A child's pushchair

Abstract

The utility model discloses a kind of children's pushchairs, including pushchair frame and seat component, the pushchair frame includes bottom support, pushrod assembly, first support seat and second support seat, the first support seat is rotatably connected with the bottom support, and the seat component is set on the first support seat;The second support seat is rotatably connected with the bottom support, or the second support seat is rotatably connected with the first support seat, or the first support seat, the second support seat, the bottom support coaxial rotation connection, and the pushrod assembly is set on the second support seat.In the pushchair frame of this children's pushchair, first support seat and second support seat can rotate relative to bottom support, so that when children's pushchair is folded, first support seat can drive seat component to rotate and close to bottom support, second support seat can drive pushrod assembly to rotate and close to bottom support, which can make the structure compact after children's pushchair is folded, small in size, convenient to carry and store.

Description

Technical Field

[0001] This utility model relates to the field of children's products technology, specifically to a children's stroller. Background Technology

[0002] Strollers are generally used when adults take children out. A stroller typically consists of a frame and a seat assembly mounted on the frame. For ease of carrying and storage, both the frame and seat assembly are usually foldable. However, some existing strollers have a non-compact folding structure, resulting in a bulky design that is inconvenient to carry and store. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a children's stroller that is compact and small in size when folded.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A stroller includes a stroller frame and a seat assembly, the stroller frame comprising:

[0006] Base support;

[0007] push rod assembly;

[0008] A first support base is rotatably connected to the base bracket, and the seat assembly is disposed on the first support base;

[0009] The second support base is rotatably connected to the bottom bracket, or the second support base is rotatably connected to the first support base, or the first support base, the second support base, and the bottom bracket are coaxially rotatably connected, and the push rod assembly is disposed on the second support base.

[0010] In some embodiments, the second support, the first support, and the base bracket are coaxially rotatably connected around a first axis. When the stroller is in the unfolded state, the first support and the second support are far apart from each other, with the first support located in front of and above the first axis and the second support located behind and below the first axis. When the stroller is folded, the first support and the second support rotate in opposite directions to approach each other.

[0011] In some embodiments, the lower part of the first support seat is provided with a first clearance space adapted to the second support seat. When the stroller is in a folded state, the second support seat extends through the first clearance space and above the first support seat.

[0012] In some embodiments, the base support includes a front support and a rear support, the upper part of the front support is rotatably connected to the upper part of the rear support, the first support seat is rotatably connected to the upper part of the front support and / or the upper part of the rear support, and the upper part of the rear support is provided with a folding hanging part; when the stroller is in the unfolded state, the folding hanging part is covered below the seat assembly; when the stroller is folded and the first support seat is rotated to approach the front support, the folding hanging part is exposed on the upper part of the rear support.

[0013] In some embodiments, the stroller further includes a first locking mechanism disposed between the first support seat and the base bracket to lock the relative position between the first support seat and the base bracket. The seat assembly has an unfolded state and a folded state. The stroller further includes a first linkage mechanism disposed between the seat assembly and the first locking mechanism, such that when the seat assembly is folded from the unfolded state, the first locking mechanism is driven to unlock.

[0014] In some embodiments, the seating assembly includes a seat, a backrest rotatably connected to the seat, an armrest rotatably connected to the backrest, and a support rod with one end rotatably connected to the armrest and the other end rotatably connected to the seat.

[0015] The first linkage mechanism includes a first driving member, a second driving member, a traction cable, and a third driving member; the first driving member is slidably mounted on the seat and cooperates with the support rod or the backrest; the second driving member is slidably mounted on the first support seat and cooperates with the first driving member; the third driving member is slidably mounted on the first support seat and cooperates with the first locking mechanism; one end of the traction cable is connected to the second driving member, and the other end of the traction cable is connected to the third driving member.

[0016] In some embodiments, the base support includes a front support and a rear support. The upper part of the front support, the upper part of the rear support, and the first support base are coaxially rotatably connected about a first axis. At the rotatable connection between the front support, the rear support, and the first support base, along the extending direction of the first axis, the first support base is disposed between the front support and the rear support. The first locking mechanism includes a first locking member slidably disposed between the first support base and the front support, and a second locking member slidably disposed between the first support base and the rear support. When the first locking mechanism is in a locked state, the first locking member engages with both the first support base and the front support, and the second locking member engages with both the first support base and the rear support. When the first locking mechanism is in an unlocked state, the first locking member engages with one of the first support base and the front support, and disengages from the other of the first support base and the front support; the second locking member engages with one of the first support base and the rear support, and disengages from the other of the first support base and the rear support.

[0017] Both the first locking member and the second locking member are engaged with the third driving member via an inclined surface.

[0018] In some embodiments, the first drive member engages with the support rod or the backrest via an inclined surface; the second drive member engages with the first drive member via an inclined surface.

[0019] In some embodiments, the stroller further includes a second locking mechanism disposed between the second support seat and the base bracket to lock the relative position between the second support seat and the base bracket. The push rod assembly is a telescopic rod assembly that can extend and retract. The stroller further includes a second linkage mechanism disposed between the push rod assembly and the second locking mechanism, such that when the push rod assembly retracts, it drives the second locking mechanism to unlock.

[0020] In some embodiments, the push rod assembly includes a lower push rod and an upper push rod slidably disposed on the lower push rod along the length extension direction of the lower push rod;

[0021] The second locking mechanism includes a third locking member slidably disposed between the second support base and the bottom bracket. When the second locking mechanism is in the locked state, the third locking member engages with the second support base and the bottom bracket respectively. When the second locking mechanism is in the unlocked state, the third locking member engages with one of the second support base and the bottom bracket and disengages from the other of the second support base and the bottom bracket.

[0022] The second linkage mechanism includes a fourth driving member that can be slidably disposed on the second support base. The fourth driving member and the third locking member are engaged by an inclined surface. When the upper push rod slides down and approaches the lower push rod, the upper push rod can abut against the fourth driving member.

[0023] In some embodiments, the seat assembly is rotatably mounted on the first support about a second axis, and the push rod assembly is rotatably mounted on the second support about a third axis; the stroller has a forward-facing use state and a reverse-facing use state, when the stroller is in the forward-facing use state, the push rod assembly is close to the seat assembly; when the stroller is in the reverse-facing use state, the push rod assembly is away from the seat assembly, and a second clearance space for accommodating a child's feet or legs is formed between the push rod assembly and the seat assembly.

[0024] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: In the stroller frame of this utility model, both the first support seat and the second support seat can rotate relative to the base support, so that when the stroller is folded, the first support seat can drive the seat assembly to rotate and move closer to the base support, and the second support seat can drive the push rod assembly to rotate and move closer to the base support. This makes the stroller compact in structure and small in size after folding, and easy to carry and store. Attached Figure Description

[0025] Appendix Figure 1 This is a three-dimensional schematic diagram of the stroller in the unfolded state (the stroller is in the forward-facing use state);

[0026] Appendix Figure 2 This is a side view of the stroller in the unfolded state (the stroller is in the forward-facing use state);

[0027] Appendix Figure 3 This is a three-dimensional schematic diagram of the stroller in the unfolded state (the stroller is in a reverse-facing usage state);

[0028] Appendix Figure 4 This is a side view of the stroller in the unfolded state in this embodiment (the stroller is in the reverse use state);

[0029] Appendix Figure 5 This is a three-dimensional schematic diagram of the stroller in this embodiment after some of its structure has been removed.

[0030] Appendix Figure 6 For the appendix Figure 5 Side view diagram of the state;

[0031] Appendix Figure 7 This is one of the cross-sectional schematic diagrams of the stroller in this embodiment;

[0032] Appendix Figure 8 For the appendix Figure 7 Enlarged view of a portion of point A in the middle;

[0033] Appendix Figure 9 This is the second sectional view of the stroller in this embodiment;

[0034] Appendix Figure 10 This is a three-dimensional schematic diagram of the first driving component in this embodiment;

[0035] Appendix Figure 11 This is a three-dimensional schematic diagram of the second driving component in this embodiment;

[0036] Appendix Figure 12 This is a three-dimensional schematic diagram of the third driving component in this embodiment;

[0037] Appendix Figure 13 This is one of the three-dimensional schematic diagrams of the stroller during the folding process in this embodiment;

[0038] Appendix Figure 14 This is one of the side view diagrams of the stroller in the folding process of this embodiment;

[0039] Appendix Figure 15 This is the second perspective view of the stroller during the folding process in this embodiment;

[0040] Appendix Figure 16 This is the second side view of the stroller in this embodiment during the folding process;

[0041] Appendix Figure 17 This is a three-dimensional schematic diagram of the stroller in the folded state according to this embodiment;

[0042] Appendix Figure 18 This is a side view of the stroller in the folded state according to this embodiment.

[0043] The components are as follows: 11. Front support; 12. Rear support; 121. Folding hanging part; 13. First support seat; 131. First clearance space; 14. Second support seat; 15. Push rod assembly; 151. Lower push rod; 152. Upper push rod; 153. Connecting seat; 21. First axis line; 22. Second axis line; 23. Third axis line; 31. Seat; 32. Backrest; 33. Armrest; 34. Support rod; 41. First locking member; 42. Second locking member; 51. First driving member; 511. First inclined surface; 512. Second inclined surface; 52. Second driving member; 521. Third inclined surface; 53. Third driving member; 531. Fourth inclined surface; 532. Fifth inclined surface; 6. Third locking member; 61. Seventh inclined surface; 7. Fourth driving member; 71. Sixth inclined surface; 81. Front wheel assembly; 82. Rear wheel assembly. Detailed Implementation

[0044] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0045] In the following description, the directions "front," "back," "left," "right," "up," and "down" all refer to... Figure 2 In the figure, the left direction is "front", the right direction is "back", the top direction is "up", and the bottom direction is "down". The directions perpendicular to the paper are "left" and "right". The above definitions of directions are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0046] like Figures 1 to 7 , Figure 9 , Figures 13-18 As shown, the stroller of this utility model has an unfolded state and a folded state. The stroller includes a stroller frame, a seat assembly disposed on the stroller frame, and a wheel assembly disposed at the bottom of the stroller frame.

[0047] The trolley frame includes a base bracket, a first support seat 13, a second support seat 14, and a push rod assembly 15. The first support seat 13 is rotatably connected to the base bracket. The second support seat 14 is rotatably connected to the base bracket, or the second support seat 14 is rotatably connected to the first support seat 13, or the second support seat 14, the first support seat 13, and the base bracket are coaxially rotatably connected about a first axis 21. The seat assembly is disposed on the first support seat 13, and the push rod assembly 15 is disposed on the second support seat 14.

[0048] In this embodiment, the base support includes a front support 11 and a rear support 12, and the wheel assembly includes a front wheel assembly 81 and a rear wheel assembly 82. The front wheel assembly 81 is disposed at the bottom of the front support 11, and the rear wheel assembly 82 is disposed at the bottom of the rear support 12.

[0049] Preferably, the upper part of the front support 11, the upper part of the rear support 12, the first support base 13, and the second support base 14 are coaxially rotatably connected around the first axis 21. This simplifies the structure of the stroller and facilitates its manufacturing. In this embodiment, at the rotatable connection of the front support 11, rear support 12, first support base 13, and second support base 14, along the extending direction of the first axis 21, the second support base 14, rear support 12, first support base 13, and front support 11 are arranged sequentially from the inside to the outside.

[0050] When the stroller is in the unfolded state, the first support seat 13 and the second support seat 14 are far apart, with the first support seat 13 located in front of and above the first axis 21, and the second support seat 14 located behind and below the first axis 21. When the stroller is folded, the first support seat 13 and the second support seat 14 rotate in opposite directions around the first axis 21 and move closer together. When the first support seat 13 rotates, it causes the seat assembly to rotate and move closer to the base bracket, and when the second support seat 14 rotates, it causes the push rod assembly 15 to rotate and move closer to the base bracket.

[0051] The lower part of the first support seat 13 is provided with a first clearance space 131, which is adapted to the second support seat 14. During the folding process of the stroller, when the first support seat 13 and the second support seat 14 rotate relative to each other and move closer together, the second support seat 14 can rotate into the first clearance space 131 and extend through the first clearance space 131 to the top of the first support seat 13. This allows the stroller frame to be more tightly packed together after folding, resulting in a more compact structure and smaller size after folding.

[0052] The upper part of the rear support 12 is provided with a folding hanging part 121, which is used to lift the stroller when it is folded, so as to facilitate the folding operation of the stroller.

[0053] In this embodiment, the push rod assembly 15 is a telescopic rod assembly that can extend and retract. Specifically, the push rod assembly 15 includes a lower push rod 151 and an upper push rod 152. The lower push rod 151 is disposed on the second support base 14, and the upper push rod 152 is slidably disposed on the lower push rod 151 along the length extension direction of the lower push rod 151.

[0054] The seat assembly has an unfolded state and a folded state. The seat assembly includes a seat 31, a backrest 32, armrests 33, and a support rod 34. The lower part of the backrest 32 is rotatably connected to the rear part of the seat 31, the rear part of the armrest 33 is rotatably connected to the backrest 32, one end of the support rod 34 is rotatably connected to the armrest 33, and the other end of the support rod 34 is rotatably connected to the seat 31. Thus, a four-bar linkage is formed between the seat 31, backrest 32, armrests 33, and support rod 34. When the backrest 32 rotates relative to the seat 31, the four-bar linkage drives the armrests 33 and support rod 34 to rotate synchronously.

[0055] The stroller also includes a first locking mechanism, which is located between the first support seat 13 and the base bracket. When the stroller is in the unfolded state, the first locking mechanism locks the relative position between the first support seat 13 and the base bracket.

[0056] Specifically, such as Figure 7 and Figure 8As shown, the first locking mechanism includes a first locking member 41 and a second locking member 42. The first locking member 41 is sleeved on the first axis 21 and is slidably disposed between the first support base 13 and the front bracket 11 along the extension direction of the first axis 21. The second locking member 42 is sleeved on the first axis 21 and is slidably disposed between the first support base 13 and the rear bracket 12 along the extension direction of the first axis 21. When the first locking mechanism is in the locked state, the first locking member 41 engages with both the first support base 13 and the front bracket 11, and the second locking member 42 engages with both the first support base 13 and the rear bracket 12. When the first locking mechanism is in the unlocked state, the first locking member 41 engages with one of the first support base 13 and the front bracket 11 and disengages from the other of the two, and the second locking member 42 engages with one of the first support base 13 and the rear bracket 12 and disengages from the other of the two.

[0057] In this embodiment, a first locking tooth is provided on the outer peripheral surface of the first locking member 41, and a first tooth groove that mates with the first locking tooth is provided on the first support base 13 and the front bracket 11, respectively. A second locking tooth is provided on the outer peripheral surface of the second locking member 42, and a second tooth groove that mates with the second locking tooth is provided on the first support base 13 and the rear bracket 12, respectively. When the first locking mechanism is in the locked state, the first locking tooth engages with the first tooth grooves on both sides, and the second locking tooth engages with the second tooth grooves on both sides. When the first locking mechanism is in the unlocked state, the first locking tooth engages with the first tooth groove on one of the first support base 13 and the front bracket 11, and disengages from the first tooth groove on the other; the second locking tooth engages with the second tooth groove on one of the first support base 13 and the rear bracket 12, and disengages from the second tooth groove on the other.

[0058] The stroller also includes a first linkage mechanism, which is located between the seat assembly and the first locking mechanism. When the seat assembly is folded, the first linkage mechanism can drive the first locking mechanism to unlock, so that the first locking mechanism can be unlocked without separate operation, making the folding operation of the stroller convenient.

[0059] Specifically, such as Figure 5 , Figure 6 , Figures 10-12As shown, the first linkage mechanism includes a first driving member 51, a second driving member 52, a traction cable, and a third driving member 53. The first driving member 51 is slidably mounted on the seat 31 in the left-right direction and cooperates with the support rod 34 or the backrest 32. The second driving member 52 is slidably mounted on the first support base 13 in the up-down direction and cooperates with the first driving member 51. The third driving member 53 is slidably mounted on the first support base 13 and cooperates with both the first locking member 41 and the second locking member 42. One end of the traction cable is connected to the second driving member 52, and the other end is connected to the third driving member 53.

[0060] When the seat assembly is folded and the backrest 32 rotates to come closer to the seat 31, the support rod 34 rotates relative to the seat 31, causing the first drive member 51 to slide to the left or right relative to the seat 31 towards the inside of the stroller. Through the cooperation between the first drive member 51 and the second drive member 52, the second drive member 51 is driven to slide downward relative to the first support seat 13. The traction cable pulls the third drive member 53, causing it to slide relative to the first support seat 13. When the third drive member 53 slides, it acts on the first locking member 41 and the second locking member 42 respectively, causing the first locking member 41 and the second locking member 42 to slide, thereby unlocking the first locking mechanism.

[0061] In this embodiment, a first inclined surface 511 is provided at one end of the first driving member 51. The first inclined surface 511 abuts against the support rod 34. When the seat assembly is folded and the support rod 34 is rotated, the first driving member 51 slides to the left or right relative to the seat 31 towards the inside of the stroller.

[0062] The other end of the first driving member 51 is provided with a second inclined surface 512, and the second driving member 52 is provided with a third inclined surface 521. The second inclined surface 512 and the third inclined surface 521 are abutted and cooperate with each other.

[0063] The third driving member 53 is provided with a fourth inclined surface 531 and a fifth inclined surface 532 respectively. The fourth inclined surface 531 abuts against the first locking member 41, and the fifth inclined surface 532 abuts against the second locking member 42.

[0064] The stroller also includes a second locking mechanism, which is located between the second support seat 14 and the base bracket. When the stroller is in the unfolded state, the relative position between the second support seat 14 and the base bracket is locked by the second locking mechanism.

[0065] Specifically, such as Figure 7 and Figure 8As shown, the second locking mechanism includes a third locking member 6 disposed between the second support base 14 and the rear bracket 12. The third locking member 6 is sleeved on the first axis 21 and is slidably disposed along the extending direction of the first axis 21. When the second locking mechanism is in the locked state, the third locking member 6 engages with both the second support base 14 and the rear bracket 12. When the second locking mechanism is in the unlocked state, the third locking member 6 engages with one of the second support base 14 and the rear bracket 12, and disengages from the other of the two supports 14 and the rear bracket 12.

[0066] In this embodiment, a third locking tooth is provided on the outer peripheral surface of the third locking member 6, and a third tooth groove that cooperates with the third locking tooth is provided on the second support base 14 and the rear bracket 12 respectively. When the second locking mechanism is in the locked state, the third locking tooth engages with the third tooth grooves on both sides respectively. When the second locking mechanism is in the unlocked state, the third locking tooth engages with the third tooth groove on one of the second support base 14 and the rear bracket 12, and disengages from the third tooth groove on the other.

[0067] The stroller also includes a second linkage mechanism, which is located between the push rod assembly and the second locking mechanism. When the stroller is folded and the push rod assembly 15 is retracted, the second linkage mechanism can drive the second locking mechanism to unlock. In this way, when the stroller is folded, there is no need to operate the second locking mechanism separately to unlock it, making the folding operation of the stroller convenient.

[0068] like Figures 7-9 As shown, the second linkage mechanism includes a fourth driving member 7, which is slidably mounted on the second support base 14, and the fourth driving member 7 cooperates with the third locking member 6.

[0069] In this embodiment, the fourth driving member 7 is provided with a sixth inclined surface 71, and the third locking member 6 is provided with a seventh inclined surface 61. The sixth inclined surface 71 and the seventh inclined surface 61 are abutted and cooperate with each other.

[0070] When the push rod assembly 15 is folded, the upper push rod 152 slides downward and approaches the lower push rod 151. After the upper push rod 152 slides downward a certain distance, it abuts against the fourth drive member 7. As the upper push rod 152 continues to slide downward, it drives the fourth drive member 7 to slide synchronously. The fourth drive member 7 acts on the third locking member 6, thereby causing the third locking member 6 to slide and unlocking the second locking mechanism.

[0071] In this stroller, a seat assembly is rotatably mounted on a first support 13 about a second axis 22. The seat assembly is rotatable relative to the first support 13 to have a forward-facing position with the child's face facing forward and a reverse-facing position with the child's face facing backward. A push rod assembly 15 is rotatably mounted on a second support 14 about a third axis 23. The push rod assembly 15 is rotatable relative to the second support 14 to have a first position and a second position.

[0072] The stroller has a forward-facing and a rear-facing configuration. When the stroller is in the forward-facing configuration, the seat assembly is in the forward position, with the backrest 32 located behind the seat 31. When the child is seated, the child's face is forward. The push rod assembly 15 is in the first position, close to the seat assembly. Figure 1 and Figure 2 As shown. When the stroller is in the rear-facing position, the seat assembly is in the rear-facing position, with the backrest 32 located at the front of the seat 31. When the child is seated in the seat assembly, the child's face is facing backward. The push rod assembly 15 is in the second position, at which point the push rod assembly 15 is away from the seat assembly, as shown. Figure 3 and Figure 4 As shown.

[0073] The push rod assembly 15 also includes a connecting seat 153. A lower push rod 151 is fixedly disposed at one end of the connecting seat 153, and the other end of the connecting seat 153 is rotatably connected to a second support seat 14 about a third axis 23. When the push rod assembly 15 is in the first position, both the lower push rod 151 and the upper push rod 152 are located above the third axis 23. When the push rod assembly 15 is in the second position, both the lower push rod 151 and the upper push rod 152 are located below the third axis 23, thereby creating a second clearance space between the seat assembly and the push rod assembly 15 to accommodate a child's feet or legs. This does not affect the comfort of the stroller in the reverse-facing position and eliminates the need to remove the child from the seat assembly during stroller reversal.

[0074] The stroller also includes a third linkage mechanism, which is located between the push rod assembly 15 and the seat assembly. When the push rod assembly 15 rotates relative to the second support seat 14 to switch between a first position and a second position, the third linkage mechanism can drive the seat assembly to rotate relative to the first support seat 13 to switch between a forward position and a reverse position, making the stroller's reversing operation convenient. The third linkage mechanism can adopt a structure from the prior art.

[0075] When the stroller is in the unfolded state, the first support seat 13 and the second support seat 14 are separated from each other, allowing the stroller to be used in either a forward-facing or reverse-facing position. The folding hook 121 is concealed beneath the seat assembly. Figures 1-4 As shown.

[0076] When the stroller is folded from its unfolded state, it is placed in a forward-facing position. The backrest 32 rotates forward to fold the seat assembly. During this process, the first linkage mechanism acts on the first locking member 41 and the second locking member 42, causing them to slide in the direction that unlocks the first locking mechanism. When the seat assembly is folded, the first locking mechanism is unlocked. Figure 13 and Figure 14 As shown. The first support base 13 rotates downwards around the first axis 21 to approach the front bracket 11, causing the seat assembly to rotate downwards synchronously to approach the front bracket 11, exposing the folding hanging part 121 on the rear bracket 12 at its upper part. The upper push rod 152 slides downwards to approach the lower push rod 151. During this process, the second linkage mechanism acts on the second locking member 6, causing the second locking member 6 to slide in the direction that unlocks the second locking mechanism. When the upper push rod 152 slides downwards to its final position, the second locking mechanism is in the unlocked state, as shown. Figure 15 and Figure 16 As shown. Lifting the folding hanging part 121 upwards causes the front bracket 11, the first support seat 13, and the seat assembly to rotate backwards and move closer to the rear bracket 12. This causes the second support seat 14 to drive the push rod assembly 15 to rotate forward and move closer to the rear bracket 12. During this process, the first support seat 13 and the second support seat 14 gradually approach each other. When the stroller is in the folded state, the second support seat 14 extends through the first clearance space 131 and above the first support seat 13. The seat assembly, the front bracket 11, the rear bracket 12, and the push rod assembly 15 are tightly brought together, ultimately folding as shown. Figure 17 and Figure 18 As shown. The folded stroller has a compact structure, small size, and is easy to carry and store.

[0077] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A children's stroller, characterized in that: Includes a stroller frame and a seat assembly, the stroller frame comprising: Base support; pushrod assembly; A first support base is rotatably connected to the base bracket, and the seat assembly is disposed on the first support base; The second support base is rotatably connected to the bottom bracket, or the second support base is rotatably connected to the first support base, or the first support base, the second support base, and the bottom bracket are coaxially rotatably connected, and the push rod assembly is disposed on the second support base.

2. The stroller according to claim 1, characterized in that: The second support, the first support, and the bottom bracket are coaxially rotatably connected around the first axis. When the stroller is in the unfolded state, the first support and the second support are far apart from each other, with the first support located in front of and above the first axis and the second support located behind and below the first axis. When the stroller is folded, the first support seat and the second support seat rotate and move closer together in opposite directions.

3. The stroller according to claim 1, characterized in that: The lower part of the first support seat is provided with a first clearance space that is adapted to the second support seat. When the stroller is in a folded state, the second support seat extends through the first clearance space and above the first support seat.

4. The stroller according to claim 1, characterized in that: The base support includes a front support and a rear support. The upper part of the front support is rotatably connected to the upper part of the rear support. The first support base is rotatably connected to the upper part of the front support and / or the upper part of the rear support. The upper part of the rear support is provided with a folding hanging part. When the stroller is in the unfolded state, the folding hanging part is covered below the seat assembly; when the stroller is folded and the first support seat is rotated to approach the front bracket, the folding hanging part is exposed on the upper part of the rear bracket.

5. The stroller according to claim 1, characterized in that: The stroller also includes a first locking mechanism disposed between the first support seat and the base bracket to lock the relative position between the first support seat and the base bracket. The seat assembly has an unfolded state and a folded state. The stroller also includes a first linkage mechanism disposed between the seat assembly and the first locking mechanism, such that when the seat assembly is folded from the unfolded state, the first locking mechanism is driven to unlock.

6. The stroller according to claim 5, characterized in that: The seating assembly includes a seat, a backrest rotatably connected to the seat, an armrest rotatably connected to the backrest, and a support rod with one end rotatably connected to the armrest, the other end of the support rod being rotatably connected to the seat; The first linkage mechanism includes a first driving member, a second driving member, a traction cable, and a third driving member; the first driving member is slidably mounted on the seat and cooperates with the support rod or the backrest; the second driving member is slidably mounted on the first support seat and cooperates with the first driving member; the third driving member is slidably mounted on the first support seat and cooperates with the first locking mechanism; one end of the traction cable is connected to the second driving member, and the other end of the traction cable is connected to the third driving member.

7. The stroller according to claim 6, characterized in that: The base support includes a front support and a rear support. The upper part of the front support, the upper part of the rear support, and the first support base are coaxially rotatably connected around a first axis. At the rotatable connection of the front support, the rear support, and the first support base, along the extension direction of the first axis, the first support base is disposed between the front support and the rear support. The first locking mechanism includes a first locking member slidably disposed between the first support base and the front support and a second locking member slidably disposed between the first support base and the rear support. When the first locking mechanism is in the locked state, the first locking member cooperates with the first support base and the front bracket respectively, and the second locking member cooperates with the first support base and the rear bracket respectively; When the first locking mechanism is in the unlocked state, the first locking member engages with one of the first support base and the front bracket, and disengages from the other of the first support base and the front bracket; the second locking member engages with one of the first support base and the rear bracket, and disengages from the other of the first support base and the rear bracket. Both the first locking member and the second locking member are engaged with the third driving member via an inclined surface.

8. The stroller according to claim 6, characterized in that: The first driving member engages with the support rod or the backrest via an inclined surface; the second driving member engages with the first driving member via an inclined surface.

9. The stroller according to claim 1, characterized in that: The stroller also includes a second locking mechanism, which is disposed between the second support seat and the base bracket to lock the relative position between the second support seat and the base bracket. The push rod assembly is a telescopic rod assembly that can extend and retract. The stroller also includes a second linkage mechanism disposed between the push rod assembly and the second locking mechanism, such that when the push rod assembly retracts, it drives the second locking mechanism to unlock.

10. The stroller according to claim 9, characterized in that: The push rod assembly includes a lower push rod and an upper push rod that can be slidably disposed on the lower push rod along the length extension direction of the lower push rod; The second locking mechanism includes a third locking member that is slidably disposed between the second support base and the bottom bracket. When the second locking mechanism is in the locked state, the third locking member cooperates with the second support base and the bottom bracket respectively. When the second locking mechanism is in the unlocked state, the third locking member engages with one of the second support base and the bottom bracket, and disengages from the other of the second support base and the bottom bracket. The second linkage mechanism includes a fourth driving member that can be slidably disposed on the second support base. The fourth driving member and the third locking member are engaged by an inclined surface. When the upper push rod slides down and approaches the lower push rod, the upper push rod can abut against the fourth driving member.

11. The stroller according to any one of claims 1 to 10, characterized in that: The seat assembly is rotatably mounted on the first support about a second axis, and the push rod assembly is rotatably mounted on the second support about a third axis. The stroller has a forward-facing use state and a reverse-facing use state. When the stroller is in the forward-facing use state, the push rod assembly is close to the seat assembly. When the stroller is in the reverse-facing use state, the push rod assembly is away from the seat assembly, and a second clearance space is formed between the push rod assembly and the seat assembly to accommodate the child's feet or legs.

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