Frame and stroller

Abstract

The utility model discloses a frame and a stroller, and relates to the technical field of children products, the frame has an unfolded state and a folded state, and comprises a front support, a rear support and a push rod; the frame further comprises a linkage assembly, the linkage assembly comprises a sliding sleeve arranged on the front support in a sliding mode, a connecting rod rotationally installed on the sliding sleeve and a first swing rod movably connected with the connecting rod, the end, away from the sliding sleeve, of the connecting rod is rotationally arranged on the rear support, and the end, away from the connecting rod, of the first swing rod is movably connected to the push rod. When the push rod gets close to the rear support, the first swing rod drives the sliding sleeve to slide downwards through the connecting rod so that the front support can get close to the rear support; the frame is further provided with a seat rod, the seat rod is rotationally installed on the rear support or the first swing rod, the linkage assembly is further provided with a second swing rod movably connected with the seat rod, and the second swing rod is matched with the sliding sleeve so as to drive the seat rod to turn upwards when the sliding sleeve slides. The utility model provides the frame which can be fully folded.

Description

Technical Field

[0001] The utility model relates to the technical field of children's products, in particular to a frame and a child stroller. Background Art

[0002] The prior art stroller includes a frame having an unfolded state and a folded state. The current frame cannot be fully folded, and the folded frame is too large to be carried on an airplane. Utility Model Content

[0003] The main purpose of the utility model is to provide a frame and a child stroller, aiming to provide a fully foldable frame.

[0004] To achieve the above-mentioned purpose, the utility model provides a frame having an unfolded state and a folded state, comprising a front bracket, a rear bracket and a push rod.

[0005] Two of the three components of the front bracket, the rear bracket and the push rod are rotatably connected, and the third component is rotatably connected to at least one of the two components;

[0006] The frame further comprises a linkage assembly, the linkage assembly comprising a sliding sleeve slidably arranged on the front bracket, a connecting rod rotatably mounted on the sliding sleeve, and a first swing rod movably connected to the connecting rod, an end of the connecting rod away from the sliding sleeve being rotatably arranged on the rear bracket, and an end of the first swing rod away from the connecting rod being movably connected to the push rod; when the push rod moves toward the rear bracket, the first swing rod drives the sliding sleeve to slide downward through the connecting rod to bring the front bracket and the rear bracket closer;

[0007] The frame also has a seat rod, which is rotatably mounted on the rear bracket or the first swing arm. The linkage assembly also has a second swing arm movably connected to the seat rod, and the second swing arm cooperates with the sliding sleeve to drive the seat rod to flip upward when the sliding sleeve slides.

[0008] In one embodiment, the first swing arm and the seat rod are rotatably mounted on a sixth rotating shaft, the second swing arm and the seat rod are rotatably mounted on a seventh rotating shaft, and the seventh rotating shaft is arranged relatively in front of the sixth rotating shaft.

[0009] In one embodiment, the seventh rotating shaft is relatively arranged at one end of the seat post close to the front bracket.

[0010] In one embodiment, one end of the second swing arm away from the seat rod is rotatably mounted on a fourth rotating shaft together with the connecting rod, and the seventh rotating shaft is located above and behind the fourth rotating shaft.

[0011] In one embodiment, the frame further has a backrest rod rotatably mounted on the seat rod. When the seat rod flips upward, it drives the backrest rod to flip downward.

[0012] In one embodiment, the rotational mounting position of the first swing rod and the connecting rod is set at a position on the connecting rod close to the rear bracket.

[0013] In one embodiment, the first swing rod is rotatably connected to the connecting rod through a first rotating shaft, the connecting rod is rotatably connected to the front bracket through a second rotating shaft, the connecting rod is rotatably connected to the rear bracket through a third rotating shaft, and the first rotating shaft is located between the second rotating shaft and the third rotating shaft.

[0014] In one embodiment, the horizontal height of the first rotating shaft is above the horizontal height of the second rotating shaft and below the horizontal height of the third rotating shaft.

[0015] In one embodiment, the push rod includes a rod body and a rotating joint provided on the rod body;

[0016] The rotating joint is rotatably connected to the front bracket or the rear bracket along an eighth rotating shaft, and the first swing rod is rotatably connected to the rotating joint along a fifth rotating shaft.

[0017] In one embodiment, in the unfolded state, the fifth rotating shaft is relatively located behind and above the eighth rotating shaft.

[0018] The present utility model also provides a baby stroller, including the frame as described above, a backrest provided on the frame, a front wheel assembly provided at the lower part of the front bracket, and a rear wheel assembly provided at the bottom of the rear bracket.

[0019] The technical solution of the present utility model can form a four-bar linkage mechanism with the first swing rod, the connecting rod, the second swing rod and the seat rod, and the connecting rod can slide relative to the front bracket through a sliding sleeve; in this way, when the frame is switched from the unfolded state to the folded state, the push rod can be manually or otherwise pressed downward, so that the push rod approaches the rear bracket under the action of gravity, so as to drive the first swing rod to rotate. Under the rotation of the first swing rod, the four-bar linkage mechanism can be driven to rotate, so that the seat rod flips upward, and at the same time, the end of the connecting rod away from the rear bracket slides relative to the front bracket, so as to drive the front bracket to approach the rear bracket through the connecting rod, thereby completing the folding of the frame. Therefore, the four-bar linkage mechanism formed by the first swing rod, the connecting rod, the second swing rod and the seat rod can realize the stable folding of the frame, and the volume of the folded frame is small, achieving the effect of full folding and can be carried on the plane. Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0021] Figure 1 The side view of an embodiment of the frame provided by the present invention in the unfolded state;

[0022] Figure 2 For Figure 1 The partial enlarged view of part A in

[0023] Figure 3 The side view of an embodiment of the frame provided by the present invention during the folding process;

[0024] Figure 4 For Figure 3 The partial enlarged view of part B in

[0025] Figure 5 The side view of an embodiment of the frame provided by the present invention in the folded state;

[0026] Figure 6 The structural schematic diagram of an embodiment of the frame provided by the present invention in the unfolded state;

[0027] Figure 7 For Figure 6 The partial enlarged view of part C in

[0028] Explanation of the reference numerals in the drawings:

[0029] 100, frame; 11, front bracket; 12, rear bracket; 13a, rod body; 13b, rotating joint; 13, push rod; 131, lower push rod; 132, upper push rod; 10, linkage assembly; 14, first swing rod; 15, connecting rod; 151, sliding sleeve; 16, second swing rod; 20, seat rod; 31, first rotating shaft; 32, second rotating shaft; 33, third rotating shaft; 34, fourth rotating shaft; 35, fifth rotating shaft; 36, sixth rotating shaft; 37, seventh rotating shaft; 38, eighth rotating shaft; 310, tenth rotating shaft; 300, front wheel assembly; 400, rear wheel assembly.

[0030] The realization of the object, functional features and advantages of the present invention will be further described with reference to the embodiments and the drawings. Detailed implementation manners

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0034] The prior art stroller includes a frame having an unfolded state and a folded state. The current frame cannot be fully folded, and the folded frame is too large to be carried on an airplane.

[0035] Based on the above problems, the utility model proposes a bicycle frame, aiming to provide a fully foldable bicycle frame.

[0036] See also Figures 1 to 6 In one embodiment of the utility model, the frame 100 has an unfolded state and a folded state, and the frame 100 includes a front bracket 11, a rear bracket 12 and a push rod 13, two of the three components of the front bracket 11, the rear bracket 12 and the push rod 13 are rotatably connected, and the third component is rotatably connected to at least one of the two components;

[0037] The frame 100 further includes a linkage assembly 10. The linkage assembly 10 includes a sliding sleeve 151 slidably disposed on the front bracket 11, a connecting rod 15 rotatably mounted on the sliding sleeve 151, and a first swing rod 14 movably connected to the connecting rod 15. One end of the connecting rod 15 away from the sliding sleeve 151 is rotatably disposed on the rear bracket 12, and one end of the first swing rod 14 away from the connecting rod 15 is movably connected to the push rod 13. When the push rod 13 moves closer to the rear bracket 12, the first swing rod 14 drives the sliding sleeve 151 to slide downward through the connecting rod 15 so that the front bracket 11 and the rear bracket 12 move closer. The frame 100 further has a seat post 20. The seat post 20 is rotatably mounted on the rear bracket 12 or the first swing rod 14. The linkage assembly 10 further has a second swing rod 16 movably connected to the seat post 20. The second swing rod 16 cooperates with the sliding sleeve 151 to drive the seat post 20 to flip upward when the sliding sleeve 151 slides.

[0038] The technical solution of the present utility model can form a four-bar linkage mechanism with the first swing rod 14, the connecting rod 15, the second swing rod 16 and the seat post 20, and enable the connecting rod 16 to slide relative to the front bracket 11 through the sliding sleeve 151. In this way, when the frame 100 is switched from the unfolded state to the folded state, the push rod 13 can be pressed manually or by other means, so that the push rod 13 moves closer to the rear bracket 12 under the action of gravity to drive the first swing rod 14 to rotate. Under the rotation of the first swing rod 14, the four-bar linkage mechanism can be driven to rotate, so that the seat post 20 flips upward, and at the same time, one end of the connecting rod 20 away from the rear bracket 12 slides relative to the front bracket 11, so as to drive the front bracket 11 to move closer to the rear bracket 12 through the connecting rod 15, thereby completing the folding of the frame 100. Therefore, the four-bar linkage mechanism formed by the first swing rod 14, the connecting rod 15, the second swing rod 16 and the seat post 20 can realize the stable folding of the frame 100, and make the volume of the folded frame 100 smaller, achieving the effect of full folding and being portable on the plane.

[0039] In this embodiment, the front bracket 11, the rear bracket 12 and the push rod 13 are used to support the entire frame 100 to ensure the stability of the frame 100 in both the unfolded state and the folded state, facilitating the stable driving of the stroller under various road conditions.

[0040] The function of the linkage assembly 10 is to drive the front bracket 11, the rear bracket 12, the push rod 13 and the seat post 20 to fold under their own gravity when the frame 100 is switched from the unfolded state to the folded state, and to drive the front bracket 11, the rear bracket 12, the push rod 13 and the seat post 20 to unfold when the frame 100 is switched from the folded state to the unfolded state.

[0041] As some examples, the frame 100 can also be provided with a switch structure to lock the frame 100 in the unfolded state or the folded state through the switch structure, or to unlock the frame 100 so that the frame 100 can be switched between the unfolded state and the folded state. When the switch structure unlocks the frame 100, the frame 100 can fold by relying on its own gravity.

[0042] In the actual application process, the first swing rod 14 and the push rod 13 can be rotatably connected by a rotating shaft, or can be rotatably connected by a spherical joint. Similarly, the first swing rod 14 and the connecting rod 15 can be rotatably connected by a rotating shaft, or can be rotatably connected by a spherical joint.

[0043] As some examples, the front bracket 11 can be in a U-shaped tubular structure, and the two free ends of the U-shaped tubular structure are symmetric structures. The rear bracket 12 can be in an H-shaped tubular structure, and the two long tubes of the H-shaped tubular structure are symmetric structures. The push rod 13 can also be in a U-shaped tubular structure, and the two free ends of the U-shaped tubular structure are symmetric structures. The seat post 20 can also be in a U-shaped tubular structure, and the two free ends of the U-shaped tubular structure are symmetric structures. In this way, there are two first swing rods 14, two connecting rods 15, and two second swing rods 16. The two first swing rods 14, the two connecting rods 15, and the two second swing rods 16 are all symmetric structures. The folding of the frame 100 is realized by using the two first swing rods 14, the two connecting rods 15, and the two second swing rods 16, which can further improve the folding stability of the frame 100.

[0044] In the actual application process, the lengths and shapes of the first swing rod 14 and the second swing rod 16 can be the same or different.

[0045] In the actual application process, the first swing rod 14 and the push rod 13 can be rotatably connected by a rotating shaft, or can be rotatably connected by a spherical joint. Similarly, between the first swing rod 14 and the connecting rod 15, between the second swing rod 16 and the connecting rod 15, and between the second swing rod 16 and the seat post 20 can be rotatably connected by a rotating shaft, or can be rotatably connected by a spherical joint.

[0046] As some examples, the first swing rod 14, the connecting rod 15, and the second swing rod 16 of the linkage assembly 10 can be made of stainless steel material, so that the linkage assembly 10 has higher strength and stability to ensure the service life of the linkage assembly 10.

[0047] In this embodiment, the sliding sleeve 151 is slidably sleeved on the front bracket 11. In this way, the sliding sleeve can be directly slidably sleeved on the front bracket 11, which can not only improve the smoothness of the frame 100 during the folding process and the unfolding process, but also the design and assembly of the sliding sleeve are simpler.

[0048] Please refer to Figure 7 In an embodiment of the present utility model, the first swing rod 14 and the seat rod 20 are rotatably installed on the sixth rotating shaft 36, and the second swing rod 16 and the seat rod 20 are rotatably installed on the seventh rotating shaft 37. The seventh rotating shaft 37 is relatively arranged on the front side of the sixth rotating shaft 36.

[0049] With such an arrangement, when the first swing rod 14 rotates to drive the connecting rod 15 to rotate, and the connecting rod 15 drives the second swing rod 16 to rotate, the second swing rod 16 can pull the seat rod 20 to turn upwards, so as to improve the stability of the seat rod 20 during the upward turning process.

[0050] Please refer to Figure 7 In an embodiment of the present utility model, the seventh rotating shaft 37 is relatively arranged at one end of the seat rod 20 close to the front bracket 11.

[0051] With such an arrangement, when the first swing rod 14 rotates to drive the connecting rod 15 to rotate, and the connecting rod 15 drives the second swing rod 16 to rotate, the second swing rod 16 can pull the end of the seat rod 20 close to the front bracket 11 to move downwards, so that the end of the seat rod 20 close to the rear bracket 12 turns upwards, so as to realize the folding of the seat rod 20 and the backrest rod.

[0052] Please refer to Figure 7 In an embodiment of the present utility model, one end of the second swing rod 16 far from the seat rod 20 is rotatably installed on the connecting rod 15 at the fourth rotating shaft 34, and the seventh rotating shaft 37 is located above and behind the fourth rotating shaft 34.

[0053] With such an arrangement, the connecting rod 15 can drive one end of the second swing rod 16 connected to the connecting rod 15 to rotate along the fourth rotating shaft 34, and make one end of the second swing rod 16 connected to the seat rod 20 rotate along the seventh rotating shaft 37, so that the second swing rod 16 swings. When the connecting rod 15 slides down relative to the front bracket 11, the second swing rod 16 can pull the side of the seat rod 20 far from the backrest to press down smoothly, so that the side of the seat rod 20 close to the backrest rod turns upwards.

[0054] In the actual application process, the fourth rotating shaft 34 and the seventh rotating shaft 37 can also be separate structures, or directly connected to one of the structures, and details are not described one by one here.

[0055] Please refer to Figure 6 In an embodiment of the present utility model, the vehicle frame 100 further has a backrest rod, and the backrest rod is rotatably installed on the seat rod 20. When the seat rod 20 turns upwards, it drives the backrest rod to turn downwards.

[0056] With such a setting, the rotation of the first swing rod 14 can drive the four-bar linkage to rotate, causing the seat post 20 to flip upward and driving the backrest rod downward. At the same time, the end of the connecting rod 15 far from the rear bracket 12 slides relative to the front bracket 11, so as to drive the front bracket 11 to approach the rear bracket 12 through the connecting rod 15, thereby completing the full folding of the vehicle frame 100.

[0057] Please refer to Figure 6 , in an embodiment of the present invention, the rotational mounting positions of the first swing rod 14 and the connecting rod 15 are set at a position on the connecting rod 15 close to the rear bracket 12.

[0058] With such a setting, when the first swing rod 14 rotates, it can better pull the connecting rod 15, so that the end of the connecting rod 15 close to the front bracket 11 rotates relative to the front bracket 11 and moves downward at the same time, also increasing the lever of the gravity effect and realizing the automatic folding effect.

[0059] Please refer to Figure 2 , Figure 4 , Figure 7 , in an embodiment of the present invention, the first swing rod 14 is rotatably connected to the connecting rod 15 through a first rotating shaft 31, the connecting rod 15 is rotatably connected to the front bracket 11 through a second rotating shaft 32, and the connecting rod 15 is rotatably connected to the rear bracket 12 through a third rotating shaft 33. The first rotating shaft 31 is located between the second rotating shaft 32 and the third rotating shaft 33.

[0060] With such a setting, by making the first rotating shaft 31 located between the second rotating shaft 32 and the third rotating shaft 33, the first rotating shaft 31 and the third rotating shaft 33 can both be located behind the second rotating shaft 32. When the push rod 13 is pressed down to drive the first swing rod 14 to rotate, the first swing rod 14 can smoothly drive the connecting rod 15 to rotate and can also slide relative to the front bracket 11, so as to drive the second swing rod 16 to rotate through the connecting rod 15. Under the rotation of the second cover plate, the seat post 20 can be driven to flip upward, and at the same time, the front bracket 11 can be driven to approach the rear bracket 12 through the connecting rod 15 to achieve folding, and at the same time, the arrangement of each structure can be made more compact.

[0061] In the actual application process, the first rotating shaft 31 can be a separate structure, and both ends of the first rotating shaft 31 can be respectively inserted into the connection holes of the first swing rod 14 and the connecting rod 15; alternatively, the first rotating shaft 31 can also be a structure with one end directly connected to the first swing rod 14 or the connecting rod 15, so that the other end of the first rotating shaft 31 is inserted into the connection hole of the connecting rod 15 or the first swing rod 14. Similarly, the second rotating shaft 32 can be a separate structure, and both ends of the second rotating shaft 32 can be respectively inserted into the connection holes of the connecting rod 15 and the front support 11; alternatively, the second rotating shaft 32 can also be a structure with one end directly connected to the connecting rod 15 or the front support 11, so that the other end of the second rotating shaft 32 is inserted into the connection hole of the front support 11 or the connecting rod 15. Similarly, the third rotating shaft 33 can be a separate structure, and both ends of the third rotating shaft 33 can be respectively inserted into the connection holes of the connecting rod 15 and the rear support 12; alternatively, the third rotating shaft 33 can also be a structure with one end directly connected to the connecting rod 15 or the rear support 12, so that the other end of the third rotating shaft 33 is inserted into the connection hole of the rear support 12 or the connecting rod 15.

[0062] As some examples, the first rotating shaft 31 can adopt a self-lubricating bearing design to reduce the friction when the first swing rod 14 rotates relative to the connecting rod 15, and can improve the movement efficiency. Similarly, the second rotating shaft 32 can also adopt a self-lubricating bearing design to reduce the friction when the connecting rod 15 rotates relative to the front support 11, and can improve the movement efficiency. Similarly, the third rotating shaft 33 can also adopt a self-lubricating bearing design to reduce the friction when the connecting rod 15 rotates relative to the rear support 12, and can improve the movement efficiency.

[0063] As some examples, the extending directions of the first rotating shaft 31, the second rotating shaft 32, and the third rotating shaft 33 are arranged in parallel, which can make the movement process more stable.

[0064] Please refer to Figure 2 、 Figure 4 , in an embodiment of the present utility model, the horizontal height of the first rotating shaft 31 is above the horizontal height of the second rotating shaft 32 and below the horizontal height of the third rotating shaft 33.

[0065] With such a setting, when the frame 100 switches from the unfolded state to the folded state, when the push rod 13 approaches the rear bracket 12 under the action of gravity, the end of the first swing rod 14 connected to the link 15 can be driven to rotate along the first rotating shaft 31, and the first rotating shaft 31 can be driven to approach the rear bracket 12. Furthermore, the end of the link 15 connected to the rear bracket 12 can be driven to rotate along the third rotating shaft 33, and the end of the link 15 connected to the front bracket 11 can be driven to rotate along the second rotating shaft 32. At the same time, the end of the link 15 connected to the front bracket 11 slides downward relative to the front bracket 11, which can drive the front bracket 11 to approach the rear bracket 12. At the same time, the link 15 can also drive the second swing rod 16 to rotate, and then drive the seat post 20 to turn upward through the second swing rod 16. In this way, the upward turning of the seat post 20 and the stable folding of the frame can be realized with a relatively small number of connecting rods.

[0066] It should be noted that the horizontal height of the first rotating shaft 31 is above the horizontal height of the second rotating shaft 32 and below the horizontal height of the third rotating shaft 33, which means that the horizontal height of the center line of the first rotating shaft 31 is above the horizontal height of the center line of the second rotating shaft 32 and above the horizontal height of the center line of the third rotating shaft 33.

[0067] Please refer to Figure 1 、 Figure 6 In an embodiment of the present invention, the push rod 13 includes a rod body 13a and a rotating joint 13b provided on the rod body 13a; the rotating joint 13b is rotatably connected to the front bracket 11 or the rear bracket 12 along the eighth rotating shaft 38, and the first swing rod 14 is rotatably connected to the rotating joint 13b along the fifth rotating shaft 35.

[0068] With such a setting, by using the eighth rotating shaft 38 to realize the rotational connection between the rotating joint 13b of the push rod 13 and the front bracket 11 or the rear bracket 12, and using the fifth rotating shaft 35 to realize the rotational connection between the first swing rod 14 and the rotating joint 13b, the front bracket 11, the rear bracket 12 and the first swing rod 14 can all be rotatably connected to the rotating joint 13b of the push rod 13, and the eighth rotating shaft 38 and the fifth rotating shaft 35 are arranged eccentrically, which is more convenient to realize the connection between the front bracket 11 and the rear bracket 12 and the push rod 13, and the connection between the first swing rod 14 and the push rod 13. At the same time, during the folding process, the front bracket 11 and the push rod 13 can both approach the rear bracket 12 to realize automatic folding.

[0069] In the actual application process, the fifth rotating shaft 35 and the eighth rotating shaft 38 can also be separate structures, or directly connected to one of the structures, and will not be elaborated one by one here.

[0070] Please refer to Figure 7 In an embodiment of the present invention, in the unfolded state, the fifth rotating shaft 35 is relatively arranged behind and above the eighth rotating shaft 38.

[0071] With such a setting, since the push rod 13 is usually located above the front bracket 11 and the rear bracket 12 in the unfolded state, by making the horizontal height of the fifth rotating shaft 35 above the horizontal height of the eighth rotating shaft 38, interference between the fifth rotating shaft 35 and the eighth rotating shaft 38 can be avoided, so that the push rod 13 can smoothly drive the first swing rod 14 to rotate along the fifth rotating shaft 35.

[0072] It should be noted that the horizontal height of the fifth rotating shaft 35 being above the horizontal height of the eighth rotating shaft 38 means that the horizontal height of the center line of the fifth rotating shaft 35 is above the horizontal height of the center line of the eighth rotating shaft 38.

[0073] Please refer to Figure 1 、 Figure 3 In an embodiment of the present utility model, the rod body 13a includes a lower push rod 131 and an upper push rod 132; the lower part of the lower push rod 131 is rotatably connected to the rotating joint 13b; the lower part of the upper push rod 132 is rotatably connected to the upper part of the lower push rod 131; when the vehicle frame 100 is folded, the upper push rod 132 is flipped forward to approach the lower push rod 131, and the lower push rod 131 drives the upper push rod 132 to approach the rear bracket 12.

[0074] With such a setting, when the vehicle frame 100 is switched from the unfolded state to the folded state, the upper push rod 132 can be flipped forward manually or by other means to make the upper push rod 132 approach the lower push rod 131, and then the upper push rod 132 is pressed down, so that the upper push rod 132 and the lower push rod 131 can approach the rear bracket 12 under the action of gravity. In this way, in the folded state, the occupied space of the push rod 13 in height can be shortened, and the volume of the vehicle frame 100 can be further reduced.

[0075] As some examples, in order to ensure the rotational connection stability between the upper push rod 132 and the lower push rod 131, the upper push rod 132 can be rotatably connected to the lower push rod 131 through the tenth rotating shaft 310.

[0076] In one embodiment, the first swing rod 14 is rotatably connected to the connecting rod 15 through the first rotating shaft 31, the connecting rod 15 is rotatably connected to the sliding sleeve 151 through the second rotating shaft 32, and the second swing rod 16 is rotatably connected to the connecting rod 15 through the fourth rotating shaft 34. The fourth rotating shaft 34 is located between the first rotating shaft 31 and the second rotating shaft 32. In this way, by making the fourth rotating shaft 34 located between the first rotating shaft 31 and the second rotating shaft 32, both the first rotating shaft 31 and the fourth rotating shaft 34 can be located behind the second rotating shaft 32. When the first swing rod 14 drives the connecting rod 15 to rotate and slide relative to the front bracket 11 at the same time, the end of the second swing rod 16 connected to the connecting rod 15 can be driven to rotate along the fourth rotating shaft 34, so as to drive the second swing rod 16 to approach the rear bracket 12, that is, the side of the seat rod 20 away from the backrest can be pressed down, so that the side of the seat rod 20 close to the backrest can be turned up, and at the same time, the arrangement of each structure can be made more compact.

[0077] Please refer to Figure 2 、 Figure 4 , in one embodiment of the present utility model, the horizontal height of the fourth rotating shaft 34 is below the horizontal height of the first rotating shaft 31 and above the horizontal height of the second rotating shaft 32. In this way, under the condition that the vehicle frame 100 is switched from the unfolded state to the folded state, when the end of the connecting rod 15 connected to the front bracket 11 slides downward along the length direction of the front bracket 11, it can drive the second swing rod 16 to rotate and pull the second swing rod 16 downward at the same time, and then drive the side of the seat rod 20 away from the backrest to be pressed down through the second swing rod 16, so that the side of the seat rod 20 close to the backrest can be turned up, so that the upward turning of the seat rod 20 and the stable folding of the vehicle frame can be realized with a smaller number of connecting rods.

[0078] It should be noted that the horizontal height of the fourth rotating shaft 34 being below the horizontal height of the first rotating shaft 31 and above the horizontal height of the second rotating shaft 32 means that the horizontal height of the center line of the fourth rotating shaft 34 is above the horizontal height of the center line of the first rotating shaft 31 and above the horizontal height of the center line of the second rotating shaft 32.

[0079] The present utility model also provides a baby stroller, which includes a vehicle frame 100, a backrest arranged on the vehicle frame 100, a front wheel assembly 300 arranged at the lower part of the front bracket 11, and a rear wheel assembly 400 arranged at the bottom of the rear bracket 12. The specific structure of the vehicle frame 100 refers to the above embodiments. Since this baby stroller adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated here one by one.

[0080] When the children's bicycle frame is switched from the unfolded state to the folded state, the upper push rod 132 can be manually or otherwise flipped forward so that the upper push rod 132 approaches the lower push rod 131. Then, by pressing down the upper push rod 132, the upper push rod 132 and the lower push rod 131 can be made to approach the rear bracket 12 under the action of gravity, driving the first swing rod 14 to rotate. Under the rotation of the first swing rod 14, the four-bar linkage can be driven to rotate, causing the seat post 20 to flip upward and the backrest rod to flip downward. At the same time, the sliding sleeve on the connecting rod 15 slides downward relative to the front bracket 11, driving the front bracket 11 to approach the rear bracket 12 through the connecting rod 15, thus completing the folding of the bicycle frame 100. Among them, during the upward flipping process of the seat post 20, the backrest rod and the side of the backrest connected to the seat post 20 can be driven to flip upward, so that the folded backrest does not touch the ground. Without the need to break or slide the backrest, the space occupied by the backrest in the height direction can also be reduced, making the volume of the folded bicycle frame 100 smaller, achieving a full folding effect and being able to be carried onto an airplane.

[0081] The above description is only an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A frame having an unfolded state and a folded state, characterized in that: Including front bracket, rear bracket and push rod, Two of the three components of the front bracket, the rear bracket and the push rod are rotatably connected, and the third component is rotatably connected to at least one of the two components; The frame further comprises a linkage assembly, the linkage assembly comprising a sliding sleeve slidably arranged on the front bracket, a connecting rod rotatably mounted on the sliding sleeve, and a first swing rod movably connected to the connecting rod, an end of the connecting rod away from the sliding sleeve being rotatably arranged on the rear bracket, and an end of the first swing rod away from the connecting rod being movably connected to the push rod; when the push rod moves toward the rear bracket, the first swing rod drives the sliding sleeve to slide downward through the connecting rod to bring the front bracket and the rear bracket closer; The frame also has a seat rod, which is rotatably mounted on the rear bracket or the first swing arm. The linkage assembly also has a second swing arm movably connected to the seat rod, and the second swing arm cooperates with the sliding sleeve to drive the seat rod to flip upward when the sliding sleeve slides.

2. The frame according to claim 1, characterized in that: The first swing arm and the seat rod are rotatably mounted on a sixth rotating shaft, the second swing arm and the seat rod are rotatably mounted on a seventh rotating shaft, and the seventh rotating shaft is relatively arranged at the front side of the sixth rotating shaft.

3. The frame according to claim 2, characterized in that: The seventh rotating shaft is relatively arranged at one end of the seat post close to the front bracket.

4. The frame according to claim 2, characterized in that: One end of the second swing arm away from the seat rod is rotatably mounted on the fourth rotating shaft together with the connecting rod, and the seventh rotating shaft is located above and behind the fourth rotating shaft.

5. The frame according to any one of claims 1 to 4, characterized in that The frame also has a backrest rod, which is rotatably mounted on the seat rod. When the seat rod flips upward, it drives the backrest rod to flip downward.

6. The frame according to any one of claims 1 to 4, characterized in that: The rotational mounting position of the first swing arm and the connecting rod is arranged on the connecting rod at a position close to the rear bracket.

7. The frame according to claim 6, characterized in that: The first swing arm is rotatably connected to the connecting rod via a first rotating shaft, the connecting rod is rotatably connected to the front bracket via a second rotating shaft, the connecting rod is rotatably connected to the rear bracket via a third rotating shaft, and the first rotating shaft is located between the second rotating shaft and the third rotating shaft.

8. The frame according to claim 7, characterized in that: The level of the first rotating shaft is located above the level of the second rotating shaft and below the level of the third rotating shaft.

9. The frame according to any one of claims 1 to 4, characterized in that: The push rod comprises a rod body and a rotating joint arranged on the rod body; The rotating joint is rotatably connected to the front bracket or the rear bracket along an eighth rotating axis, and the first swing arm is rotatably connected to the rotating joint along a fifth rotating axis; In the unfolded state, the fifth rotating shaft is relatively arranged above and behind the eighth rotating shaft.

10. A baby stroller, characterized in that: The vehicle comprises a frame as claimed in any one of claims 1 to 9, a backrest arranged on the frame, a front wheel assembly arranged at the lower part of the front bracket, and a rear wheel assembly arranged at the bottom of the rear bracket.

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