Baby stroller

Abstract

The invention discloses a child stroller which comprises a stroller frame with an unfolded state and a folded state, the stroller frame comprises a front support, a rear support and a push rod assembly, the upper portion of the front support is rotationally connected with the upper portion of the rear support, the lower portion of the push rod assembly is slidably connected with the upper portion of the front support, and the child stroller further comprises a seat assembly arranged on the stroller frame. The seat assembly comprises a seat frame, a pull rope and a cloth cover, in the unfolded state, the pull rope is supported between the seat frame and the push rod assembly, the cloth cover is arranged between the pull rope and the seat frame, and a bearing space with a forward opening is defined by the cloth cover and the seat frame; in the process that the stroller is unfolded from the folded state, the push rod assembly is located at the unfolded position before the rear support. When the push rod assembly is completely unfolded, the pull rope is in a pre-tightening state; when the rear support rotates to the unfolding position relative to the front support, the rear support drives the pull rope to be tensioned to the tensioning state. The elasticity of the pull rope of the stroller does not affect the unfolding operation of the stroller, so that the unfolding operation of the stroller is time-saving and labor-saving.

Description

Technical Field

[0001] The present invention relates to the technical field of children's products, and in particular to a children's stroller. Background Art

[0002] When the Little Tiger cloth stroller is opened, when the push rod assembly is pulled to a certain extent, the locking mechanism of the stroller frame is difficult to lock. The operator needs to go around the front end of the stroller frame and apply a downward force to the seat rod to tighten the rope so that the stroller frame can be completely locked. This operation method is relatively cumbersome.

[0003] In order to ensure the rigidity of the entire stroller, the ropes that fix the cloth cover of similar stretched cloth strollers are stretched very tight. When the stroller frame is unfolded to a certain extent, the rope has reached a theoretical length. Because the rope itself has a certain elasticity, in order to fully unfold the stroller frame and lock the locking mechanism in place, it is necessary to overcome this part of the elastic force of the rope. At this time, a lot of force is required to fully unfold the stroller frame, which makes the unfolding operation of the stroller frame inconvenient, time-consuming and laborious. Summary of the invention

[0004] The purpose of the present invention is to address the deficiencies in the prior art and to provide a child stroller that can tighten a cloth cover by a drawstring and saves time and effort when the stroller frame is unfolded.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A child stroller, comprising a stroller frame with an unfolded state and a folded state, the stroller frame comprising a front bracket, a rear bracket and a push rod assembly, the upper portion of the front bracket is rotatably connected to the upper portion of the rear bracket, the lower portion of the push rod assembly is slidably connected to the upper portion of the front bracket, the child stroller further comprises a seat assembly arranged on the stroller frame, the seat assembly comprises a seat frame, a drawstring and a cloth cover, in the unfolded state, the drawstring is supported between the seat frame and the push rod assembly, the cloth cover is arranged between the drawstring and the seat frame, and the cloth cover and the seat frame enclose a bearing space that is open to the front; in the process of unfolding the child stroller from the folded state, the push rod assembly is in the unfolded position before the rear bracket;

[0007] When the push rod assembly is fully deployed, the pull rope is in a pre-tensioned state; when the rear bracket is rotated to an deployed position relative to the front bracket, the rear bracket drives the pull rope to be tensioned to a tensioned state.

[0008] In some embodiments, the first end of the pull rope is fixedly disposed on the seat frame, and the second end of the pull rope is wrapped around the upper portion of the push rod assembly and then cooperated with the rear bracket to move and tension the pull rope when the rear bracket moves toward the unfolded state.

[0009] In some embodiments, the upper portion of the rear bracket is provided with a bracket winding portion that can slide relative to the pull rope, and the second end of the pull rope is fixedly arranged on the seat frame after winding through the bracket winding portion;

[0010] Alternatively, the second end of the pull rope is fixedly arranged on the upper part of the rear bracket.

[0011] In some embodiments, the rear bracket is rotatably matched with the front bracket around a first axis, and a portion of the rear bracket extends upward to the other side of the first axis to form an extension portion, and the bracket winding portion is arranged on the extension portion.

[0012] In some embodiments, the first end of the pull rope is fixedly arranged on the front part of the seat frame, the rear part of the seat frame is provided with a seat frame winding part that can slide relative to the pull rope, and the upper part of the push rod assembly is provided with a push rod winding part that can slide relative to the pull rope; the second end of the pull rope is successively wound around the push rod winding part, the seat frame winding part and the bracket winding part and then fixedly arranged on the seat frame; or, the second end of the pull rope is successively wound around the push rod winding part and the seat frame winding part and then arranged on the upper part of the rear bracket.

[0013] The push rod surrounding portion is rotatably disposed on the push rod assembly, the seat frame surrounding portion is rotatably disposed on the seat frame, and the bracket surrounding portion is rotatably disposed on the rear bracket.

[0014] In some embodiments, the seat frame is movably arranged on the front support, and the seat assembly further comprises a linkage mechanism arranged between the seat frame and the rear support, wherein the linkage mechanism is movably connected to the rear support and the seat frame respectively, and when the rear support is folded toward the front support, the rear support drives the seat frame to be folded toward the front support through the linkage mechanism;

[0015] When the rear bracket rotates toward the unfolded position, the rear bracket drives the seat frame to move toward the unfolded position through the linkage mechanism;

[0016] When the rear bracket rotates toward the unfolded position, the bracket winding portion and the seat frame winding portion move in directions away from each other to tighten the drawstring;

[0017] The seat frame is rotatably connected to the front bracket via a second shaft, and in the unfolded state, the second shaft is arranged between the seat frame winding portion and the bracket winding portion;

[0018] The linkage mechanism comprises a connecting rod, one end of which is rotationally matched with the front part of the seat frame; and the other end of the connecting rod is rotationally matched with the upper part of the rear bracket.

[0019] In some embodiments, a first through hole is provided on the seat frame, and the pull rope extends from a fixed point on the seat frame to the left or right toward the outside of the seat frame, then passes through the first through hole, and then extends upward and moves around the push rod assembly; and / or, a second through hole is also provided on the seat frame, and the pull rope extends from the push rod assembly downward, passes through the second through hole, and then extends backward and moves around the rear part of the seat frame.

[0020] In some embodiments, the push rod assembly also includes a push handle located at the top, the push handle includes a cross bar and side bars respectively arranged at both ends of the cross bar, the rear bracket is respectively arranged on the left and right sides, the pull rope is respectively arranged on the left and right sides, the first end of the pull rope on each side is fixedly set on the corresponding side of the seat frame, and after sequentially moving around the side bar on the corresponding side and the upper part of the rear bracket on the corresponding side, the second end of the pull rope is fixedly set on the corresponding side of the seat frame; or, the first end of the pull rope on each side is fixedly set on the corresponding side of the seat frame, and after moving around the side bar on the corresponding side, the second end of the pull rope is fixedly set on the upper part of the rear bracket on the corresponding side.

[0021] In some embodiments, the front bracket includes a front support rod and a first connecting member fixedly arranged on the upper part of the front support rod, and the rear bracket is respectively arranged on the left and right sides, and the upper part of the rear bracket on each side is rotatably connected to the corresponding side part of the first connecting member, and the lower part of the push rod assembly is rotatably or slidably connected to the upper part of the front support rod.

[0022] In some embodiments, the push rod assembly includes an upper push rod and a lower push rod, the lower portion of the upper push rod is slidably connected to the upper portion of the lower push rod, the lower portion of the lower push rod is slidably connected to the upper portion of the front support rod, and the front support rod, the lower push rod and the upper push rod are all arc-shaped.

[0023] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: when the child stroller of the present invention is unfolded from the folded state, the push rod assembly is first slid relative to the front bracket to the unfolded position, and then the push rod assembly is pressed down to make the rear bracket and the front bracket rotate relative to each other to the unfolded position. When the push rod assembly slides relative to the front bracket to the unfolded position, the pull rope is in a pre-tightened state, and only when the rear bracket rotates in a direction away from the front bracket to continue to unfold the child stroller, the pull rope is fully tensioned, so that the elasticity of the pull rope does not affect the unfolding operation of the child stroller, making the unfolding operation of the entire child stroller save time and effort, and can be operated with one hand, which is convenient for the use of the child stroller. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Attached Figure 1 is a three-dimensional schematic diagram of the child stroller of this embodiment in the unfolded state (seen from the front to the back, with the cloth cover and the armrests removed);

[0025] Attached Figure 2 is a three-dimensional schematic diagram of the child stroller of this embodiment in the unfolded state (seen from the back to the front, with the cloth cover and armrests removed);

[0026] Attached Figure 3 The figure is a front view schematic diagram of the child stroller of this embodiment in the unfolded state (without the cloth cover and the armrest);

[0027] Attached Figure 4 For attachment Figure 3 A schematic cross-sectional view along line AA;

[0028] Attached Figure 5 is a three-dimensional schematic diagram of the child stroller of this embodiment in the unfolded state (without the armrests);

[0029] Attached Figure 6 This is a three-dimensional schematic diagram of the child stroller of this embodiment during the unfolding process (the pull rope is in a pre-tightened state, viewed from the front to the back, with the cloth cover and the armrest removed);

[0030] Attached Figure 7 This is a three-dimensional schematic diagram of the child stroller of this embodiment during the unfolding process (the pull rope is in a pre-tightened state, viewed from the back to the front, with the cloth cover and armrests removed);

[0031] Attached Figure 8 This is a front view schematic diagram of the child stroller of this embodiment during the unfolding process (the drawstring is in a pre-tightened state, and the cloth cover and armrests are removed);

[0032] Attached Fig. 9 For attachment Figure 8 A schematic cross-sectional view along line AA;

[0033] Attached Fig.10 This is a partially exploded schematic diagram of the child stroller of this embodiment (the cloth cover and the armrest are removed, and the push rod winding portion can slide relative to the side rod);

[0034] Attached Fig.11 For attachment Fig.10 A partial enlarged schematic diagram in the middle;

[0035] Attached Fig.12 This is a front view schematic diagram of the child stroller of this embodiment (the cloth cover and the armrest are removed, the push rod winding portion can slide relative to the side rod, and the pull rope is in a natural state);

[0036] Attached Fig.13 For attachment Fig.12 A schematic cross-sectional view along line AA;

[0037] Attached Fig.14 For attachment Fig.13 A partial enlarged schematic diagram in the middle;

[0038] Attached Fig.15 This is a front view schematic diagram of the child stroller of this embodiment (the cloth cover and the armrest are removed, the push rod winding portion can slide relative to the side rod, and the pull rope is in a tensioned state);

[0039] Attached Fig.16 For attachment Fig.15 A schematic cross-sectional view along line AA;

[0040] Attached Fig.17 For attachment Fig.16 A partial enlarged schematic diagram in the middle.

[0041] Attached Fig.18 is a three-dimensional schematic diagram of the child stroller of this embodiment after the armrest is removed from the cloth cover;

[0042] Attached Fig.19 For attachment Fig.18 A partial enlarged schematic diagram in the middle;

[0043] Attached Fig. 20 is a three-dimensional schematic diagram of the child stroller of this embodiment after the armrest is installed on the cloth cover;

[0044] Attached Fig.21 is a side view schematic diagram of the child stroller of this embodiment after the armrest is installed on the cloth cover;

[0045] Attached Fig. 22 is a three-dimensional schematic diagram of the handrail of this embodiment (enlarged view);

[0046] Attached Fig.23 The figure is a three-dimensional schematic diagram of the child stroller of this embodiment during the folding process (without the cloth cover, drawstring and armrest);

[0047] Attached Fig.24 The figure is a side view of the stroller of the present embodiment during folding (without the cloth cover, drawstring and armrest);

[0048] Attached Fig.25 is a three-dimensional schematic diagram of the child stroller of this embodiment in a folded state (without the cloth cover, drawstring and armrests);

[0049] Attached Fig.26 The figure is a side view of the child stroller of this embodiment in a folded state (without the cloth cover, drawstring and armrests).

[0050] Among them: 11, front bracket; 111, front support rod; 112, first connecting member; 113, second connecting member; 113a, convex part; 114, limit part; 12, rear bracket; 13, push rod assembly; 131, upper push rod; 132, lower push rod; 133, push handle; 1331, cross bar; 1332, side bar; 1332a, third through hole; 1332b, guide groove; 14, connecting rod; 15, rear cross bar; 16, first axis; 2, seat frame; 21, third connecting member; 22, fourth connecting member; 23. First through hole; 24. Second through hole; 25. Second axis; 31. Front wheel assembly; 32. Rear wheel assembly; 41. Cloth cover; 411. Side; 411a. Bottom; 411b. Top; 411c. Bevel; 42. Pull rope; 51. Push rod winding portion; 511. Slot; 52. Bracket winding portion; 53. Seat frame winding portion; 61. Driving member; 62. Nut 7. Handrail; 71. Plug-in portion; 711. Chamfered portion; 8. Mounting portion; 81. Plug-in slot; 9. Locking member; 91. Recess. DETAILED DESCRIPTION

[0051] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0052] In the following description, the directions such as "front", "back", "left", "right", "up", and "down" are all based on Figure 4 , the left side direction in the figure is "front", the right side direction is "back", the upper side direction is "up", the lower side direction is "down", and the directions perpendicular to the paper plane in the figure are "left" and "right". The definitions of the above directions are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0053] like Figure 1 to Figure 26 As shown, the child stroller of the present invention comprises a stroller frame, a seat assembly arranged on the stroller frame, a front wheel assembly 31 arranged at the bottom front portion of the stroller frame, and a rear wheel assembly 32 arranged at the bottom rear portion of the stroller frame.

[0054] The cart frame includes a front bracket 11, a rear bracket 12 and a push rod assembly 13. The front wheel assembly 31 is arranged at the lower part of the front bracket 11, and the rear wheel assembly 32 is arranged at the lower part of the rear bracket 12. The upper part of the rear bracket 12 is rotatably connected with the upper part of the front bracket 11 around the first axis 16. The lower part of the push rod assembly 13 is slidably connected with the upper part of the front bracket 11, so that the push rod assembly 13 can be slidably arranged relative to the front bracket 11 along the length extension direction of the front bracket 11.

[0055] In this embodiment, the front support 11 includes a front support rod 111 and a first connecting member 112. The front support rod 111 is located in the middle of the child stroller in the left-right direction. When the stroller frame is in the unfolded state, the front support rod 111 extends upward from the front to the rear, and the front wheel assembly 31 is arranged at the lower part of the front support rod 111. The first connecting member 112 is fixedly arranged at the upper part of the front support rod 111. The rear support 12 is respectively arranged on the left and right sides of the first connecting member 112, and the upper part of the rear support 12 on each side is respectively rotatably connected with the corresponding side part of the first connecting member 112 around the first axis 16, and the rear wheel assembly 32 is respectively arranged at the lower part of the rear support 12 on each side.

[0056] Preferably, the front strut 111 has a lumen extending along its length, and the push rod assembly 13 can be slidably disposed in the lumen of the front strut 111 along the length extension direction of the lumen of the front strut 111. The upper and lower ends of the lumen of the front strut 111 are open, so that the upper part of the push rod assembly 13 extends to the outside of the upper part of the lumen, and the lower part of the push rod assembly 13 can be retracted into the lumen, or can be extended to the outside of the lumen toward the lower part of the lumen.

[0057] The push rod assembly 13 may include a rod member, or may include a telescopic rod body, wherein the telescopic rod body is composed of a plurality of rod members that are sequentially slidably connected.

[0058] In this embodiment, the telescopic rod body includes an upper push rod 131 and a lower push rod 132. The lower push rod 132 has a lumen extending along its length direction, and the upper push rod 131 can be slidably disposed in the lumen of the lower push rod 132 along the length extension direction of the lumen of the lower push rod 132. The lower push rod 132 can be slidably disposed in the lumen of the front support rod 111 along the length extension direction of the lumen of the front support rod 111, and the lower portion of the lower push rod 132 can extend from the lower portion of the lumen of the front support rod 111 to the outside of the lumen.

[0059] The push rod assembly 13 also includes a push handle 133, and the upper end of the telescopic rod body is fixedly arranged in the middle of the push handle 133. Specifically, the push handle 133 includes a cross bar 1331 extending in the left-right direction and side bars 1332 extending forward from the left and right ends of the cross bar 1331. The upper end of the upper push rod 131 is fixedly arranged in the middle of the cross bar 1331.

[0060] The seat assembly is for children to sit on, and the seat assembly includes a seat frame 2 for children to sit on, and the seat frame 2 is movably arranged on the front bracket 11. The seat assembly also includes a linkage mechanism, and the linkage mechanism is arranged between the seat frame 2 and the rear bracket 12, and the linkage mechanism is movably connected to the rear bracket 12 and the seat frame 2 respectively. When the rear bracket 12 is folded toward the front bracket 11, the rear bracket 12 drives the seat frame 2 to be folded toward the front bracket 11 through the linkage mechanism. When the rear bracket 12 rotates toward the unfolded position, the rear bracket 12 drives the seat frame 12 to move toward the unfolded position through the linkage mechanism. In this way, when the child stroller is unfolded or folded, the seat frame 2 can be rotated relative to the front bracket 11 through the rotation of the rear bracket 12, and there is no need to rotate the seat frame 2 relative to the front bracket 11 separately, so that the folding and unfolding operations of the child stroller are convenient.

[0061] Specifically, the linkage mechanism includes a connecting rod 14. The rear portion of the seat frame 2 is rotatably connected to the upper portion of the front bracket 11 around the second axis 25. One end of the connecting rod 14 is rotatably connected to the upper portion of the rear bracket 12. Specifically, a portion of the rear bracket 12 extends upward to the other side of the first axis 16 to form an extension portion, and one end of the connecting rod 14 is rotatably connected to the extension portion of the rear bracket 12; the other end of the connecting rod 14 is rotatably connected to the front portion of the seat frame 2. In this way, a four-bar linkage is formed between the front bracket 11, the seat frame 2, the connecting rod 14 and the rear bracket 12. When the rear bracket 12 rotates relative to the front bracket 11, the seat frame 2 can be synchronously rotated relative to the front bracket 11.

[0062] In this embodiment, a second connecting member 113 is fixedly provided on the upper portion of the front support rod 111, and the second connecting member 113 is located above the first connecting member 112. The connecting rods 14 are respectively provided on the left and right sides. The left and right sides of the front portion of the seat frame 2 are respectively provided with third connecting members 21 extending downward from the bottom of the seat frame 2, and the middle portion of the rear portion of the seat frame 2 is provided with a fourth connecting member 22 extending downward from the bottom of the seat frame 2. The second connecting member 113 is rotatably connected to the fourth connecting member 22 around the second axis 25, one end of the connecting rod 14 on each side is rotatably connected to the upper portion of the rear support 12 on the corresponding side, and the other end of the connecting rod 14 is rotatably connected to the third connecting member 21 on the corresponding side.

[0063] The seat assembly further includes a cloth cover 41 and a drawstring 42. When the stroller is in the unfolded state, the drawstring 42 is supported between the seat frame 2 and the push rod assembly 13. The cloth cover 42 is disposed between the drawstring 41 and the seat frame 2, and together with the seat frame 2, forms a bearing space that is open toward the front. When the stroller is in the unfolded state, the drawstring 42 is in a taut state, so that the cloth cover 41 can be straightened without wrinkles, making the appearance of the stroller beautiful.

[0064] Specifically, the pull cord 42 is disposed between the seat frame 2 and the side rod 1332 of the push handle 133, one end of the pull cord 42 is fixedly disposed on the seat frame 2, and the other end of the pull cord 42 is wound around the side rod 1332 and is disposed in cooperation with the rear support 12. When the push rod assembly 13 slides to the unfolded position relative to the front support 11 during the process of unfolding the stroller from the folded state, the pull cord 42 is in a pre-tightened state, such as Figures 4 to 9 As shown, this makes the deployment operation of the push rod assembly 13 labor-saving and can be operated with one hand; when the push rod assembly 13 is deployed, when the push rod assembly 13 is pressed down, the rear bracket 12 and the front bracket 11 are relatively rotated, and when the rear bracket 12 is in the deployed position, the pull rope 42 is in a tensioned state, as shown in FIG. Figure 1 to Figure 5 As shown, this makes it easier to unfold the stroller from a folded state.

[0065] In this embodiment, a setting method of the pull rope 42 is provided, but the setting method of the pull rope 42 is not limited to this embodiment. The specific setting method of the pull rope 42 in this embodiment is:

[0066] like Figure 2 , Figure 4 , Figure 7 and Fig. 9 As shown, one end of the pull cord 42 is fixedly set at the bottom front part of the seat frame 2, and the pull cord 42 extends upward from the bottom front part of the seat frame 2, and then moves around the upper part of the side rod 1332 and then extends downward, and then the pull cord 42 moves around the upper part of the rear bracket 12, and then the other end of the pull cord 42 is fixedly set at the bottom rear part of the seat frame 2. Alternatively, after the pull cord 42 moves around the upper part of the side rod 1332 and extends downward, the pull cord 42 can also be made to move around the upper part of the rear bracket 12 without moving, and the other end of the pull cord 42 can be directly fixedly set at the upper part of the rear bracket 12. It is preferred to adopt the former solution, so that when the child stroller is unfolded, the movement stroke of the pull cord 42 can be increased, making the unfolding operation of the child stroller easier.

[0067] like Figure 4 and Fig. 9 As shown, the stroller further includes a push rod winding portion 51 and a bracket winding portion 52. The push rod winding portion 51 is disposed on the side rod 1332. The bracket winding portion 52 is disposed on the upper portion of the rear bracket 12, and specifically, the bracket winding portion 52 is disposed on the extension portion of the rear bracket 12. After the pull cord 42 extends upward from the bottom of the seat frame 2, the pull cord 42 is sequentially moved around the push rod winding portion 51 and the bracket winding portion 52, and then fixed to the seat frame 2.

[0068] Preferably, the push rod winding portion 51 is rotatably connected to the side rod 1332, and the bracket winding portion 52 is rotatably connected to the upper portion of the rear bracket 12. The push rod winding portion 51 and the bracket winding portion 52 can be rollers or rotating shafts, such as Figure 4 and Fig. 9When the child stroller is unfolded, when the pull cord 42 moves relative to the side rod 1332 and the rear bracket 12, the push rod winding portion 51 can be rotated relative to the side rod 1332, and the bracket winding portion 52 can be rotated relative to the rear bracket 12, so that the pull cord 42 and the push rod winding portion 51, and the pull cord 42 and the bracket winding portion 52 are in rolling contact, which can reduce the friction between the two, reduce the wear of the pull cord 42, and make the movement of the pull cord 42 smoother, less likely to get stuck, so that the unfolding operation of the child stroller is more labor-saving.

[0069] After the pull rope 42 moves around the upper part of the side rod 1332 and extends downward, it can also move around the seat frame 2 first, and then move around the upper part of the rear bracket 12 or be fixed on the upper part of the rear bracket 12. In this way, the direction of the pull rope 42 can be guided, making the movement of the pull rope 42 smoother.

[0070] Specifically, Figure 4 and Fig. 9 As shown, the child stroller further includes a seat frame winding portion 53. The seat frame winding portion 53 is arranged at the rear of the seat frame 2, and the pull cord 42 movably winds around the seat frame winding portion 53. Preferably, the seat frame winding portion 53 is rotatably connected to the seat frame 2, and the seat frame winding portion 53 can also be a roller and a rotating shaft. During the unfolding process of the child stroller, when the pull cord 42 moves relative to the seat frame 2, the seat frame winding portion 53 can be rotated relative to the seat frame 2, so that the pull cord 42 and the seat frame winding portion 53 are also in rolling contact, which can also reduce the friction between the two.

[0071] When the stroller is in the unfolded state, the second shaft 25 is disposed between the seat frame surrounding portion 53 and the bracket surrounding portion 52 .

[0072] like Figure 2 and Figure 7 As shown, the front part of the seat frame 2 is also provided with a first through hole 23, and the first through hole 23 penetrates the upper and lower end surfaces of the seat frame 2. The pull rope 42 extends from the fixed point at the bottom of the seat frame 2 to the left or right and to the outside of the seat frame 2, then passes through the first through hole 23, and then extends upward and moves around the side rod 1332, and then extends downward. By providing the first through hole 23 on the seat frame 2 and passing the pull rope 42 through the first through hole 23, the direction of the pull rope 42 can be guided.

[0073] like Figure 2 and Figure 7 As shown, the bottom of the rear portion of the seat frame 2 is further provided with a second through hole 24, and after the pull rope 42 extends downward from the side rod 1332 and passes through the second through hole 24, the pull rope 42 extends backward and moves around the rear portion of the seat frame 2. By providing the second through hole 24 on the seat frame 2 and passing the pull rope 42 through the second through hole 24, the direction of the pull rope 42 can also be guided.

[0074] In this embodiment, Figure 1 , Figure 2 , Figure 5 to Figure 7 As shown, the pull rope 42 is respectively arranged on the left and right sides, and the push rod winding part 51 is respectively rotatably arranged on the side rods 1332 on the left and right sides. The bracket winding part 52 is respectively rotatably arranged on the upper part of the rear bracket 12 on each side. The seat frame winding part 53 is respectively rotatably arranged on the left and right sides of the rear part of the seat frame 2. One end of the pull rope 42 on each side is fixedly arranged on the corresponding side of the seat frame 2, passes through the first through hole 23 and extends upward, then flexibly wraps around the push rod winding part 51 on the corresponding side and extends downward, then passes through the second through hole 24 and extends backward, then flexibly wraps around the seat frame winding part 53 on the corresponding side and extends forward, then flexibly wraps around the bracket winding part 52 on the corresponding side, and the other end of the pull rope 42 is fixedly arranged on the corresponding side of the seat frame 2. Alternatively, the pull rope 42 flexibly wraps around the seat frame winding part 51 on the corresponding side and extends forward, so that the other end of the pull rope 42 is directly fixedly arranged on the upper part of the rear bracket 12 on the corresponding side.

[0075] Preferably, one or more of the push rod winding portion 51, the bracket winding portion 52 and the seat frame winding portion 53 can slide relative to the components on which they are arranged to adjust the position, so that the pull rope 42 can move synchronously to change the length of the pull rope 42, thereby adjusting the tightness of the pull rope 42.

[0076] The following description will be made by taking the push rod winding portion 51 being able to slide relative to the side rod 1332 as an example. Fig.10 , Fig.11 , Fig.13 , Fig.14 , Fig.16 and Fig.17 As shown, the side bar 1332 is provided with a third through hole 1332a, and after the pull rope 42 is sleeved on the push rod winding portion 51, both ends of the pull rope 42 pass through the third through hole 1332a at the same time and extend downward respectively. When the push rod winding portion 51 moves relative to the side bar 1332, the length of the pull rope 42 between the third through hole 1332a and the push rod winding portion 51 can be changed, thereby achieving the effect of adjusting the tightness of the pull rope 42.

[0077] The push rod winding portion 51 and the pull rope 42 cooperate in the following manner: a slot 511 is provided on the push rod winding portion 51, and the pull rope 42 is movably provided in the slot 511. Fig.13 , Fig.14 , Fig.16 and Fig.17 Such a matching mode makes it difficult for the pull rope 42 to escape from the slot 511, so as to ensure that when the push rod winding portion 51 moves relative to the cart frame, the pull rope 42 is driven to move synchronously.

[0078] The side rod 1332 is also provided with a guide groove 1332b that matches with the push rod winding portion 51. The guide groove 1332b extends along the sliding direction of the push rod winding portion 51, that is, extends along the front-back direction. The push rod winding portion 51 can be slidably arranged in the guide groove 1332b along the length extension direction of the guide groove 1332b. Fig.13 , Fig.14 , Fig.16 and Fig.17 shown.

[0079] The third through hole 1332a is connected to the guide groove 1332b, and the third through hole 1332a can be close to the front end of the guide groove 1332b. Fig.13 , Fig.14 , Fig.16 and Fig.17 Thus, when the push rod winding portion 51 slides backward along the guide groove 1332b, the length of the pull rope 42 between the third through hole 1332a and the push rod winding portion 51 increases, so that the pull rope 42 is tensioned. Conversely, when the push rod winding portion 51 slides forward along the guide groove 1332b, the length of the pull rope 42 between the third through hole 1332a and the push rod winding portion 51 decreases, so that the pull rope 42 is loosened.

[0080] Of course, the third through hole 1332a can also be set close to the rear end of the guide groove 1332b, so that when the push rod winding portion 51 slides forward along the guide groove 1332b, the pull rope 42 is tightened; when the push rod winding portion 51 slides backward along the guide groove 1332b, the pull rope 42 is relaxed.

[0081] The child stroller also includes a driving member 61, which is rotatably or slidably arranged on the side rod 1332. The driving member 61 cooperates with the push rod winding portion 51. When the driving member 61 rotates or slides relative to the side rod 1332, the push rod winding portion 51 is driven to slide and adjust its position relative to the side rod 1332 through the cooperation relationship between the driving member 61 and the push rod winding portion 51.

[0082] The driving member 61 is rotatably disposed on the side rod 1332 , and the push rod surrounding portion 51 is moved relative to the side rod 1332 by rotating the driving member 61 relative to the side rod 1332 .

[0083] Specifically, Fig.13 , Fig.14 , Fig.16 and Fig.17 As shown, the driving member 61 can be a screw rod, which is rotatable around its own axis and arranged on the side rod 1332. A nut 62 is fixedly arranged in the push rod winding portion 51, and the screw rod and the nut 62 are connected by threaded cooperation. When the screw rod is operated to rotate around its own axis, the nut 62 is driven to move along the axis direction of the screw rod, thereby driving the push rod winding portion 51 to move in the same direction to adjust the position.

[0084] In other embodiments, the driving member 61 may also be slidably disposed on the cart frame, and the driving member 61 and the push rod winding portion 51 are matched with each other through an inclined surface.

[0085] like Fig.18 , Fig. 20 and Fig.21 As shown, the baby stroller may further include an armrest 7 , which is detachably disposed on the cloth cover 41 .

[0086] By arranging the armrest 7 on the cloth cover 41 , when a child is sitting in the seating space, the child can be prevented from slipping out of the seating space, so that the armrest 7 can be used to provide safety protection for the child.

[0087] In addition, the armrest 7 is detachably connected to the cloth cover 41. When the armrest 7 is not needed, the armrest 7 can be removed from the cloth cover 41, which makes the appearance of the stroller simple and beautiful, and avoids the problem that the armrest 7 is connected to the cloth cover 41 and may affect the use of the stroller.

[0088] The armrest 7 is made of a hard material, which can prevent the child from slipping out of the seat and provide safety protection for the child. The armrest 7 can also allow the child to lean on it to sleep when tired and sleepy, which can improve comfort and make the overall aesthetics of the child stroller better. The armrest 7 is preferably a hard plastic part.

[0089] The cloth cover 41 is provided with a mounting portion 8, and the armrest 7 is detachably provided on the mounting portion 8. Specifically, as Fig.18 , Fig.19 and Fig. 22 As shown, the mounting portion 8 is provided with an inserting groove 81 , and the armrest 7 has an inserting portion 71 , which matches with the inserting groove 81 , and the inserting portion 71 can be inserted into the inserting groove 81 or removed from the inserting groove 81 .

[0090] like Fig. 22 As shown, chamfered portions 711 are provided on opposite sides of the end of the plug-in portion 71 , so as to facilitate the plug-in portion 71 to be inserted into the plug-in slot 81 .

[0091] The cloth cover 41 has a pair of side surfaces 411 respectively arranged on the left and right sides of the seating space, and the mounting portion 8 is respectively arranged on the side surfaces 411 on each side. The armrest 7 is a U-shaped structure with the opening facing backward, and the plug-in portions 71 are respectively arranged at the two ends of the armrest 7. When the armrest 7 is installed on the cloth cover 41, the plug-in portions 71 on each side are respectively inserted into the plug-in grooves 81 on the corresponding side, such as Fig. 20 and Fig.21 shown.

[0092] like Fig.18 , Fig. 20 and Fig.21As shown, each side 411 of the cloth cover 41 has a bottom edge 411a and a top 411b. The bottom edge 411a of the cloth cover 41 is arranged at the position of the seat frame 2, and the top 411b of the side 411 is arranged at the position of the side rod 1332 of the push handle 133.

[0093] The length of the bottom edge 411a of the side 411 extending in the front-to-back direction is approximately equal to the length of the seat frame 2 extending in the front-to-back direction. The approximately equal mentioned here means that the two are exactly the same, or the length of the bottom edge 411a extending in the front-to-back direction is slightly smaller than the length of the seat frame 2 extending in the front-to-back direction.

[0094] On each side 411, the length of the side 411 extending in the front-to-back direction gradually decreases from the bottom 411a to the top 411b. The mounting portion 8 is arranged at a position close to the bottom 411a of the side 411, and the direction in which the mounting portion 8 extends obliquely intersects with the bottom 411a, and one end of the mounting portion 8 extends in a direction close to the rear end of the seat frame 2. In this way, the length of the mounting portion 8 can be increased, thereby increasing the matching length between the plug-in portion 71 and the plug-in slot 81, so that the stability of the armrest 7 when installed on the cloth cover 41 is better, so as to better support and protect the child.

[0095] like Fig.18 , Fig. 20 and Fig.21 As shown, the side surface 411 of each side also has an oblique edge 411c extending between the side rod 1332 and the front end of the seat frame 2, and at least the oblique edge 411c is arranged on the pull rope 42. The other end of the mounting portion 8 is extended to the position of the oblique edge 411c and arranged on the pull rope 42, so that the rigidity and stability of the handrail 7 after being installed on the mounting portion 8 can be better.

[0096] In a specific embodiment, the mounting portion 8 is a hard material piece fixedly arranged on each side surface 411. The mounting portion 8 is in the form of a hard material piece so that the rigidity and stability of the connection between the handrail 7 and the mounting portion 8 are better. The mounting portion 8 is preferably a hard plastic piece.

[0097] Preferably, the mounting portion 8 is disposed on the side of the side surface 411 facing the seating space, so that the appearance of the child stroller is neat and beautiful.

[0098] In another embodiment, the mounting portion 8 can also be made of the same material as the cloth cover 41. In this case, the mounting portion 8 can be made integrally with the cloth cover 41, or the mounting portion 8 can be sewn on the side of the cloth cover 41 facing the seating space. When the mounting portion 8 is made of the same material as the cloth cover 41, the manufacturing process is simple and the cost is low.

[0099] The stroller further includes a locking structure. When the armrest 7 is mounted on the mounting portion 8, the relative position between the armrest 7 and the mounting portion 8 is locked by the locking structure. The locking structure is respectively arranged between the mounting portion 8 and the plug-in portion 71 on each side. After the locking structures on both sides are unlocked, the armrest 7 can be removed from the mounting portion 8.

[0100] Preferably, the locking structure is disposed at the position of the bevel 411 c of the side surface 411 of the mounting portion 8 close to the cloth cover 41 , so that it is easy to operate the locking structure to lock or unlock the locking structure.

[0101] The locking structure can adopt structures such as large white buckles, snap buckles, etc. that cooperate with each other.

[0102] The push rod assembly 13 further includes a locking member 9, which is used to lock the relative positions of the upper push rod 131 and the lower push rod 132. In this embodiment, the locking member 9 is rotatably arranged on the lower push rod 132. When the locking member 9 is in a locked state, the locking member 9 abuts against the upper push rod 131, thereby offsetting the radial clearance between the upper push rod 131 and the lower push rod 132, thereby preventing the upper push rod 131 and the lower push rod 132 from shaking. Figure 2 and Figure 4 shown.

[0103] The push rod assembly 13 can also lock the axial position between the upper push rod 131 and the lower push rod 132 through another locking member, so that the two cannot slide relative to each other. When the locking member 9 is unlocked, the other locking member can be unlocked to allow the upper push rod 131 and the lower push rod 132 to slide relative to each other, which can improve the safety performance of the child stroller and prevent the lock between the upper push rod 131 and the lower push rod 132 from being unlocked due to misoperation, causing relative sliding between the two.

[0104] When the stroller is in the folded state, the locking member 9 can cooperate with the front bracket 11, thereby locking the positions of the front bracket 11 and the lower push rod 132, so that the stroller can be in a stable folded state without automatically unfolding. Fig.25 and Fig.26 shown.

[0105] Specifically, the front bracket 11 is provided with a convex portion 113a, and the locking member 9 is provided with a concave portion 91 that matches the convex portion 113a. Figure 1 , Figure 2 , Figure 5 to Figure 7 When the stroller is in the folded state, the locking member 9 is in the locked state, and the protrusion 113a is inserted into the recess 91, thereby locking the front bracket 11 and the lower push rod 132. Fig.25 and Fig.26When the locking member 9 is rotated relative to the lower push rod 132 to unlock the locking member 9, the convex portion 113a can be disengaged from the concave portion 91. When the locking member 9 is rotated relative to the lower push rod 132 to lock the locking member 9, the convex portion 113a can be inserted into the concave portion 91.

[0106] The stroller also includes a first locking mechanism. When the stroller frame is in the unfolded state, the relative position of the front bracket 11 and the lower push rod 132 is locked by the first locking mechanism. When the upper push rod 131 slides relative to the lower push rod 132 when the stroller is folded, the first locking mechanism can be driven to unlock. In this way, the unlocking operation of the first locking mechanism is convenient, and no separate operation is required, which facilitates the folding of the stroller. The specific structure of the first locking mechanism and the structure for driving the first locking mechanism to unlock can both adopt the structure in the prior art.

[0107] The stroller also includes a second locking mechanism. When the stroller frame is in the unfolded state, the second locking mechanism is used to lock the relative position of the front bracket 11 and the rear bracket 12, thereby locking the position of the four-bar linkage formed between the front bracket 11, the seat frame 2, the connecting rod 14 and the rear bracket 12. When the push rod 132 slides relative to the front bracket 11 when the stroller is folded, the second locking mechanism can be driven to unlock. This makes the unlocking operation of the second locking mechanism convenient, without the need for separate operation, and facilitates the folding of the stroller. The specific structure of the second locking mechanism and the structure that drives the second locking mechanism to unlock can both adopt the structure in the prior art.

[0108] like Figure 5 As shown, the stroller frame further includes a rear crossbar 15 connected between the lower parts of the left and right rear brackets 12, and the front wheel assembly 31 is located between the left and right rear wheel assemblies 32 and in front of the rear crossbar 15. Preferably, the front wheel assembly 31 can be rotatably arranged on the front bracket 11 around a rotating shaft extending in the up-down direction, so that when the child stroller is folded, the front wheel assembly 31 can rotate relative to the front bracket 11, so that the plane where the front wheel assembly 31 is located is approximately parallel to the central axis of the rear crossbar 15, so that the front wheel assembly 31 can be closer to the rear crossbar 15, so that the front bracket 11 can be closer to the rear bracket 12, thereby reducing the structural volume of the child stroller after folding.

[0109] When the stroller is in the unfolded position, Figure 1 to Figure 5As shown, each locking member, the first locking mechanism and the second locking mechanism on the push rod assembly 13 are in a locked state. Most of the upper push rod 131 extends from the upper end of the lumen of the lower push rod 132 to the outside of the lumen of the lower push rod 132, and most of the lower push rod 132 extends from the upper end of the lumen of the front support rod 111 to the outside of the lumen of the front support rod 111. The lower part of the lower push rod 132 is located in the lumen of the front support rod 111 and does not extend outside the lumen. The pull rope 42 is in a taut state to make the cloth cover 41 flat. The upper push rod 131, the lower push rod 132 and the front support rod 111 are all arc-shaped, and the arc is arched in the direction away from the seat frame 2, and the curvature radius of the arc is 0.3 to 5m. The preferred curvature radius is 0.4 to 1m. In this way, compared with the straight rod-shaped upper push rod 131, the lower push rod 132 and the front support rod 111, the inclination degree of the stretcher 42 can be reduced, thereby improving the comfort of the seat assembly when riding. Moreover, when the angle between the front support 11 and the rear support 12 is large, in this embodiment, the angle between the front support 11 and the rear support 12 is greater than 90 degrees, compared with the straight rod-shaped upper push rod 131, the lower push rod 132 and the front support rod 111, the angle of its backward inclination can be reduced, thereby avoiding the problem that the center of gravity of the child stroller moves backward and causes the child stroller to overturn. In addition, the length of the push rod assembly 13 can also be reduced to reduce the structural volume of the child stroller, while also making the child stroller beautiful in appearance. The height of the center of the seat frame 2 from the ground is 0.25-0.55m, and the preferred height is 0.3-0.45m. The higher the height of the center of the seat frame 2 from the ground, the larger the curvature radius of the corresponding arc of the upper push rod 131, the lower push rod 132 and the front support rod 111.

[0110] When the stroller is folded, after the locks between the upper push rod 131 and the lower push rod 132 are completely unlocked, the upper push rod 131 slides downward until most of it is retracted into the tube cavity of the lower push rod 132, and the first locking mechanism is unlocked at the same time; the push rod assembly 13 slides downward as a whole until most of the upper part of the telescopic rod body is retracted into the tube cavity of the front support rod 111, and the second locking mechanism is unlocked at the same time. The front wheel assembly 31 rotates relative to the front bracket 11 around the rotating shaft extending in the up-down direction, so that the rear bracket 12 rotates forward and gradually approaches the front bracket 11, and the seat frame 2 is pulled downward by the connecting rod 14 to gradually rotate and approach the front bracket 11. During this process, the pull rope 42 gradually loosens. Fig.23 and Fig.24 shown.

[0111] When the stroller is in the folded state, the plane where the front wheel assembly 31 is located is approximately parallel to the central axis of the rear crossbar 15, so that the various rods that make up the stroller frame are closely together, and the lower portion of the lower push rod 132 extends downward to the outside of the tubular cavity of the front support rod 111, so that the lower portion of the lower push rod 132, the front wheel assembly 31 and / or the rear wheel assembly 32 can be supported on the ground together, so that the stroller can stand on the ground after being folded, which is convenient for carrying and storing the stroller. In this embodiment, when the stroller is in the folded state, the lower end of the front wheel assembly 31 is located above the lower end of the rear wheel assembly 32, and the lower portion of the lower push rod 132 and the rear wheel assemblies 32 on the left and right sides are supported on the ground together, and the rear wheel assemblies 32 on the left and right sides and the lower portion of the lower push rod 132 are sequentially connected to form a triangular structure, so that the stroller has better stability after being folded, and can stand on the ground without being easy to tip over. Fig.25 and Fig.26 shown.

[0112] When the stroller is unfolded from the folded state, the push rod assembly 13 slides upward relative to the front support rod 111 until most of it extends out of the tube cavity of the front support rod 111, and the upper push rod 131 slides upward relative to the lower push rod 132 until most of it extends out of the tube cavity of the lower push rod 132. During this process, the pull rope 42 is gradually stretched. When the push rod assembly 13 is in the unfolded position, the pull rope 42 is in a pre-tightened state. When the pull rope 42 is stretched to the pre-tightened state, it can drive the seat frame 2 to rotate, thereby linking the rear bracket 12 and the front bracket 11 to rotate relative to each other. When the push rod assembly 13 is in the unfolded position, a first angle is formed between the front bracket 11 and the rear bracket 12, such as Figures 4 to 9 As shown. Then, when the push rod assembly 13 is pressed down, the rear bracket 12 and the front bracket 11 are rotated relative to each other and unfolded, and the seat frame 2 is driven by the connecting rod 14 to gradually rotate upward away from the front bracket 11. In this process, the pull rope 42 moves relative to the push rod assembly 13, the seat frame 2 and the rear bracket 12 as the rear bracket 12 rotates, and its stroke still changes, so that the elasticity of the pull rope 42 will not affect the unfolding operation of the child stroller, so that the rear bracket 12 and the front bracket 11 can continue to rotate relative to each other until they move to the unfolded position, and the seat frame 2 can continue to rotate upward until they move to the unfolded position. When the front bracket 11, the rear bracket 12 and the seat frame 2 all move to the unfolded position, at this time, a second angle is formed between the front bracket 11 and the rear bracket 12, and the second angle is greater than the first angle.

[0113] A limiting portion 114 is provided on the front support 11. When the stroller is unfolded from a folded state and the rear support 12 rotates away from the front support 11, the limiting portion 114 limits the rotation of the rear support 12, thereby limiting the rear support 12 to the unfolded position of the stroller.

[0114] like Figure 7As shown, the limiting parts 114 are respectively arranged on the left and right sides of the first connecting member 112, and protrude outward from the left side or the right side of the first connecting member 112, respectively. The limiting parts 114 are located on the rotation path of the rear bracket 112 rotating in the direction away from the front bracket 11. When the cart frame is in the unfolded state, the limiting parts 114 are abutted and matched with the rear bracket 12, thereby blocking the rotation of the rear bracket 12, so that the rear bracket 12 cannot continue to rotate in the direction away from the front bracket 11, and the cart frame is in the unfolded state.

[0115] The first shaft 16 and the limiting portion 114 are respectively located at two opposite ends of the first connecting member 112, and the first shaft 16 is close to the upper end of the first connecting member 112, and the limiting portion 114 is close to the lower end of the first connecting member 112. This arrangement makes the distance between the first shaft 16 and the limiting portion 114 relatively large, which can improve the connection strength between the front bracket 11 and the rear bracket 12 when the child stroller is in the unfolded state.

[0116] Preferably, when the baby stroller is in the unfolded state, the first shaft 16 and the limiting portion 114 are located at the upper and lower sides of the front support rod 111 respectively.

[0117] The limiting portion 114 and the first connecting member 112 are integrally formed.

[0118] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A baby stroller, characterized in that: The stroller comprises a stroller frame having an unfolded state and a folded state, the stroller frame comprising a front bracket, a rear bracket and a push rod assembly, the upper portion of the front bracket is rotatably connected to the upper portion of the rear bracket, the lower portion of the push rod assembly is slidably connected to the upper portion of the front bracket, the stroller further comprises a seat assembly arranged on the stroller frame, the seat assembly comprises a seat frame, a drawstring and a cloth cover, in the unfolded state, the drawstring is supported between the seat frame and the push rod assembly, the cloth cover is arranged between the drawstring and the seat frame, and the cloth cover and the seat frame enclose a bearing space that is open to the front; in the process of unfolding the stroller from the folded state, the push rod assembly is in the unfolded position before the rear bracket; When the push rod assembly is fully deployed, the pull rope is in a pre-tensioned state; when the rear bracket is rotated to an deployed position relative to the front bracket, the rear bracket drives the pull rope to be tensioned to a tensioned state.

2. The baby stroller according to claim 1, characterized in that: The first end of the pull rope is fixedly arranged on the seat frame, and the second end of the pull rope is arranged in cooperation with the rear bracket after passing through the upper part of the push rod assembly, so that the pull rope is moved and tensioned when the rear bracket moves toward the unfolded state.

3. The stroller according to claim 2, characterized in that: The upper part of the rear bracket is provided with a bracket winding part which can slide relative to the pull rope, and the second end of the pull rope is wound around the bracket winding part and then fixedly arranged on the seat frame; Alternatively, the second end of the pull rope is fixedly arranged on the upper part of the rear bracket.

4. The stroller according to claim 3, characterized in that: The rear bracket is rotatably matched with the front bracket around a first axis, and a portion of the rear bracket extends upward to the other side of the first axis to form an extension portion, and the bracket winding portion is arranged on the extension portion.

5. The stroller according to claim 4, characterized in that: The first end of the pull rope is fixedly arranged on the front part of the seat frame, the rear part of the seat frame is provided with a seat frame winding part that can slide relative to the pull rope, and the upper part of the push rod assembly is provided with a push rod winding part that can slide relative to the pull rope; the second end of the pull rope is successively wound around the push rod winding part, the seat frame winding part and the bracket winding part, and then fixedly arranged on the seat frame; or, the second end of the pull rope is successively wound around the push rod winding part and the seat frame winding part, and then arranged on the upper part of the rear bracket. The push rod surrounding portion is rotatably disposed on the push rod assembly, the seat frame surrounding portion is rotatably disposed on the seat frame, and the support surrounding portion is rotatably disposed on the rear support.

6. The stroller according to claim 5, characterized in that: The seat frame is movably arranged on the front support, and the seat assembly further comprises a linkage mechanism arranged between the seat frame and the rear support, the linkage mechanism is movably connected with the rear support and the seat frame respectively, and when the rear support is folded toward the front support, the rear support drives the seat frame to be folded toward the front support through the linkage mechanism; When the rear bracket rotates toward the unfolded position, the rear bracket drives the seat frame to move toward the unfolded position through the linkage mechanism; When the rear bracket rotates toward the unfolded position, the bracket winding portion and the seat frame winding portion move in directions away from each other to tighten the drawstring; The seat frame is rotatably connected to the front bracket via a second shaft, and in the unfolded state, the second shaft is arranged between the seat frame winding portion and the bracket winding portion; The linkage mechanism comprises a connecting rod, one end of which is rotationally matched with the front part of the seat frame; and the other end of the connecting rod is rotationally matched with the upper part of the rear bracket.

7. The baby stroller according to claim 5, characterized in that: The seat frame is provided with a first through hole, and the pull rope extends from a fixed point on the seat frame to the left or right toward the outer side of the seat frame, then passes through the first through hole, and then extends upward and moves around the push rod assembly; and / or, the seat frame is also provided with a second through hole, and the pull rope extends from the push rod assembly downward, passes through the second through hole, and then extends backward and moves around the rear part of the seat frame.

8. The stroller according to claim 2, characterized in that: The push rod assembly also includes a push handle located at the top, the push handle includes a cross bar and side bars respectively arranged at the two ends of the cross bar, the rear bracket is respectively arranged on the left and right sides, the pull rope is respectively arranged on the left and right sides, the first end of the pull rope on each side is fixedly arranged on the corresponding side of the seat frame, and after it is moved around the side bar on the corresponding side and the upper part of the rear bracket on the corresponding side in sequence, the second end of the pull rope is fixedly arranged on the corresponding side of the seat frame; or, the first end of the pull rope on each side is fixedly arranged on the corresponding side of the seat frame, and after it is moved around the side bar on the corresponding side, the second end of the pull rope is fixedly arranged on the upper part of the rear bracket on the corresponding side.

9. The baby stroller according to claim 1, characterized in that: The front bracket includes a front support rod and a first connecting member fixedly arranged on the upper part of the front support rod, and the rear brackets are respectively arranged on the left and right sides, and the upper part of the rear bracket on each side is rotatably connected to the corresponding side part of the first connecting member, and the lower part of the push rod assembly is rotatably or slidably connected to the upper part of the front support rod.

10. The baby stroller according to claim 9, characterized in that: The push rod assembly comprises an upper push rod and a lower push rod, the lower portion of the upper push rod is slidably connected to the upper portion of the lower push rod, the lower portion of the lower push rod is slidably connected to the upper portion of the front support rod, and the front support rod, the lower push rod and the upper push rod are all arc-shaped.

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