A four-fold stroller

Abstract

The utility model discloses a four -fold baby carriage, including left, right support, each support contains lower push rod, front support, rear support, support connecting rod and first connecting assembly. First connecting assembly is fixed in rear support one end, is equipped with first, second, third pivot, and lower push rod and front support are connected with third pivot respectively, and second pivot. The rear support sliding piece is movably arranged on the rear support, and the front and rear connecting pieces of the support connecting rod are respectively connected with the front support and the rear support sliding piece. The left and right supports are connected through the rear support cross brace assembly, one end of which is connected with the first pivot, and the other end is connected with the rear support sliding piece. The optimization scheme further includes the lower cross brace assembly, the flexible front support connecting piece and the handrail and sunshade assembly connected reasonably. The utility model optimizes the folding hinge and the supporting structure, makes the folding action more smooth and stable, and the storage volume is smaller, and the reliability and the use convenience are improved.

Description

Technical Field

[0001] This utility model relates to the field of baby stroller technology, and in particular to a four-fold baby stroller. Background Technology

[0002] For ease of carrying and storage, strollers with multi-section folding capabilities have become the mainstream in the market. Existing technologies include various stroller solutions capable of four-fold or similar complex folding. These solutions utilize a complex linkage mechanism comprising upper and lower push rods, front and rear supports, multiple sets of linkages, and sliding components to allow the frame to fold collaboratively in both height and width, ultimately achieving a smaller storage volume.

[0003] However, within the basic framework of achieving folding functionality, existing solutions, while pursuing simplified folding steps and minimizing storage volume, often have room for further optimization in terms of structural stability, the smoothness and certainty of the folding action, and the durability of key load-bearing components. For example: Stress concentration at folding hinges: Multiple moving parts are concentrated at a single pivot hinge. Long-term use can easily lead to loosening and wear of the bushing or connector, affecting the folding feel and frame stability.

[0004] Balance between lateral support and folding: The folding mechanism of the lateral support components (such as cross braces) that are responsible for connecting the left and right frames and ensuring the unfolded width may be relatively complex or subject to motion interference, affecting the smoothness of folding or the rigidity after unfolding.

[0005] Integrated storage of auxiliary components: During the folding process of the main frame structure, how to make the armrests, sunshades and other components follow the storage more naturally and neatly, avoiding protrusion or the need for additional operations, is also the key to improving the user experience.

[0006] Therefore, the purpose of this utility model is to provide a solution that optimizes the design of the folding hub structure and the lateral support system based on the existing four-fold stroller technology, so as to improve the structural reliability, smooth operation and overall durability of the product while maintaining excellent folding performance. Utility Model Content

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a technology that improves the structural reliability and smooth operation of the product while maintaining the excellent folding performance of the four-fold bicycle.

[0008] The objective of this utility model is achieved through the following technical solution: A four-fold stroller includes: a left support and a right support. The left and right supports each include a corresponding lower push rod assembly, a front support assembly, a rear support assembly, a support linkage assembly, and a first connecting assembly. The first connecting assembly is fixed to one end of the rear support assembly and has a first pivot, a second pivot, and a third pivot. The lower push rod assembly and the front support assembly are connected to the first connecting assembly via the third pivot and the second pivot, respectively. The rear support assembly is movably provided with a rear support slider. The support linkage assembly includes a front support connector and a rear support connector, which are respectively pivotally connected to the front support assembly and the rear support slider. The left and right supports are connected via a rear support cross brace assembly, one end of which is connected to the first pivot, and the other end is connected to the rear support slider.

[0009] Specifically, a lower cross brace assembly is also provided between the support rod assemblies; the two ends of the lower cross brace assembly are respectively connected to the corresponding front support connector and the rear support connector shaft.

[0010] More specifically, the front bracket connector is also axially connected to a sub-connector, which is axially connected to the lower cross brace assembly.

[0011] The left and right brackets also include corresponding upper push rod assemblies; one end of the upper push rod assembly is connected to the corresponding lower push rod assembly shaft via a second connecting assembly.

[0012] More specifically, the left and right supports each include corresponding push rod assemblies; one end of the push rod assembly is connected to the shaft of the second connecting component, and the other end is connected to the shaft of the rear support assembly.

[0013] More specifically, the left and right supports also include corresponding seat post assemblies and seat post sliding sleeve assemblies, respectively; the seat post sliding sleeve assembly is sleeved on the seat post assembly; one end of the seat post assembly is connected to the shaft of the push rod support assembly.

[0014] More specifically, the left and right supports also include corresponding seat rod assemblies; one end of the seat rod assemblies is connected to the rear support connector shaft, and the other end is connected to the push rod assemblies and the seat rod assembly shaft.

[0015] More specifically, it also includes a backrest assembly, which is mounted on the seat post assembly and connected to the seat post assembly shaft.

[0016] The above-mentioned front bracket assembly between the left and right brackets is also provided with a front bracket connector; the front bracket connector is made of flexible or elastic material.

[0017] Furthermore, it also includes an armrest assembly and a sunshade assembly. The two ends of the armrest assembly are respectively connected to the corresponding push rod support assembly shaft; the two ends of the sunshade assembly are respectively connected to the corresponding second connecting assembly shaft.

[0018] The beneficial effects achieved by this utility model are: A four-fold stroller includes a left support and a right support. Each support comprises a corresponding lower push rod assembly, a front support assembly, a rear support assembly, a support linkage assembly, and a first connecting assembly. The first connecting assembly is fixed to one end of the rear support assembly and includes a first pivot, a second pivot, and a third pivot. The lower push rod assembly and the front support assembly are connected to the first connecting assembly via the third pivot and the second pivot, respectively. The rear support assembly has a movable rear support slider. The support linkage assembly includes a front support connector and a rear support connector, which are respectively pivotally connected to the front support assembly and the rear support slider. The left and right supports are connected via a rear support cross brace assembly, one end of which is connected to the first pivot, and the other end to the rear support slider. By setting three independent pivots on the first connecting assembly, the folding hub is optimized, improving structural stability and lifespan. The cooperation between the sub-connectors and the lower cross brace achieves more compact folding and storage. The flexible front support connector and reasonable accessory connection design make folding smoother and storage more organized, improving the overall user experience. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of a four-fold baby stroller according to an embodiment of the present utility model; Figure 2 This is a rear view structural diagram of a four-fold stroller according to an embodiment of the present utility model; Figure 3 This is a side view of a four-fold stroller according to an embodiment of the present invention; Figure 4 This is a side view sectional structural diagram of a four-fold baby stroller according to an embodiment of the present invention; Figure 5 This is a three-dimensional structural diagram of a four-fold stroller (in a half-folded state) according to an embodiment of the present utility model; Figure 6 This is a side view cross-sectional structural schematic diagram of a four-fold stroller (in a half-folded state) according to an embodiment of the present utility model; Figure 7 This is a three-dimensional structural diagram of a four-fold stroller (fully folded state) according to an embodiment of the present utility model; in, Figures 1 to 7 This includes: 1. Upper push rod assembly; 2. Downward push rod assembly; 21. Sunshade assembly; 3. Rear support assembly; 31. First connecting assembly; 311. First pivot; 312. Second pivot; 313. Third pivot; 32. Rear support sliding component; 33. Fourth pivot; 4. Front bracket assembly; 41. Front bracket connector; 5. Seat post assembly; 51. Seat post sliding sleeve assembly; 52. Backrest assembly; 6. Handrail assembly; 7. Push rod support assembly; 71. Seat rod support assembly; 711. Fifth pivot; 712. Sixth pivot; 72. Second connecting component; 721. Seventh rotating shaft; 722. Eighth rotating shaft; 8. Lower cross brace assembly; 81. Sub-connector; 9. Bracket connecting rod assembly; 91. Rear bracket connector; 911. Ninth pivot; 912. Tenth pivot; 913. Eleventh pivot; 92. Rear support cross brace assembly; 93. Front support connector; 931, Twelfth pivot; 932, Thirteenth pivot. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] Example 1 One implementation method of this utility model of a four-fold baby stroller, such as... Figures 1 to 7 As shown, it includes a symmetrically arranged left support and a right support. The left support and the right support each include a corresponding lower push rod assembly 2, a front support assembly 4, a rear support assembly 3, a support connecting rod assembly 9, a first connecting assembly 31, and an upper push rod assembly 1.

[0023] One end of the upper push rod assembly 1 is connected to the corresponding lower push rod assembly 2 via the seventh rotating shaft 721 on the second connecting assembly 72.

[0024] The first connecting component 31 is fixed at one end of the rear support component 3 and is provided with a first rotating shaft 311, a second rotating shaft 312 and a third rotating shaft 313; the lower push rod component 2 and the front support component 4 are respectively connected to the first connecting component 31 through the third rotating shaft 313 and the second rotating shaft 312.

[0025] The rear support assembly 3 is movably provided with a rear support slider 32. That is, the rear support assembly 3 is provided with a sliding groove, and the rear support slider 32 is movably disposed in the sliding groove.

[0026] The bracket connecting rod assembly 9 includes a front bracket connector 93 and a rear bracket connector 91. The front bracket connector 93 is provided with a twelfth pivot 931, which is connected to the front bracket assembly 4 shaft. The rear bracket connector 91 is connected to the rear bracket sliding member 32 shaft.

[0027] The left and right supports are connected by a rear support cross brace assembly 92. One end of the rear support cross brace assembly 92 is connected to the first rotating shaft 311, and the other end is connected to the rear support sliding member 32.

[0028] In a four-fold stroller of this utility model, the first connecting component 31 is rigidly connected to the rear support component 3, and three independent pivots (first pivot 311, second pivot 312 and third pivot 313) are provided. Spatially, these three sets of movements are provided with separate but structurally integrated fulcrums. This not only disperses the stress points and reduces the risk of a single bearing being subjected to complex bending moments and shear forces, but also reduces the probability of wear and loosening, improves structural stability and lifespan. Furthermore, it allows for more independent and precise engineering design of the folding angles between the front support component 4, the rear support component 3 and the lower push rod component 2, which may make the folding action smoother, reduce motion interference between components, and optimize the folding trajectory.

[0029] Example 2 One implementation method of this utility model of a four-fold baby stroller, such as... Figures 1 to 7 As shown, the main technical solution of this embodiment is basically the same as that of Embodiment 1. Features not explained in this embodiment are explained using the methods in Embodiment 1, and will not be repeated here. The difference between this embodiment and Embodiment 1 is as follows: Between the support rod assemblies 9, there is also a lower cross brace assembly 8; the two ends of the lower cross brace assembly 8 are respectively connected to the corresponding front support connector 93 and rear support connector 91 shaft.

[0030] Specifically, the front bracket connector 93 is also axially connected to a sub-connector 81. One end of the sub-connector 81 is axially connected to the front bracket connector 93 via an eleventh pivot 913, and the other end is axially connected to the lower cross brace assembly 8.

[0031] In this four-fold stroller, the sub-connector 81 serves as an additional kinematic pair (hinge point), providing extra degrees of freedom. This allows the lower cross brace assembly 8 to find a more compact and reasonable folding position during the folding process, further reducing the overall width after folding or avoiding collisions with other components, thus creating a better folding and storage path. Furthermore, the rod length and angle of the sub-connector can be used as design variables to fine-tune the stiffness characteristics of the lateral support system in the unfolded state.

[0032] Example 3 One implementation method of this utility model of a four-fold baby stroller, such as... Figures 1 to 7 As shown, the main technical solution of this embodiment is basically the same as that of Embodiment 1 or Embodiment 2. Features not explained in this embodiment adopt the explanations in Embodiment 1 or Embodiment 2, and will not be repeated here. The difference between this embodiment and Embodiment 1 or Embodiment 2 is: The left and right supports each include a corresponding push rod support assembly 7. One end of the push rod support assembly 7 is connected to the eighth rotating shaft 722 provided on the second connecting assembly 72, and the other end is connected to the fourth rotating shaft 33 provided on the rear support assembly 3.

[0033] Specifically, the left and right supports also include corresponding seat post assemblies 5 and seat post sliding sleeve assemblies 51, respectively. The seat post sliding sleeve assembly 51 is sleeved on the seat post assembly 5; one end of the seat post assembly 5 is connected to the push rod support assembly 7 via the fifth rotating shaft 711.

[0034] More specifically, the left and right supports also include corresponding seat rod support assemblies 71; one end of the seat rod support assembly 71 is connected to the tenth rotating shaft 912 on the rear support connector 91, and the other end is connected to the fifth rotating shaft 711, that is, it is simultaneously connected to the push rod support assembly 7 and the seat rod assembly 5.

[0035] In a four-fold stroller of this utility model, the linkage design of the push rod support assembly 7 connecting the second connecting assembly 72 and the rear support assembly 3, and the seat post assembly 5 and the seat post support assembly 71, enables the seat post assembly 5 to precisely coordinate with the movement of the push rod and the rear support during the folding and unfolding of the stroller frame, ensuring a stable transition of the seat posture and preventing the seat from swinging or twisting uncontrollably during the folding process.

[0036] One end of the seat post strut assembly 71 is connected to the rear support connector 91, and the other end is connected to the fifth pivot 711 at the junction of the push rod strut assembly 7 and the seat post assembly 5, forming a stable triangular support structure. This effectively distributes the load borne by the seat to the rear support and push rod system, significantly improving the load-bearing capacity of the seat area and the rigidity of the overall frame.

[0037] Example 4 One implementation method of this utility model of a four-fold baby stroller, such as... Figures 1 to 7 As shown, the main technical solution of this embodiment is basically the same as that of Embodiment 1, Embodiment 2, or Embodiment 3. Features not explained in this embodiment adopt the explanations in Embodiment 1, Embodiment 2, or Embodiment 3, and will not be repeated here. The difference between this embodiment and Embodiment 1, Embodiment 2, or Embodiment 3 is as follows: It also includes a backrest assembly 52, which is mounted on the seat post assembly 5 and is axially connected to the seat post assembly 5. The axial connection is located between the seat post sliding sleeve assembly 51 and the fifth rotating shaft 711.

[0038] Between the front bracket assembly 4 of the left bracket and the right bracket, there is also a front bracket connector 41; the front bracket connector 41 is made of flexible or elastic material.

[0039] The front bracket connector 41, which connects the left and right front bracket assemblies 4, is made of flexible or elastic material. When the frame is folded in width, this component can absorb the relative displacement of the left and right brackets through its own deformation, eliminating stress concentration, wear or abnormal noise that may occur during repeated folding of a purely rigid connection, making the folding action smoother and quieter, and improving the fatigue life of the component.

[0040] Furthermore, it also includes a handrail assembly 6 and a sunshade assembly 21. The two ends of the handrail assembly 6 are respectively connected to the corresponding push rod support assembly 7 via a sixth rotating shaft 712. The two ends of the sunshade assembly 21 are respectively connected to the seventh rotating shaft 721 on the corresponding second connecting assembly 72.

[0041] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A four-fold stroller, characterized in that, include: The left and right supports each include a corresponding lower push rod assembly, a front support assembly, a rear support assembly, a support connecting rod assembly, and a first connecting assembly. The first connecting component is fixed to one end of the rear support component and is provided with a first rotating shaft, a second rotating shaft and a third rotating shaft; the lower push rod component and the front support component are respectively connected to the first connecting component through the third rotating shaft and the second rotating shaft; The rear support assembly is movably provided with a rear support slider; The bracket linkage assembly includes a front bracket connector and a rear bracket connector, which are respectively connected to the front bracket assembly and the rear bracket sliding member shaft; The left and right supports are connected by a rear support cross brace assembly. One end of the rear support cross brace assembly is connected to the first rotating shaft, and the other end is connected to the rear support sliding shaft.

2. A four-fold stroller according to claim 1, characterized in that: A lower cross brace assembly is also provided between the support rod assemblies; The two ends of the lower cross brace assembly are respectively connected to the corresponding front bracket connector and the rear bracket connector shaft.

3. A four-fold baby stroller according to claim 2, characterized in that: The front bracket connector is also axially connected to a sub-connector, which is axially connected to the lower cross brace assembly.

4. A four-fold stroller according to any one of claims 1 to 3, characterized in that: The left and right supports also include corresponding upper push rod assemblies; One end of the upper push rod assembly is connected to the corresponding lower push rod assembly shaft via a second connecting assembly.

5. A four-fold stroller according to claim 4, characterized in that: The left and right supports each include corresponding push rod and strut assemblies; One end of the push rod support assembly is connected to the shaft of the second connecting assembly, and the other end is connected to the shaft of the rear support assembly.

6. A four-fold stroller according to claim 5, characterized in that: The left and right supports also include corresponding seat pole assemblies and seat pole sliding sleeve assemblies, respectively. The seat post sliding sleeve assembly is sleeved on the seat post assembly; one end of the seat post assembly is axially connected to the push rod support assembly.

7. A four-fold stroller according to claim 6, characterized in that: The left and right supports also include corresponding seat rod and strut assemblies; One end of the seat rod support assembly is connected to the rear bracket connector shaft, and the other end is connected to the push rod support assembly and the seat rod assembly shaft.

8. A four-fold stroller according to claim 6, characterized in that: It also includes a backrest assembly, which is disposed on the seat post assembly and axially connected to the seat post assembly.

9. A four-fold stroller according to any one of claims 1 to 3, characterized in that: A front bracket connector is also provided between the front bracket assemblies of the left and right brackets; The front bracket connector is made of flexible or elastic material.

10. A four-fold stroller according to claim 5, characterized in that: It also includes a handrail assembly and a sunshade assembly, wherein the two ends of the handrail assembly are respectively connected to the shafts of the corresponding push rod support assembly; and the two ends of the sunshade assembly are respectively connected to the shafts of the corresponding second connecting assembly.

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