Stroller framework

Abstract

The utility model discloses a stroller framework which comprises a foldable bottom supporting frame, the bottom supporting frame comprises a front leg and a rear leg which is rotatably connected with the front leg around a first axis, the lower end of the front leg is provided with a front wheel, the lower end of the rear leg is provided with a rear wheel, and the lower end of the front leg is provided with a rear wheel. A push rod assembly is rotatably connected to the bottom supporting frame around a second axis, a traction assembly capable of pulling the front legs to rotate and draw close to the rear legs when the push rod assembly rotates and draws close to the rear legs is arranged between the push rod assembly and the bottom supporting frame, and a seat frame is further rotatably connected to the bottom supporting frame around a third axis. A linkage assembly is further arranged between the seat frame and the bottom supporting frame, and the linkage assembly can slide downwards relative to the front legs to drive the seat frame to be close to the bottom supporting frame when the front legs rotate to be close to the rear legs. The folding chair is simple in structure and flexible to fold and unfold.

Description

[Technical Field]

[0001] This utility model relates to a children's stroller frame. [Background Technology]

[0002] With societal development, strollers have become an essential tool for infants and toddlers when traveling. Beyond the basic requirements of safety and sturdiness, parents are increasingly emphasizing features such as easy folding, compact size, and convenient storage. Therefore, most strollers now feature a folding mechanism, unfolding when in use and folding when not in use for convenient transport and to minimize space usage. Furthermore, the stroller designs on the market vary widely, with different folding principles.

[0003] This utility model provides a new implementation scheme that differs from the prior art. [Utility Model Content]

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a simple and flexible stroller frame.

[0005] This utility model is achieved through the following technical solution:

[0006] A stroller frame for children, which can be moved from an unfolded position to a folded position after the locking device is unlocked, includes a foldable bottom support frame. The bottom support frame includes a front leg and a rear leg rotatably connected to the front leg around a first axis. A front wheel is provided at the lower end of the front leg, and a rear wheel is provided at the lower end of the rear leg. A push rod assembly is rotatably connected to the bottom support frame around a second axis. A traction component is provided between the push rod assembly and the bottom support frame, which can pull the front leg to rotate and move towards the rear leg when the push rod assembly rotates and moves towards the rear leg. A seat frame is also rotatably connected to the bottom support frame around a third axis. A linkage component is provided between the seat frame and the bottom support frame, which can slide downward relative to the front leg and drive the seat frame to move towards the bottom support frame when the front leg rotates and moves towards the rear leg.

[0007] The linkage assembly includes a first linkage rod and a second linkage rod. The upper end of the first linkage rod is rotatably connected to the front side of the seat frame around a fourth axis. The second linkage rod is rotatably connected to the rear leg around a fifth axis. Furthermore, the lower parts of the second linkage rod and the first linkage rod are hinged to each other and can slide up and down along the front leg.

[0008] The seat frame includes a front frame and a rear frame rotatably connected to the front frame about a sixth axis. The rear frame is rotatably connected to the upper end of the rear leg about a third axis. The upper end of the first linkage rod is rotatably connected to the front part of the front frame about a fourth axis.

[0009] The front leg is provided with a sliding groove, and a sliding slider is provided in the sliding groove. The lower end of the first linkage rod is rotatably connected to the slider around the seventh axis.

[0010] The push rod assembly has a horizontally protruding protrusion at its lower end, and the seat frame has a positioning block on its rear side that abuts against the protrusion when the stroller frame is in the unfolded state.

[0011] The push rod assembly includes a lower push rod and an upper push rod. The lower end of the lower push rod is rotatably connected to the rear leg around the second axis. The upper end of the lower push rod is rotatably connected to the upper push rod around the eighth axis and is located near the lower end of the upper push rod. The traction assembly includes a traction rod. The upper end of the traction rod is rotatably connected to the lower end of the upper push rod around the ninth axis. The traction rod is rotatably connected to the rear leg around the tenth axis near its lower end. A transmission element is provided between the lower end of the traction rod and the front and rear legs, which can pull the front and rear legs to rotate and move closer together when the traction rod rotates relative to the rear leg.

[0012] The transmission components include a first transmission rod, a second transmission rod, and a third transmission rod. The front end of the first transmission rod is rotatably connected to the front leg about the eleventh axis. The rear end of the first transmission rod is rotatably connected to the front end of the second transmission rod about the twelfth axis. The rear end of the second transmission rod is rotatably connected to the rear leg about the thirteenth axis. The upper end of the third transmission rod is rotatably connected to the traction rod about the fourteenth axis. The lower end of the third transmission rod is rotatably connected to either the first or the second transmission rod about the fifteenth axis.

[0013] The stroller frame also includes a handrail assembly, which includes a sliding sleeve rotatably connected to a lower push rod about a sixteenth axis. A handrail rod that can slide inside the sliding sleeve is provided. The front end of the handrail rod is provided with a handle, and the rear end of the handrail rod is rotatably connected to a traction rod about a seventeenth axis.

[0014] The front end of the seat frame can also be rotatably connected to a leg support plate.

[0015] An elastic band is also provided between the lower ends of the front leg and the hind leg.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. During the folding process, the push rod assembly rotates and moves closer to the rear leg, while the traction assembly causes the front leg to rotate and move closer to the rear leg. At the same time, the front leg causes the linkage assembly to slide along it, thereby driving the seat frame to fold and move closer to the front leg. The whole structure is simple and compact, flexible in folding and closing, and has a small volume after folding, making it suitable for widespread application.

[0018] 2. The lower push rod of this utility model is rotatably connected to a sliding sleeve. When the stroller frame is folded, the handlebar slides backward in the sliding sleeve, so that the handlebar will not extend too far when the stroller frame is in the folded state, further reducing the volume of the stroller frame in the folded state, making it easy to carry or store.

[0019] 3. This utility model has a simple and compact structure, is flexible in folding, and has a small volume after folding. It can be carried in the overhead luggage rack of an airplane or placed in the trunk of a car, making it very convenient to carry. [Attached Image Description]

[0020] Figure 1 This is a perspective view of the utility model;

[0021] Figure 2 This is a side view of the present invention;

[0022] Figure 3 This is a cross-sectional view of the present invention in its unfolded state;

[0023] Figure 4 This is a side view of the present invention during the folding process;

[0024] Figure 5 This is a cross-sectional view of the present invention during the folding process;

[0025] Figure 6 This is a side view of the present invention in its folded state;

[0026] Figure 7 This is one of the perspective views of the components of this utility model;

[0027] Figure 8 This is the second perspective view of a component of this utility model.

Detailed Implementation Methods

[0028] The present invention will be further described below with reference to the accompanying drawings:

[0029] like Figures 1 to 6 As shown, a stroller frame can move from an unfolded position to a folded position after the locking device is unlocked. In the unfolded position, the stroller frame is suitable for sitting, while in the folded position, it is convenient for storage or carrying. This stroller frame features a multi-link linkage folding structure, which enables rapid folding through the coordinated movement of its components, significantly reducing its storage volume.

[0030] like Figures 1 to 6As shown, the stroller frame includes a foldable bottom support frame 1. The bottom support frame 1 includes a front leg 11 and a rear leg 12 rotatably connected to the front leg 1 around a first axis A. The lower end of the front leg 11 is provided with a front wheel 13, and the lower end of the rear leg 12 is provided with a rear wheel 14. A push rod assembly 2 is rotatably connected to the bottom support frame 1 around a second axis B. A traction assembly 3 is provided between the push rod assembly 2 and the bottom support frame 1. When the push rod assembly 2 rotates and folds towards the rear leg 12, the traction assembly 3 causes the front leg 11 to rotate and move towards the rear leg 12 simultaneously, achieving coordinated folding of the front leg 11 and the rear leg 12. A seat frame 4 is also rotatably connected to the bottom support frame 1 around a third axis C. The seat frame 4 is for a child to sit on, and a leg support plate 44 for supporting the legs is rotatably connected to the front end of the seat frame 4. The seat frame 4 and the bottom support frame 1 are further provided with a linkage component 5, which slides downward relative to the front leg 11 when the front leg 11 rotates and approaches the rear leg 12, thereby causing the seat frame 4 to move closer to the bottom support frame 1. When the front leg 11 moves closer to the rear leg 12, the linkage component 5 slides along the front leg 11, causing the seat frame 4 to rotate relative to the bottom support frame 1, so that the seat frame 4 automatically folds into the folding space formed by the front leg 11 and the rear leg 12. The folding of the stroller frame of this utility model can be achieved by simply rotating the push rod component 2 relative to the rear leg 12 to achieve the linkage action of the front leg 11 moving closer to the rear leg 12 and the seat frame 4 being stored between the front leg 11 and the rear leg 12. The entire folding process is flexible, and the folded size is small, which can be placed in the overhead luggage compartment of an airplane, making it very convenient to carry.

[0031] like Figures 1 to 5 As shown, the linkage component 5 includes a first linkage rod 51 and a second linkage rod 52. The upper end of the first linkage rod 51 is rotatably connected to the front side of the seat frame 4 around the fourth axis D. The second linkage rod 52 is rotatably connected to the rear leg 12 around the fifth axis E. The lower part of the second linkage rod 52 and the first linkage rod 51 are hinged to each other and can slide up and down along the front leg 11. During the process of the front leg 11 rotating and moving closer to the rear leg 12, the front leg 11 applies a force to the lower end of the first linkage rod 51, causing the lower ends of the first linkage rod 51 and the second linkage rod 52 to slide downward along the front leg 11. The first linkage rod 51 then pulls the seat frame 4 to rotate relative to the bottom support frame 1, causing the seat frame 4 to fold and close onto the bottom support frame 1. The second linkage rod 52 and the first linkage rod 51 work together to ensure smooth folding and to enhance the load-bearing strength of the seat frame 4 when the stroller frame is unfolded.

[0032] like Figure 3 and Figure 5As shown, the front leg 11 is provided with a sliding groove 15, and a sliding slider 53 is provided in the sliding groove 15. The lower end of the first linkage rod 51 is rotatably connected to the slider 53 around the seventh axis G, so as to ensure that the stroller frame can be folded flexibly and smoothly.

[0033] like Figures 1 to 5 As shown, the seat frame 4 includes a front frame 41 and a rear frame 42 rotatably connected to the front frame 41 about a sixth axis F. The seat frame 4 adopts a two-section structure of the front frame 41 and the rear frame 42, which can further reduce the folded volume and space occupied after the stroller frame is folded, making it convenient for users to carry. The rear frame 42 is rotatably connected to the upper end of the rear leg 12 about the third axis C, and the upper end of the first linkage rod 51 is rotatably connected to the front part of the front frame 41 about the fourth axis D. Figure 6 As shown, when the stroller frame is folded, the front frame 41 moves closer to the front leg 11, while the rear frame 42 extends roughly along the thickness direction of the stroller frame in the folded state, which ensures that the stroller frame is small in size when folded and that it can be folded smoothly.

[0034] like Figure 7 and Figure 8 As shown, the push rod assembly 2 has a horizontally protruding protrusion 21 at its lower end, and the seat frame 4 has a positioning block 43 on its rear side that abuts against the protrusion 21 when the stroller frame is in the unfolded state. By abutting against the protrusion 21, the stroller frame can be made more stable and reliable in the unfolded state.

[0035] like Figures 1 to 5 As shown, the push rod assembly 2 includes a lower push rod 22 and an upper push rod 23. The lower end of the lower push rod 22 is rotatably connected to the rear leg 12 around the second axis B. The upper end of the lower push rod 22 is rotatably connected to the upper push rod 23 around the eighth axis H and is located near the lower end of the upper push rod 23. The traction assembly 3 includes a traction rod 31. The upper end of the traction rod 31 is rotatably connected to the lower end of the upper push rod 23 around the ninth axis I. The upper end of the traction rod 31 and its lower end are rotatably connected to the rear leg 12 around the tenth axis J. A transmission element 32 is provided between the lower end of the traction rod 31 and the front leg 11 and the rear leg 12, which can pull the front leg 11 and the rear leg 12 to rotate and move closer together when the traction rod 31 rotates relative to the rear leg 12. When folding the stroller frame, rotating the upper push rod 23 forward and pressing it down causes the lower end of the upper push rod 23 to push the traction rod 31 to rotate relative to the rear leg 12. The lower end of the traction rod 31 then tilts upward, pulling the transmission component 32 to move. The transmission component 32 then causes the front leg 11 to rotate and move closer to the rear leg 12. At this time, the slider 53 slides downward along the front leg 11, and the first linkage rod 51 pulls the seat frame 4 to fold accordingly. Therefore, the entire folding operation can be achieved simply by rotating the upper push rod 23 forward and pressing it down, making the folding operation very convenient.

[0036] like Figures 1 to 5 As shown, the transmission component 32 includes a first transmission rod 321, a second transmission rod 322, and a third transmission rod 323. The front end of the first transmission rod 321 is rotatably connected to the front leg 11 around the eleventh axis K. The rear end of the first transmission rod 321 is rotatably connected to the front end of the second transmission rod 322 around the twelfth axis L. The rear end of the second transmission rod 322 is rotatably connected to the rear leg 12 around the thirteenth axis M. The upper end of the third transmission rod 323 is rotatably connected to the traction rod 31 around the fourteenth axis N. The lower end of the third transmission rod 323 is rotatably connected to either the first transmission rod 321 or the second transmission rod 322 around the fifteenth axis P. When the traction rod 31 rotates upward relative to the rear leg 12 and tilts upward, the lower end of the traction rod 31 pulls the third transmission rod 323, which in turn lifts the second transmission rod 322. The second transmission rod 322 then pulls the first transmission rod 321, thereby causing the front leg 11 to rotate and move closer to the rear leg 12. In this embodiment, the lower end of the third transmission rod 323 is connected to the second transmission rod 322 to make the stroller frame structure more compact and to ensure more flexible folding.

[0037] like Figures 1 to 6 As shown, the stroller frame also includes a handle assembly 6. The handle assembly 6 includes a sliding sleeve 61 rotatably connected to the lower push rod 22 about the sixteenth axis Q. A handlebar 62 that can slide inside the sliding sleeve 61 is inserted therein. The front end of the handlebar 62 is provided with a handle 63, and the rear end of the handlebar 62 is rotatably connected to the traction rod 31 about the seventeenth axis R. During the rotation of the traction rod 3 relative to the rear leg 12, the traction rod 31 pulls the rear end of the handlebar 62, causing the handlebar 62 to slide backward within the sliding sleeve 61. This causes the handlebar 6, which originally extends forward for a longer period, to move backward. When the stroller is folded, the front end of the handlebar 6 moves to a position close to the upper end of the rear leg 12, ensuring that the stroller frame is compact when folded.

[0038] An elastic band (not shown in the figure) can also be provided between the lower ends of the front leg 11 and the rear leg 12. When the stroller is unfolded, the elastic band is taut. When the stroller is folded, simply unlock the locking device and slightly turn the push rod 23 forward. The elastic band will then spring back, pulling the front leg 11 and the rear leg 12, thus automatically folding the stroller frame. This makes folding the stroller frame simpler and faster for the user. In this invention, the locking device can adopt a traditional locking structure, such as a gear lock structure or a pin and hole locking structure, etc., which will not be described in detail here.

[0039] This utility model of a children's stroller frame achieves rapid folding through the coordinated operation of multiple linkages, offering flexible folding and easy operation. After the locking device is unlocked, the push rod assembly 2 rotates and folds towards the rear leg 12, while the traction assembly 3 simultaneously pulls the front leg 11 towards the rear leg 12. At the same time, the linkage assembly 5 drives the seat frame 4 to slide down along the front leg 11, allowing all components to fold compactly. After folding, the front and rear wheels 13 and 14 are aligned side by side, and the lower end of the upper push rod 23 can rest against the ground, forming a joint support with the rear wheel 14 to keep the folded stroller frame upright, facilitating carrying and storage. The overall volume of the folded stroller frame is significantly reduced, meeting the size standards for airline carry-on baggage and easily fitting into the overhead bins. Folding is achieved automatically with just a slight turn of the upper push rod 23, making it easy to operate and carry with one hand. It is very convenient to use and suitable for widespread application.

[0040] The present invention has been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the invention.

Claims

1. A stroller frame that can move from an unfolded position to a folded position after the locking device is unlocked, characterized in that: The device includes a foldable bottom support frame (1), which includes a front leg (11) and a rear leg (12) rotatably connected to the front leg (11) about a first axis (A). The lower end of the front leg (11) is provided with a front wheel (13), and the lower end of the rear leg (12) is provided with a rear wheel (14). A push rod assembly (2) is rotatably connected to the bottom support frame (1) about a second axis (B). A space is provided between the push rod assembly (2) and the bottom support frame (1). (2) A traction component (3) that can pull the front leg (11) to rotate and move closer to the rear leg (12) when the rear leg (12) rotates and moves closer to the rear leg (12). A seat frame (4) is rotatably connected to the bottom support frame (1) around the third axis (C). A linkage component (5) is provided between the seat frame (4) and the bottom support frame (1) that can slide downward relative to the front leg (11) and drive the seat frame (4) to move closer to the bottom support frame (1) when the front leg (11) rotates and moves closer to the rear leg (12).

2. The stroller frame according to claim 1, characterized in that: The linkage component (5) includes a first linkage rod (51) and a second linkage rod (52). The upper end of the first linkage rod (51) is rotatably connected to the front side of the seat frame (4) around the fourth axis (D). The second linkage rod (52) is rotatably connected to the rear leg (12) around the fifth axis (E). The lower part of the second linkage rod (52) and the first linkage rod (51) are hinged to each other and can slide up and down along the front leg (11).

3. The stroller frame according to claim 2, characterized in that: The seat frame (4) includes a front frame (41) and a rear frame (42) rotatably connected to the front frame (41) about a sixth axis (F). The rear frame (42) is rotatably connected to the upper end of the rear leg (12) about a third axis (C). The upper end of the first linkage rod (51) is rotatably connected to the front part of the front frame (41) about a fourth axis (D).

4. The stroller frame according to claim 2, characterized in that: The front leg (11) is provided with a groove (15), and a sliding block (53) is provided in the groove (15). The lower end of the first linkage rod (51) is rotatably connected to the sliding block (53) around the seventh axis (G).

5. The stroller frame according to claim 1, characterized in that: The push rod assembly (2) has a horizontally protruding protrusion (21) at its lower end, and the seat frame (4) has a positioning block (43) on its rear side that abuts against the protrusion (21) when the stroller frame is in the unfolded state.

6. The stroller frame according to any one of claims 1 to 5, characterized in that: The push rod assembly (2) includes a lower push rod (22) and an upper push rod (23). The lower end of the lower push rod (22) is rotatably connected to the rear leg (12) around the second axis (B). The upper end of the lower push rod (22) is rotatably connected to the upper push rod (23) around the eighth axis (H) and is located near the lower end of the upper push rod (23). The traction assembly (3) includes a traction rod (31). The upper end of the traction rod (31) is rotatably connected to the lower end of the upper push rod (23) around the ninth axis (I). The upper end of the traction rod (31) and the rear leg (12) around the tenth axis (J) are rotatably connected to the rear leg (12) around the tenth axis (J). A transmission element (32) is provided between the lower end of the traction rod (31) and the front leg (11) and the rear leg (12) to pull the front leg (11) and the rear leg (12) to rotate and move closer together when the traction rod (31) rotates relative to the rear leg (12).

7. The stroller frame according to claim 6, characterized in that: The transmission component (32) includes a first transmission rod (321), a second transmission rod (322), and a third transmission rod (323). The front end of the first transmission rod (321) is rotatably connected to the front leg (11) around the eleventh axis (K). The rear end of the first transmission rod (321) is rotatably connected to the front end of the second transmission rod (322) around the twelfth axis (L). The rear end of the second transmission rod (322) is rotatably connected to the rear leg (12) around the thirteenth axis (M). The upper end of the third transmission rod (323) is rotatably connected to the traction rod (31) around the fourteenth axis (N). The lower end of the third transmission rod (323) is rotatably connected to the first transmission rod (321) or the second transmission rod (322) around the fifteenth axis (P).

8. The stroller frame according to claim 6, characterized in that: The stroller frame also includes a handrail assembly (6), which includes a sliding sleeve (61) rotatably connected to the lower push rod (22) around the sixteenth axis (Q). A handrail rod (62) that can slide inside the sliding sleeve (61) is provided. The front end of the handrail rod (62) is provided with a handrail handle (63), and the rear end of the handrail rod (62) is rotatably connected to the traction rod (31) around the seventeenth axis (R).

9. The stroller frame according to claim 1, characterized in that: The front end of the seat frame (4) can also be rotatably connected to a leg support plate (44).

10. The stroller frame according to claim 1, characterized in that: An elastic band is also provided between the lower ends of the front leg (11) and the hind leg (12).

Images