Folding structure of baby stroller

Abstract

The utility model belongs to the technical field of baby strollers, and particularly relates to a folding structure of a baby stroller, which comprises a foldable stroller frame, a flexible seat pocket is arranged on the stroller frame, the stroller frame comprises a first wheel carrier and a second wheel carrier, the first wheel carrier comprises two groups of first side frames and a first folding connecting rod, and the second wheel carrier comprises two groups of second side frames and a second folding connecting rod. The second wheel carrier comprises two groups of second side frames and a second folding connecting rod, and the two groups of first side frames are respectively connected with the two groups of second side frames in a foldable manner; two sets of third folding connecting rods are arranged between the first wheel carrier and the second wheel carrier, sliding seats are arranged on the second side frames in a sliding mode, universal connecting seats are arranged at the two ends of the third folding connecting rods respectively, one ends of the third folding connecting rods are movably connected with the first side frames through the universal connecting seats, and the third folding connecting rods are movably connected with the sliding seats through the universal connecting seats; the frame is provided with a limiting piece for limiting folding of the first folding connecting rod and the second folding connecting rod. The folding structure of the baby stroller is convenient to store and store.

Description

Technical Field

[0001] The utility model belongs to the technical field of baby strollers, and in particular relates to a folding structure of a baby stroller. Background Art

[0002] A baby stroller is a "means of transportation" for babies. It requires someone to help push or pull the stroller. A baby stroller is generally composed of a sunshade, a seat cushion, a sleeping basket and a haze cover.

[0003] Some baby strollers on the market are provided with hard seat cushions on their frames, but the seat cushions of such baby strollers are large and inconvenient to fold. Some baby strollers are provided with flexible seat pockets, which are unfolded through the frame. For example, a child stroller disclosed in Chinese utility model patent CN202322774118.7 is provided with a support sleeve, which can slide up and down along the hand push frame, and the front foot assembly and the rear foot assembly are both rotatably connected to the support sleeve, one end of the front foot support rod is rotatably connected to the bottom of the hand push frame, the front foot support rod is also rotatably connected to the front foot assembly, and the rear foot One end of the support rod is rotatably connected to the bottom of the hand push frame, and the other end of the rear foot support rod is rotatably connected to the rear foot assembly. When the child stroller needs to be folded to a folded state, the support sleeve can be slid upward, and the support sleeve drives the front foot assembly and the rear foot assembly to fold toward the hand push frame. In the process of folding the front foot assembly and the rear foot assembly, the front foot support rod and the front foot assembly can be driven to fold together, and the rear foot support rod and the rear foot assembly can also be driven to fold together, so that the hand push frame, the front foot assembly, the rear foot assembly, the front foot support rod and the rear foot support rod are all folded together, and the volume after folding is smaller.

[0004] The above structure drives the cloth seat to shrink and expand through the foldable frame, which can reduce the volume of the stroller after folding. However, since the left and right sides of the stroller cannot be folded toward the middle, the width of the stroller after folding is relatively large, which is inconvenient to store and accommodate. Summary of the invention

[0005] In order to overcome the defects in the prior art, the purpose of the utility model is to provide a folding structure of a baby stroller that is convenient for storage.

[0006] The purpose of the utility model is achieved in this way:

[0007] A folding structure of a baby stroller, comprising a foldable frame, the frame being provided with wheels and a flexible seat pocket, the frame comprising a first wheel frame and a second wheel frame which are foldably arranged, the first wheel frame comprising two groups of first side frames and a first folding connecting rod for connecting the two first side frames, the second wheel frame comprising two groups of second side frames and a second folding connecting rod for connecting the two second side frames, the first folding connecting rod and the second folding connecting rod are both foldable structures, and the two groups of first side frames are foldably connected to the two groups of second side frames respectively;

[0008] Two groups of third folding links are arranged between the first wheel frame and the second wheel frame, and the two groups of third folding links can be folded with each other. Sliding seats are slidably arranged on the second side frame, and universal connection seats are respectively arranged at both ends of the third folding links. One end of the third folding link is movably connected to the first side frame through the universal connection seat, and the third folding link is movably connected to the sliding seat through the universal connection seat; the second wheel frame, the first wheel frame, the third folding link and the sliding seat form a four-bar mechanism;

[0009] The frame is provided with a limit piece for limiting the folding of the first folding link and the second folding link. The movement of the limit piece is controlled so that the first folding link and the second folding link can be folded relative to each other, so that the two groups of third folding links can be folded with each other, and the two groups of first side frames and the two groups of second side frames can be brought closer to each other.

[0010] The utility model is further configured as follows: auxiliary folding links are arranged between the sliding seats, the auxiliary folding links are rotatably connected to the sliding seats respectively, and the two sets of second side frames can be brought closer to each other by controlling the auxiliary folding links and the second folding links to fold.

[0011] The utility model is further configured as follows: the first wheel frame and / or the second wheel frame is provided with a flexible pedal to control the folding of the first folding link or the second folding link, and the flexible pedal can be bent and deformed.

[0012] The utility model is further configured as follows: the flexible pedal is arranged above the first folding link and / or the second folding link, and the first folding link and / or the second folding link can support the flexible pedal.

[0013] The utility model is further configured as follows: the universal connecting seat is rotatably connected to the third folding connecting rod and the first side frame / sliding seat respectively.

[0014] The utility model is further configured as follows: a limiting protrusion is provided on the second side frame, the limiting protrusion limits the movement range of the sliding seat on the second side frame, and the sliding seat abuts against the limiting protrusion so that the third folding connecting rod is vertically arranged with the second side frame.

[0015] The utility model is further configured as follows: the vehicle frame also includes a push rod, which can slide and retract toward the first wheel frame, and the push rod includes extension rods that are respectively slidably connected to the two groups of first side frames, and a foldable fourth folding connecting rod is arranged between the extension rods; controlling the two groups of first side frames and the two groups of second side frames to move closer to each other can drive the fourth folding connecting rod to fold.

[0016] The utility model is further configured as follows: the fourth folding connecting rod includes a first rod body and a second rod body that are rotatably connected, the first rod body and the second rod body are rotatably connected to the two extension rods respectively, a sliding groove is provided on the first rod body, a positioning groove is provided on the second rod body, a limiting member is slidably arranged in the sliding groove, and a first elastic member is provided in the sliding groove, a driving member is movably arranged at the bottom of the positioning groove, the first elastic member drives one end of the limiting member to pass through the sliding groove and cooperate with the positioning groove, so that the two rod bodies are relatively fixed, and the driving member can drive the limiting member to disengage from the positioning groove.

[0017] The utility model is further configured as follows: a clamping piece and a second elastic piece are provided at the lower part of the extension rod, two groups of clamping holes adapted to the clamping piece are provided on the first side frame, the second elastic piece drives the clamping piece to cooperate with the two groups of clamping holes respectively so that the extension rod and the first side frame maintain a contracted state and an extended state, and a control component for controlling the movement of the clamping piece is also provided on the extension rod, and the control component extends to the upper part of the extension rod.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] 1. The foldable first folding link and the second folding link in the utility model enable the two groups of first side frames and the two groups of second side frames to be close to each other, thereby reducing the width of the stroller after folding. The second wheel frame, the first wheel frame, the third folding link and the sliding seat form a four-bar mechanism, which facilitates the second wheel frame and the first wheel frame to be folded close to each other, thereby reducing the length of the stroller after folding, thereby reducing the volume of the stroller after folding, and facilitating the storage of the stroller. The two groups of foldable third folding links can synchronize the front and rear folding and the left and right folding of the frames, thereby facilitating the rapid folding of the stroller. In this structure, the first folding link and the second folding link are limited by the limiter to fold, so that the stroller can be kept in the unfolded state, which is convenient for the user to use.

[0020] 2. The setting of the auxiliary folding link in the utility model is conducive to improving the structural strength of the baby stroller, and facilitates the synchronous movement of the sliding seat, and is convenient for the unfolding and folding of the baby stroller; the setting of the flexible pedal is convenient for the baby to step on, improves the comfort of the baby stroller, and the flexible pedal will not affect the folding of the baby stroller, and is convenient for the rapid unfolding and folding of the baby stroller; the first folding link and / or the second folding link that can support the flexible pedal are conducive to improving the stable support of the flexible pedal, and can avoid the flexible pedal from being damaged due to large deformation.

[0021] 3. In the utility model, the universal connecting seat rotatably connected with the third folding connecting rod and the first side frame / sliding seat respectively facilitates the flexible movement of the third folding connecting rod and the first side frame and the second side frame, and is convenient for the unfolding and folding of the baby stroller; the setting of the limiting protrusion is conducive to the stable connection between the second folding connecting rod and the second side frame when the baby stroller is unfolded, avoiding the relative movement between the sliding seat and the second side frame during the use of the baby stroller and affecting the use of the baby stroller.

[0022] 4. In the utility model, the extension rod slidably connected to the two groups of first side frames facilitates the retraction of the push rod toward the first side frame, thereby reducing the height of the baby stroller after folding, and the arrangement of the fourth folding connecting rod facilitates improving the stability of the baby stroller and preventing the extension rod from being bent and damaged by force; the limiting piece arranged on the fourth folding connecting rod facilitates the user's operation and control, thereby facilitating the user to control the folding of the baby stroller.

[0023] 5. In the utility model, the extension rod and the first side frame are relatively fixed by controlling the clamping member and the second elastic member, and the control component extending to the upper part of the extension rod facilitates the user to quickly control the movement of the clamping member, so as to facilitate the user to control the rapid extension or shortening of the first side frame and the extension rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the utility model after the flexible seat pocket is removed;

[0026] Figure 3 It is a schematic diagram of the connection structure of the first side frame, the second side frame and the third folding connecting rod in the utility model;

[0027] Figure 4 It is a schematic diagram of the structure of the utility model in a folded state;

[0028] Figure 5 It is an exploded schematic diagram of the fourth folding connecting rod in the utility model;

[0029] Figure 6 It is a structural schematic diagram of the first rod body in the utility model;

[0030] Figure 7 It is a structural schematic diagram of the second rod body in the utility model;

[0031] Figure 8 It is a schematic diagram of the connection structure between the control component and the card connector in the utility model;

[0032] Fig. 9 It is a cross-sectional view of the connection structure between the control component and the clamping member in the utility model;

[0033] Fig.10This is a schematic diagram of the connection structure between the third folding link and the auxiliary folding link in the utility model. The meanings of the numbers in the figure are: 1-first wheel frame; 11-first side frame; 12-first folding link; 13-flexible pedal; 111-storage hole; 112-clamping hole; 2-second wheel frame; 21-second side frame; 22-second folding link; 23-limiting protrusion; 3-push rod; 31-extension rod; 32-fourth folding link; 33-second elastic member; 34-clamping member; 35-control assembly; 36-transmission seat; 37-clamping block; 38-guide block; 311-handle; 321-first rod body; 322-second rod body; 323-sliding groove; 324-positioning groove; 325-through groove;

[0034] 326-limiting protrusion; 327-limiting swing groove; 351-first limiting pin; 352-third elastic member;

[0035] 353 - third mounting slot; 354 ​​- control rod; 361 - driving slot; 362 - second mounting slot;

[0036] 371-second limit pin; 372-driving rod; 381-guide groove; 4-flexible seat pocket; 5-third folding connecting rod; 51-universal connecting seat; 52-sliding seat; 6-auxiliary folding connecting rod; 61-third rod body; 7-limiting member; 71-first elastic member; 72-driving member; 73-driving hook. DETAILED DESCRIPTION

[0037] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments:

[0038] See also Figures 1 to 10 As shown, a folding structure of a baby stroller includes a foldable frame, on which wheels and a flexible seat 4 are arranged, the frame includes a first wheel frame 1 and a second wheel frame 2 that can be folded, the first wheel frame 1 includes two groups of first side frames 11 and a first folding connecting rod 12 for connecting the two first side frames 11, the second wheel frame 2 includes two groups of second side frames 21 and a second folding connecting rod 22 for connecting the two second side frames 21, the first folding connecting rod 12 and the second folding connecting rod 22 are both foldable structures, the two groups of first side frames 11 are respectively connected to the two groups of second side frames 21 is foldably connected; two groups of third folding links 5 are arranged between the first wheel frame 1 and the second wheel frame 2, and the two groups of third folding links 5 can be folded with each other. Sliding seats 52 are slidably arranged on the second side frame 21, and universal connecting seats 51 are respectively arranged at both ends of the third folding links 5. One end of the third folding link 5 is movably connected to the first side frame 11 through the universal connecting seat 51, and the third folding link 5 is movably connected to the sliding seat 52 through the universal connecting seat 51; the second wheel frame 2, the first wheel frame 1, the third folding link 5 and the sliding seat 52 form a four-bar mechanism.

[0039] The foldable first folding link 12 and the second folding link 22 in the above structure enable the two groups of first side frames 11 and the two groups of second side frames 21 to move closer to each other, thereby reducing the width of the stroller after folding. The second wheel frame 2, the first wheel frame 1, the third folding link 5 and the sliding seat 52 form a four-bar mechanism, which facilitates the second wheel frame 2 and the first wheel frame 1 to fold closer to each other, thereby reducing the length of the stroller after folding, thereby reducing the volume of the stroller after folding, and facilitating the storage of the stroller. The two groups of foldable third folding links 5 can enable the front and rear folding and the left and right folding of the frame to be carried out synchronously, thereby facilitating the rapid folding of the stroller.

[0040] The frame is provided with a limiter 7 for limiting the folding of the first folding link 12 and the second folding link 22. The movement of the limiter 7 is controlled so that the first folding link 12 and the second folding link 22 can be folded relative to each other, so that the two groups of third folding links 5 can be folded with each other, and the two groups of first side frames 11 and the two groups of second side frames 21 can be brought closer to each other. The setting of the limiter 7 can limit the folding of the first folding link 12 and the second folding link 22 so that the baby stroller can remain in the unfolded state, which is convenient for the user to use.

[0041] In the drawings of the utility model specification, the first wheel frame 1 is arranged at the front side of the baby stroller, and the second wheel frame 2 is arranged at the rear side of the baby stroller. Wheels are arranged on the first wheel frame 1 and the second wheel frame 2 respectively.

[0042] An auxiliary folding link 6 is provided between the sliding seats 52 in the utility model, and the auxiliary folding link 6 is rotatably connected to the sliding seats 52 respectively. The auxiliary folding link 6 and the second folding link 22 are controlled to fold so that the two sets of second side frames 21 can be brought closer to each other. The provision of the auxiliary folding link 6 is beneficial to improving the structural strength of the baby stroller, and facilitates the synchronous movement of the sliding seats 52, thereby facilitating the unfolding and folding of the baby stroller.

[0043] The first folding link 12, the second folding link 22 and the auxiliary folding link 6 each include at least two third rods 61 rotatably connected in sequence, and the third rods 61 located at both ends are rotatably connected to the first side frame 11 or the second side frame 21 respectively. In this embodiment, the first folding link 12, the second folding link 22 and the auxiliary folding link 6 each include two third rods 61 rotatably connected in sequence.

[0044] The third folding link 5 can be a plurality of rods connected in rotation in sequence, and one side of the rods of two third folding links 5 is hinged to form a plurality of X-shaped structures. In this embodiment, the third folding link 5 can also be an integrated rod, which is hinged in an X shape.

[0045] The universal connecting seat 51 can be a universal ball head. The universal connecting seat 51 in the utility model is rotatably connected to the third folding link 5 and the first side frame 11 / sliding seat 52 respectively. The universal connecting seat 51 rotatably connected to the third folding link 5 and the first side frame 11 / sliding seat 52 respectively facilitates the flexible movement of the third folding link 5 and the first side frame 11 and the second side frame 21, thereby facilitating the unfolding and folding of the baby stroller.

[0046] In the utility model, the first wheel frame 1 and / or the second wheel frame 2 is provided with a flexible pedal 13 to control the folding of the first folding link 12 or the second folding link 22. The flexible pedal 13 can be bent and deformed. The setting of the flexible pedal 13 is convenient for the baby to step on, thereby improving the comfort of the baby stroller. The flexible pedal 13 will not affect the folding of the baby stroller, thereby facilitating the rapid unfolding and folding of the baby stroller. The flexible pedal 13 in this embodiment can be made of rubber material, or can be made of cloth or leather.

[0047] Preferably, the flexible pedal 13 is arranged above the first folding link 12 and / or the second folding link 22, and the first folding link 12 and / or the second folding link 22 can support the flexible pedal 13. This structure in which the first folding link 12 and / or the second folding link 22 can support the flexible pedal 13 is beneficial to improving the stable support of the flexible pedal 13 and can avoid damage to the flexible pedal 13 due to large deformation.

[0048] In the present invention, a limiting protrusion 23 is provided on the second side frame 21, and the limiting protrusion 23 limits the movement range of the sliding seat 52 on the second side frame 21, and the sliding seat 52 abuts against the limiting protrusion 23 so that the third folding link 5 and the second side frame 21 are vertically arranged. The setting of the limiting protrusion 23 is conducive to the stable connection between the second folding link 22 and the second side frame 21 when the baby stroller is unfolded, thereby avoiding relative movement between the sliding seat 52 and the second side frame 21 during use of the baby stroller and affecting the use of the baby stroller.

[0049] The frame also includes a push rod 3, which can slide and retract toward the first wheel frame 1, and the push rod 3 includes extension rods 31 slidably connected to the two groups of first side frames 11 respectively, and a foldable fourth folding link 32 is arranged between the extension rods 31; controlling the two groups of first side frames 11 and the two groups of second side frames 21 to move closer to each other can drive the fourth folding link 32 to fold, and the extension rod 31 slidably connected to the two groups of first side frames 11 facilitates the retraction of the push rod 3 toward the first side frames 11, thereby facilitating the reduction of the height of the baby stroller after folding, and the arrangement of the fourth folding link 32 facilitates the improvement of the stability of the baby stroller and prevents the extension rod 31 from being bent and damaged by force.

[0050] In the present invention, the limit member 7 can be arranged on one of the first folding link 12, the second folding link 22, the fourth folding link 32 or the auxiliary folding link 6. However, since the first folding link 12, the second folding link 22 and the auxiliary folding link 6 are mostly arranged at the lower part of the baby stroller, it is preferred that the limit member 7 is arranged on the fourth folding link 32, so that the user can operate and control the limit member 7 and control the folding of the baby stroller.

[0051] The fourth folding link 32 includes a first rod body 321 and a second rod body 322 that are rotatably connected. The first rod body 321 and the second rod body 322 are rotatably connected to the two extension rods 31 respectively. A sliding groove 323 is provided on the first rod body 321, and a positioning groove 324 is provided on the second rod body 322. The limiting member 7 is slidably set in the sliding groove 323, and a first elastic member 71 is provided in the sliding groove 323. A driving member 72 is movably set at the bottom of the positioning groove 324. The first elastic member 71 drives one end of the limiting member 7 to pass through the sliding groove 323 and cooperate with the positioning groove 324, so that the two rod bodies are relatively fixed. The driving member 72 can drive the limiting member 7 to disengage from the positioning groove 324. The structure is simple and is convenient for the baby stroller to maintain the unfolded state.

[0052] In this embodiment, a through groove 325 is provided at the bottom of the positioning groove 324, and a driving hook 73 is provided on the driving member 72. The driving hook 73 passes through the through groove 325 and prevents the driving member 72 from being separated from the second rod body 322, and the driving hook 73 can abut against the limiting member 7 to separate the limiting member 7 from the positioning groove 324, and a limiting protrusion 326 and a limiting swing groove 327 are respectively provided on the first rod body 321 and the second rod body 322. When the first rod body 321 and the second rod body 322 rotate relative to each other, the limiting protrusion 326 and the limiting swing groove 327 cooperate to limit the relative rotation angle of the first rod body 321 and the second rod body 322.

[0053] Preferably, the limiting member 7 and the positioning groove 324 have two fixed positions. When the baby stroller is unfolded or folded, the limiting member 7 cooperates with the positioning groove 324 respectively, so that the baby stroller remains in the unfolded state or the folded state.

[0054] The lower part of the extension rod 31 described in the utility model is provided with a clamping piece 34 and a second elastic piece 33, and the first side frame 11 is provided with two groups of clamping holes 112 adapted to the clamping piece 34. The second elastic piece 33 drives the clamping piece 34 to cooperate with the two groups of clamping holes 112 respectively to keep the extension rod 31 and the first side frame 11 in a contracted state and an extended state, and the extension rod 31 is also provided with a control component 35 for controlling the movement of the clamping piece 34. The control component 35 extends to the upper part of the extension rod 31. The clamping piece 34 and the second elastic piece 33 control the extension rod 31 and the first side frame 11 to be relatively fixed, and the control component 35 extending to the upper part of the extension rod 31 facilitates the user to quickly control the movement of the clamping piece 34, so that the user can control the rapid extension or shortening of the first side frame 11 and the extension rod 31. The upper end of the extension rod 31 described in the utility model is provided with a handle 311, and the control component 35 extends to one side of the handle 311.

[0055] In this embodiment, a first limit pin 351 is provided on the extension rod 31, and a third mounting groove 353 is provided on the control component 35. A third elastic member 352 is provided in the third mounting groove 353. One end of the third elastic member 352 abuts against the first limit pin 351, and the other end of the third elastic member 352 abuts against the side wall of the third mounting groove 353, so that the third elastic member 352 can drive the control component 35 to reset.

[0056] A storage hole 111 is provided in the first side frame 11, the extension rod 31 is slidably set in the storage hole 111, the clamping hole 112 is set on the side wall of the storage hole 111, the clamping part 34 includes a transmission seat 36 and a clamping block 37 adapted to the clamping hole 112, a guide block 38 is provided on the extension rod 31, a guide groove 381 is provided on the guide block 38, the clamping block 37 is slidably set in the guide groove 381, the transmission seat 36 is slidably set on the extension rod 31, and an inclined driving groove 361 is provided on the transmission seat 36, and a driving rod 372 adapted to the driving groove 361 is provided on the clamping block 37, and the control component 35 drives the transmission seat 36 to slide through the control rod 354, and drives the clamping block 37 to cooperate with or disengage from the clamping hole 112 through the driving groove 361.

[0057] Preferably, a second limiting pin 371 is provided on the extension rod 31, a second mounting groove 362 is provided on the transmission seat 36, and the second elastic member 33 is provided in the second mounting groove 362. One end of the second elastic member 33 abuts against the second limiting pin 371, and the other end of the second elastic member 33 abuts against the side wall of the second mounting groove 362, so that the second elastic member 33 can drive the transmission seat 36 to reset, and control the card block 37 to cooperate with the card hole 112 through the driving groove 361.

[0058] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A folding structure of a baby stroller, comprising a foldable frame, on which wheels and a flexible seat pocket (4) are arranged, the frame comprising a first wheel frame (1) and a second wheel frame (2) which are foldably arranged, characterized in that: The first wheel frame (1) comprises two groups of first side frames (11) and a first folding connecting rod (12) for connecting the two first side frames (11); the second wheel frame (2) comprises two groups of second side frames (21) and a second folding connecting rod (22) for connecting the two second side frames (21); both the first folding connecting rod (12) and the second folding connecting rod (22) are foldable structures; the two groups of first side frames (11) are respectively foldably connected to the two groups of second side frames (21); Two groups of third folding links (5) are arranged between the first wheel frame (1) and the second wheel frame (2), and the two groups of third folding links (5) can be folded mutually; a sliding seat (52) is slidably arranged on the second side frame (21); universal connection seats (51) are respectively arranged at both ends of the third folding link (5); one end of the third folding link (5) is movably connected to the first side frame (11) through the universal connection seat (51); the third folding link (5) is movably connected to the sliding seat (52) through the universal connection seat (51); the second wheel frame (2), the first wheel frame (1), the third folding link (5) and the sliding seat (52) form a four-bar mechanism; The frame is provided with a limiter (7) for limiting the folding of the first folding link (12) and the second folding link (22). The limiter (7) is controlled to move so that the first folding link (12) and the second folding link (22) can be folded relative to each other, thereby enabling the two groups of third folding links (5) to be folded relative to each other, and enabling the two groups of first side frames (11) and the two groups of second side frames (21) to be brought closer to each other.

2. The folding structure of a baby stroller according to claim 1, characterized in that: An auxiliary folding link (6) is arranged between the sliding seats (52), and the auxiliary folding link (6) is rotatably connected to the sliding seats (52) respectively. By controlling the auxiliary folding link (6) and the second folding link (22) to fold, the two sets of second side frames (21) can be brought closer to each other.

3. The folding structure of a baby stroller according to claim 1, characterized in that: The first wheel frame (1) and / or the second wheel frame (2) is provided with a flexible pedal (13) for controlling the folding of the first folding link (12) or the second folding link (22); the flexible pedal (13) is bendable and deformable.

4. The folding structure of a baby stroller according to claim 3, characterized in that: The flexible pedal (13) is arranged above the first folding link (12) and / or the second folding link (22), and the first folding link (12) and / or the second folding link (22) can support the flexible pedal (13).

5. The folding structure of a baby stroller according to claim 1, characterized in that: The universal connection seat (51) is rotationally connected to the third folding connecting rod (5) and the first side frame (11) / sliding seat (52) respectively.

6. The folding structure of a baby stroller according to claim 1, characterized in that: A limiting protrusion (23) is provided on the second side frame (21), the limiting protrusion (23) limits the movement range of the sliding seat (52) on the second side frame (21), and the sliding seat (52) abuts against the limiting protrusion (23) so that the third folding connecting rod (5) and the second side frame (21) are arranged vertically.

7. The folding structure of a baby stroller according to claim 1, characterized in that: The frame further comprises a push rod (3) which can slide and retract toward the first wheel frame (1), and the push rod (3) comprises extension rods (31) which are respectively slidably connected to the two groups of first side frames (11), and a foldable fourth folding link (32) is arranged between the extension rods (31); the fourth folding link (32) can be driven to fold by controlling the two groups of first side frames (11) and the two groups of second side frames (21) to move closer to each other.

8. The folding structure of a baby stroller according to claim 7, characterized in that: The fourth folding connecting rod (32) comprises a first rod body (321) and a second rod body (322) which are rotatably connected. The first rod body (321) and the second rod body (322) are rotatably connected to the two extension rods (31) respectively. A sliding groove (323) is provided on the first rod body (321), and a positioning groove (324) is provided on the second rod body (322). The limiting member (7) is slidably arranged in the sliding groove (323), and a first elastic member (71) is provided in the sliding groove (323). A driving member (72) is movably arranged at the bottom of the positioning groove (324). The first elastic member (71) drives one end of the limiting member (7) to pass through the sliding groove (323) and cooperate with the positioning groove (324), so that the two rod bodies are relatively fixed. The driving member (72) can drive the limiting member (7) to disengage from the positioning groove (324).

9. The folding structure of a baby stroller according to claim 7, characterized in that: The lower part of the extension rod (31) is provided with a clamping piece (34) and a second elastic piece (33); the first side frame (11) is provided with two groups of clamping holes (112) adapted to the clamping piece (34); the second elastic piece (33) drives the clamping piece (34) to respectively cooperate with the two groups of clamping holes (112) so that the extension rod (31) and the first side frame (11) maintain a contracted state and an extended state; and the extension rod (31) is also provided with a control component (35) for controlling the movement of the clamping piece (34); the control component (35) extends to the upper part of the extension rod (31).

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