through hole 23. The pivot is hinged to the fourth connecting rod 24 through the second connecting hole 329.

[0052] The first connecting hole 322 is a through-hole structure provided on the pivot, which can be achieved by drilling the surface of a metal shaft, and is used to form a detachable or rotatable shaft hole at the end of the first connecting rod 31. The second connecting hole 329 is a positioning hole provided on the pivot seat, which can be formed by injection molding or stamping. Its axis coincides with the axis of the through-hole 23 of the fourth connecting rod 24, so that the pivot can simultaneously pass through the second connecting hole 329 and the through-hole 23 to achieve an articulated connection. The through-hole 23 is a through-hole provided at the end of the fourth connecting rod 24, which can be formed by cutting a pipe and then performing secondary processing, and is used to accommodate the pivot and define its rotation trajectory.

[0053] Specifically, the pivot is fixedly connected to the first link 31 through the first connecting hole 322, so that the rotation of the first link 31 can be transmitted to the pivot. After the second connecting hole 329 on the pivot seat is aligned with the through hole 23 of the fourth link 24, the pivot passes through the second connecting hole 329 and the through hole 23 in sequence to form a hinged structure between the pivot and the fourth link 24. When the rotating assembly 3 is in the second state, the hinge point between the pivot and the fourth link 24 bears the lateral load of the cart, while the connection structure between the first link 31 and the pivot transfers the load to the fixed assembly 2, forming a stable triangular support. When the rotating assembly 3 switches to the first state, the pivot moves axially along the through hole 23, so that the hinge point between the first link 31 and the fourth link 24 is unlocked, thereby realizing the folding and storage of the rotating assembly 3.

[0054] This embodiment achieves a stable hinged connection between the rotating assembly 3 and the fixed assembly 2, maintaining the stroller's lateral rigidity when the side rails are open and avoiding localized stress concentration caused by a single-point connection. Furthermore, the mating structure of the pivot and through-hole 23 automatically unlocks during folding, simplifying the operation and enhancing the ease of use of the side door mechanism.

[0055] In one embodiment, referring to Figure 5-Figure 6 The present application further proposes that a locking groove 330 is provided on the pivot seat, and a clamping portion is provided on the pivot, the clamping portion including a sliding groove 323, an operating end 324 for external pressing or pulling, and a sliding rod 325 axially extending from the operating end 324 and passing through the sliding groove 323, wherein the clamping portion has two states: when in an unlocked state, the sliding rod 325 moves along the sliding groove 323 toward the operating end 324, so that the sliding rod 325 disengages from the locking groove 330; when in a locked state, the sliding rod 325 moves along the sliding groove 323 away from the operating end 324, so that at least part of the sliding rod 325 is embedded in the locking groove 330.

[0056] Among them, the locking groove 330 refers to a groove structure provided on the pivot seat, which can be specifically implemented by stamping or milling, and is used to accommodate the end of the slide rod 325 in the locked state to limit its axial displacement. The clamping part refers to a linkage mechanism composed of the operating end 324, the slide rod 325 and the sliding groove 323, which can be specifically implemented by metal stamping parts and springs. The sliding rod 325 is driven to move in the sliding groove 323 by the pulling or pressing action of the operating end 324 to achieve the switching between the locked and unlocked states. The sliding groove 323 refers to a guide groove provided on the pivot, which can be specifically implemented by wire cutting or milling, and is used to constrain the moving path of the slide rod 325 to ensure that it slides in a predetermined direction. The operating end 324 refers to a protrusion 121 or a recessed structure for manual operation by the user, which can be specifically implemented by injection molding or metal stamping parts to facilitate the application of external force of pulling or pressing. The unlocked state refers to the state in which the slide bar 325 is completely disengaged from the locking slot 330. At this point, the rotating assembly 3 can freely rotate about the pivot axis, and a spring return mechanism can be used to assist in rapid unlocking. The locked state refers to the state in which the slide bar 325 is partially embedded in the locking slot 330. At this point, the rotating assembly 3 and the fixed assembly 2 form a rigid connection. Specifically, self-locking is achieved by the cooperation of the inclined surface 3252 at the end of the slide bar 325 and the edge of the locking slot 330.

[0057] Specifically, refer to Figure 7 To unlock, the operating end 324 is pulled or pressed, driving the slide bar 325 to move along the sliding groove 323 toward the operating end 324 until the slide bar 325 is completely free of the locking groove 330. At this point, the rotating assembly 3 can be pivoted and unfolded or folded. To lock, the slide bar 325 is moved along the sliding groove 323 away from the operating end 324 under the action of a spring or gravity. The end of the slide bar 325 is inserted into the locking groove 330. The contact between the inclined surface 3252 and the edge of the locking groove 330 generates a self-locking force, preventing the rotating assembly 3 from rotating accidentally.

[0058] This embodiment achieves rapid locking and unlocking between the rotating assembly 3 and the fixed assembly 2, simplifying operation while ensuring lateral support strength. For example, a parent can open and close the side rails with a single hand. Furthermore, when the stroller is subjected to a lateral impact, the rigid contact between the slide bar 325 and the locking groove 330 effectively distributes the load, preventing deformation at the joint due to stress concentration.

[0059] The present application further proposes that a positioning end 3251 is provided on the side of the slide rod 325 away from the operating end 324, and a slope 3252 is formed on the periphery of the positioning end 3251 for cooperating with the locking groove 330. The slope 3252 cooperates with the edge of the locking groove 330 to guide the slide rod 325 into the locking groove 330 when the rotating component 3 is reset from the unlocked state to the locked state.

[0060] The positioning end 3251 refers to the protrusion 121 structure provided at the end of the slide bar 325 to limit the displacement of the slide bar 325. Specifically, it can be implemented as a conical or wedge-shaped geometry, with its outer contour forming a contact surface with the edge of the locking groove 330. The inclined surface 3252 refers to the inclined surface extending outward from the base of the positioning end 3251. Specifically, it can be implemented at an angle of 15-55°. The sliding contact between the inclined surface 3252 and the edge of the locking groove 330 creates a guiding effect. The edge of the locking groove 330 refers to the edges on both sides of the groove defined in the pivot seat. Specifically, it can be implemented as a chamfered or arc-shaped transition structure, which forms a sliding fit with the inclined surface 3252.

[0061] Preferably, the inclination angle of the inclined surface 3252 is 45°.

[0062] In practice, when the rotating assembly 3 needs to be restored from the unlocked state to the locked state, the operator releases the external force applied to the operating end 324. The slide bar 325, under the action of the return spring or gravity, then moves along the sliding groove 323 toward the locking groove 330. The inclined surface 3252 of the positioning end 3251 first contacts the edge of the locking groove 330. Guided by the inclined surface 3252, the slide bar 325 undergoes a lateral displacement correction, automatically aligning the axis of the slide bar 325 with the centerline of the locking groove 330. As the slide bar 325 continues to move, the positioning end 3251 fully enters the locking groove 330. The contact pressure between the inclined surface 3252 and the edge of the locking groove 330 disappears, and the slide bar 325, under the action of the axial force, embeds itself into the bottom of the locking groove 330, completing the automatic restoration of the locked state.

[0063] Through the above technical solution, the present application achieves an automatic reset function when the rotating assembly 3 is locked, effectively preventing locking failure caused by misalignment of the slide bar 325 and improving the efficiency of side rail closing. The guiding mechanism of the inclined surface 3252 maintains a stable fit between the slide bar 325 and the locking groove 330 under dynamic loads, ensuring that the lateral support rigidity of the stroller is not affected by the unlocking operation, while also reducing component wear during repeated opening and closing.

[0064] In one embodiment, the present application further proposes that a reset member is provided in the sliding groove 323, and the reset member is used to automatically push the sliding rod 325 back to the locking direction after the external force is released from the operating end 324, so that the positioning end 3251 of the sliding rod 325 is embedded in the locking groove 330 again, thereby completing the automatic reset of the clamping part.

[0065] Among them, the reset member is preferably a compression spring arranged between the sliding groove 323 and the sliding rod 325, one end of which abuts against the inner wall or end limit structure of the sliding groove 323, and the other end abuts against the limit shoulder or tail end of the sliding rod 325. It can be compressed when the sliding rod 325 is in an unlocked state, and provide axial reset force after the external force is released, so that the sliding rod 325 moves along the sliding groove 323 toward the locking groove 330 and completes re-locking.

[0066] With this arrangement, the slide bar 325 automatically returns to the locked state under the elastic force of the reset element, eliminating the need for manual reset after each unlocking operation. This ensures that the rotating assembly 3 is securely fixed to the stroller body 1 during the closing process, preventing locking failure caused by an abnormal position of the slide bar 325. The reset element has a simple structure, is easy to assemble, and has excellent fatigue durability and recovery stability. It is suitable for the frequent opening and closing of strollers in daily use, effectively improving overall ease of use and structural safety.

[0067] In one embodiment, referring to Figure 8 The present application further proposes that the cart body 1 also includes a connecting seat 11 and a connector 12, the connector 12 includes a protrusion 121 and a second hinged end 122, the protrusion 121 is connected to an end of the fourth link 24 away from the second link 21 or the third link 22, and the second hinged end 122 is rotatably connected to the connecting seat 11.

[0068] The connector 12 is a structural unit that enables the rotatable connection between the fourth connecting rod 24 and the bottom of the cart body 1. Specifically, it can be formed by stamping a metal plate or injection molding a high-strength plastic structure. One end of the connector forms a protrusion 121 that mates with the end of the fourth connecting rod 24. The protrusion 121 can be fixedly connected to the fourth connecting rod 24 through a slot, screw connection, or riveting method to ensure stability during load transfer. The other end of the connector 12 forms a second hinge end 122, which is hinged to the connecting base 11 via a hinge pin, allowing the fourth connecting rod 24 to rotate in the vertical direction around the connecting base 11.

[0069] Specifically, during the unfolding of the cart, when the rotating assembly 3 rotates to the second state, the fourth connecting rod 24 drives the entire body to flip through the protrusion 121 of the connector 12 and the second hinge end 122, and stays at a preset angle position under the constraint of the limiting structure of the connecting seat 11, forming a side-by-side arrangement with the first connecting rod 31 to form a stable supporting structure; and when the cart is folded or the rotating assembly 3 is stored, the fourth connecting rod 24 can be folded around the second hinge end 122 relative to the connecting seat 11, thereby reducing the overall volume and improving the compactness of the cart.

[0070] Through this structural design, connector 12 not only ensures a reliable connection and flexible rotation between fourth link 24 and the stroller body, but also, through its end protrusion 121, securely secures the link, enhancing the stability and load-bearing capacity of the structure during use. Combined with the structural arrangement of connector base 11, this allows for smooth transitions between the rotational assembly 3 during opening and closing, creating a three-dimensional support path during use, improving the overall structural strength and ease of use of the side-door stroller.

[0071] In one embodiment, referring to Figure 9 The present application further proposes that the two first connecting rods 31 and their corresponding two fourth connecting rods 24 are movably connected via symmetrically arranged rotational connection structures, thereby forming a symmetrical and parallel support configuration when the rotating assembly 3 switches from the first state to the second state. The end of each first connecting rod 31 and the end of its corresponding fourth connecting rod 24 are rotationally connected via a coaxial pin provided on the connecting assembly 32. The pin is inserted into the docking holes on the first connecting rod 31 and the fourth connecting rod 24, so that they remain relatively fixed in the axial direction and can rotate in the radial direction. Preferably, the docking holes can be provided with nylon bushings or limit washers to reduce metal-to-metal friction and ensure smooth rotation and wear resistance.

[0072] In one embodiment, the present application further proposes that the clamping portion also includes a fixing member 327, and a limiting groove 3253 is axially opened on the outer periphery of the sliding rod 325, and the two opposite side walls of the sliding groove 323 are respectively provided with fixing holes 326 corresponding to the limiting groove 3253, and the fixing member 327 is passed through the fixing hole 326 and partially extends into the limiting groove 3253 to limit the axial movement stroke of the sliding rod 325.

[0073] The outer periphery of the sliding rod 325 is provided with a limiting groove 3253 along the axial direction. The limiting groove 3253 can be a recessed annular groove or a strip-shaped groove structure, which is used to form a position-limiting fit with the fixing member 327. The sliding groove 323 is a groove structure provided on the connecting component 32 or the guide component, which is used to guide the sliding rod 325 to slide axially therein. Preferably, through holes, i.e., fixing holes 326, are provided on the opposite side walls of the sliding groove 323, and the axial direction of the fixing holes 326 is perpendicular to the sliding direction. The fixing member 327 is inserted into the opposite fixing holes 326 and partially extends into the limiting groove 3253 on the sliding rod 325. Due to this structural arrangement, when the sliding rod 325 slides axially in the sliding groove 323, the fixing member 327 is restricted in sliding within the limiting groove 3253, thereby limiting the travel of the sliding rod 325. The length of the limiting groove 3253 determines the effective movable distance of the sliding rod 325, thereby preventing it from sliding out or entering an abnormal position due to external force, ensuring the safety and reliability of the structural movement.

[0074] The embodiment sets the cooperation structure of the fixing member 327 and the limiting groove 3253, effectively controls the sliding range on the basis of ensuring the sliding function, avoids the problems of loosening or over-limit travel of the sliding rod 325, and improves the stability and durability of the structure. The structure is especially suitable for the movable parts of the child stroller products, and meets the dual requirements of safety and controllability.

[0075] The above is only used to illustrate the technical solutions of the present application, not limit, other modifications or equivalent replacements of the technical solutions of the present application made by those skilled in the art should be covered in the scope of claims of the present application, as long as they do not depart from the spirit and scope of the technical solutions of the present application.

Claims

1. A side-door stroller, characterized in that: include: Cart body (1); A fixing assembly (2) is provided at least on one side of the cart body (1); A rotating assembly (3) detachably or rotatably connected to the fixed assembly (2), wherein the rotating assembly (3) has two states: When in the first state, the rotating assembly (3) is accommodated in the stroller body (1), and an opening (4) for children to enter and exit is formed on one side of the stroller body (1); When in the second state, the rotating assembly (3) cooperates with the fixing assembly (2) to cover the opening (4) and provide support force for the cart body (1).

2. The side-door stroller according to claim 1, characterized in that: The rotating assembly (3) rotates toward the outside of the cart body (1) relative to the fixed assembly (2).

3. The side-door stroller according to claim 2, characterized in that: The rotating assembly (3) comprises a first connecting rod (31) and a connecting assembly (32), one end of two first connecting rods (31) are rotatably connected, there are two connecting assemblies (32), and the other ends of the two first connecting rods (31) are detachably or rotatably connected to the fixed assembly (2) through the connecting assemblies (32).

4. The side-door stroller according to claim 3, characterized in that: The fixing assembly (2) comprises a second connecting rod (21), a third connecting rod (22) and two fourth connecting rods (24), one end of the second connecting rod (21) is rotatably connected to one end of the third connecting rod (22), the second connecting rod (21) and the third connecting rod (22) are provided with through holes (23), one of the fourth connecting rods (24) is hinged to the second connecting rod (21) through the through hole (23), and the other of the fourth connecting rods (24) is hinged to the third connecting rod (22) through the through hole (23).

5. The side-door stroller according to claim 4, characterized in that: The connecting assembly (32) comprises a pivot and a pivot seat, the pivot is provided with a first groove (321), the first connecting rod (31) is partially disposed in the first groove (321), the pivot seat is provided with a second groove (328), and the fourth connecting rod (24) is partially disposed in the second groove (328).

6. The side-door stroller according to claim 5, characterized in that: A connecting portion (331) is further provided between the pivot and the pivot seat. The connecting portion (331) includes a fixed end (3311) connected to the pivot, and a first hinged end (3312) rotatably connected to the pivot seat, the first hinged end (3312) being used to rotate the pivot shaft within a predetermined angular range relative to the pivot seat, wherein: When the rotating assembly (3) is in the second state, the first connecting rod (31) and the corresponding fourth connecting rod (24) are arranged side by side along the side of the cart body (1) to form the opening (4).

7. The side-door stroller according to claim 5, characterized in that: The pivot is further provided with a first connecting hole (322), and the pivot is connected to the first connecting rod (31) via the first connecting hole (322). The pivot seat is further provided with a second connecting hole (329), and the second connecting hole (329) is arranged opposite to the through hole (23). The pivot is hinged to the fourth connecting rod (24) via the second connecting hole (329).

8. The side-door stroller according to claim 5, characterized in that: The pivot seat is further provided with a locking groove (330), and the pivot shaft is further provided with a clamping portion, the clamping portion comprising a sliding groove (323), an operating end (324) for external pressing or pulling, and a sliding rod (325) axially extending from the operating end (324) and passing through the sliding groove (323), wherein the clamping portion has two states: When in the unlocked state, the slide bar (325) moves along the slide slot (323) toward the operating end (324), so that the slide bar (325) is disengaged from the locking slot (330); When in the locked state, the slide bar (325) moves along the slide slot (323) in a direction away from the operating end (324), so that at least a portion of the slide bar (325) is embedded in the locking slot (330).

9. The side-door stroller according to claim 8, characterized in that: A positioning end (3251) is provided on a side of the slide bar (325) away from the operating end (324), and an inclined surface (3252) for cooperating with the locking groove (330) is formed on the periphery of the positioning end (3251). The inclined surface (3252) cooperates with the edge of the locking groove (330) to guide the slide bar (325) into the locking groove (330) when the rotating assembly (3) is reset from the unlocked state to the locked state.

10. The side-door stroller according to claim 5, characterized in that: The clamping portion also includes a fixing member (327), and a limiting groove (3253) is axially provided on the outer periphery of the sliding rod (325), and fixing holes (326) corresponding to the limiting groove (3253) are respectively provided on the opposite side walls of the sliding groove (323). The fixing member (327) is passed through the fixing hole (326) and partially extends into the limiting groove (3253) to limit the axial movement stroke of the sliding rod (325).

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