Baby stroller

Abstract

A fixing seat is arranged at the upper end of a front supporting rod, two rear supporting rods are rotatably connected to the lower portion of the fixing seat, a seat supporting piece is rotatably connected to the upper portion of the fixing seat, and a transmission mechanism is arranged among the seat supporting piece, the front supporting rod and the rear supporting rods and comprises a sliding piece arranged on the front supporting rod. A front connecting rod hinged to the sliding piece and the seat supporting piece is arranged between the sliding piece and the seat supporting piece, a rear connecting rod hinged to the sliding piece and the rear supporting rod is arranged between the sliding piece and the rear supporting rod, a supporting rod is arranged in the front supporting rod, a hand push rod is arranged in the supporting rod, and a first locking mechanism is arranged between the hand push rod and the supporting rod. A second locking mechanism which locks the supporting rod and the front supporting rod and can be triggered by the hand push rod to be unlocked when the hand push rod slides downwards is arranged between the supporting rod and the front supporting rod, and a third locking mechanism which locks the sliding piece and the front supporting rod and can be triggered by the supporting rod to be unlocked when the supporting rod slides downwards is arranged between the sliding piece and the front supporting rod. The folding device is simple in structure, convenient to fold, stable and reliable.

Description

[Technical field]

[0001] The utility model relates to a baby stroller. [Background technology]

[0002] At present, baby strollers have become an indispensable item for children in their growth process. Baby strollers on the market can generally be folded or unfolded, and can be used for children to sit in the unfolded state, while being easy to be stored or stored in the folded state.

[0003] China Utility Model Patent Publication No. (CN220884521U) discloses a child stroller, the frame of which includes a support sleeve, a hand push frame, a front foot assembly, a rear foot assembly, a front foot support rod and a rear foot support rod; in an unfolded state, the support sleeve is slidably mounted on the hand push frame, and the support sleeve can be selectively fixed or detached from the hand push frame; one end of the front foot assembly is rotatably connected to the support sleeve; the rear foot assembly and the front foot assembly are respectively located on opposite sides of the hand push frame, and one end of the rear foot assembly is rotatably connected to the support sleeve; the front foot support rod One end of the support sleeve is rotatably connected to the bottom of the push frame, the other end of the front foot support rod extends obliquely upward, and the front foot support rod is also rotatably connected to the front foot assembly; one end of the rear foot support rod is rotatably connected to the bottom of the push frame, and the other end of the rear foot support rod extends obliquely downward and is rotatably connected to the rear foot assembly; when the frame is in a folded state, the support sleeve slides upward along the push frame, driving the front foot assembly and the rear foot assembly to fold in the direction close to the push frame, and driving the front foot support rod and the front foot assembly to fold together, and driving the rear foot support rod and the rear foot assembly to fold together. Although the child stroller can be folded, when the support sleeve drives the front foot assembly and the rear foot assembly to fold, the support sleeve needs to slide upward along the push frame, which is laborious and requires two hands to operate, one hand holding the push frame and the other hand holding the support sleeve to slide upward, which is inconvenient to operate. In addition, the structure of the child stroller is also relatively complicated.

[0004] Therefore, the present invention is just produced based on the above shortcomings. [Contents of the utility model]

[0005] The utility model aims to overcome the deficiencies of the prior art and provide a child stroller which has a simple structure, is easy to fold and operate, and is stable and reliable.

[0006] The utility model is realized by the following technical solutions:

[0007] A stroller for children, comprising a front support rod 1, wherein the lower end of the front support rod 1 is connected to a front wheel assembly 2, the upper end of the front support rod 1 is provided with a fixed seat 11, the lower part of the fixed seat 11 is rotatably connected to two rear support rods 3, the lower end of the rear support rod 3 is connected to a rear wheel assembly 4, the upper part of the fixed seat 11 is rotatably connected to a seat support member 5, and a transmission mechanism is provided between the seat support member 5, the front support rod 1 and the rear support rod 3 to enable the seat support member 5 and the rear support rod 3 to rotate relative to the fixed seat 11 and move closer to the front support rod 1, the transmission mechanism includes a sliding member 61 provided on the front support rod 1 and capable of sliding along the front support rod 1, the sliding member 61 and the seat support member 5 are connected to each other. 5 is provided with a front connecting rod 62 hinged to the two, a rear connecting rod 63 hinged to the two is provided between the sliding member 61 and the rear support rod 3, a support rod 7 that can slide relative to it is provided in the front support rod 1, a hand push rod 8 that can slide relative to it is provided in the support rod 7, a first locking mechanism 91 is provided between the hand push rod 8 and the support rod 7, a second locking mechanism 92 is provided between the support rod 7 and the front support rod 1, which locks the two and can be triggered and unlocked by the hand push rod 8 when the hand push rod 8 slides downward, and a third locking mechanism 93 is provided between the sliding member 61 and the front support rod 1, which locks the two and can be triggered and unlocked by the support rod 7 when the support rod 7 slides downward.

[0008] A fourth locking mechanism 94 is provided between the seat support 5 and the fixing seat 11 to lock the two and can be triggered to be unlocked by the support rod 7 when the support rod 7 slides downward.

[0009] The fourth locking mechanism 94 includes a first connecting shell 941 provided on the fixed seat 11 and a second connecting shell 942 provided on the seat support 5. The first connecting shell 941 and the second connecting shell 942 are provided with a plurality of tooth grooves 943 along the circumferential direction. A spline 944 capable of sliding therein and simultaneously engaging with the tooth grooves 943 on the first connecting shell 941 and the second connecting shell 942 is provided in the space surrounded by the first connecting shell 941 and the second connecting shell 942. A pushing block 945 capable of pushing the spline 944 to disengage from the tooth grooves 943 on the first connecting shell 941 is provided between the first connecting shell 941 and the spline 944. The pushing block 945 is provided with a driving block 946 which can slide relative to it and push the pushing block 945 to move horizontally when sliding. The support rod 7 is provided with a socket 947. The lower end of the driving block 946 is provided with a matching portion 948 which is inserted into the socket 947. The matching portion 948 is provided with a fourth inclined surface 949 which can be pushed by the edge of the socket 947 when the support rod 7 slides downward. A fourth reset spring 940 is provided between the driving block 946 and the pushing block 945, which can push the driving block 946 to reset. A fifth reset spring 94a is also provided between the second connecting shell 942 and the spline 944, which can push the spline 944 to reset.

[0010] The pushing block 945 is provided with a sixth inclined surface 94 b , and the driving block 946 is provided with a seventh inclined surface 94 c abutting against the sixth inclined surface 94 b .

[0011] The sliding member 61 is a sliding sleeve mounted on the front support rod 1, and the third locking mechanism 93 includes a third locking seat 931 arranged on the sliding sleeve, and the third locking seat 931 is provided with a third locking pin 932 that can slide therein, and the front support rod 1 is provided with a third locking hole 933 that can engage with or disengage from the third locking pin 932, and the third locking pin 932 is provided with a third inclined surface 934 that can touch the lower end of the support rod 7 when the support rod 7 slides downward, so that the third locking pin 932 is disengaged from the third locking hole 933, and a third reset spring 935 that can push the third locking pin 932 to reset is also provided between the third locking seat 931 and the third locking pin 932.

[0012] The first locking mechanism 91 includes a first locking seat 911 arranged at the lower end of the hand push rod 8, the first locking seat 911 is provided with a first locking pin 912 which can move laterally therein, the support rod 7 is provided with a first locking hole 913 which can engage with or disengage from the first locking pin 912, a movable part 914 is provided on the upper part of the hand push rod 8, a first pull rope 915 which can pull the first locking pin 912 to disengage from the first locking hole 913 is provided between the movable part 914 and the first locking pin 912, and a first reset spring 916 which can push the first locking pin 912 to reset is also provided between the first locking seat 911 and the first locking pin 912.

[0013] The movable part 914 includes a first sliding block 9141 that can slide relative to the hand push rod 8, the first pull rope 915 is arranged between the first sliding block 9141 and the first locking pin 912, the hand push rod 8 is provided with an exposed operating button 9142 that can push the first sliding block 9141 to slide, and the operating button 9142 is provided with a second lock slider 9143 that can slide relative to it, the position where the second lock slider 9143 stays includes a locking position and an unlocking position, and when the second lock slider 9143 stays in the locking position, it is fixed on the second lock slider The blocking rod 9144 on the block 9143 abuts against the blocking portion 9145 on the first sliding block 9141 to prevent the operating button 9142 from being pressed. When the second lock slider 9143 slides to the unlocking position relative to the operating button 9142, the blocking rod 9144 disengages from the blocking portion 9145 so that the operating button 9142 can be pressed to drive the first sliding block 9141 to slide, and an elastic element 9146 is provided between the second lock slider 9143 and the operating button 9142, which can push the second lock slider 9143 to reset from the unlocking position to the locking position.

[0014] The second locking mechanism 92 includes a second locking hole 921 provided on the front support rod 1, a second locking seat 922 is provided at the lower end of the support rod 7, a second locking pin 923 is provided in the second locking seat 922, which can slide therein and engage or disengage with the second locking hole 921, and a second sliding block 924 is also provided in the second locking seat 922, which can be pushed by the lower end of the hand push rod 8 to slide relative to the second locking seat 922 and push the second locking pin 923 to disengage from the second locking hole 921 during the sliding process, and a second reset spring 925 is also provided between the second locking pin 923 and the second locking seat 922, which can push the second locking pin 923 to reset.

[0015] The front end of the seat support 5 is rotatably connected to a front armrest 100 , and a foldable and flexible seat cover 200 is provided between the push rod 8 and the seat support 5 .

[0016] The front wheel assembly 2 comprises a transverse support 21 arranged at the lower end of the front support rod 1 , and front wheels 22 are arranged on both sides of the transverse support 21 .

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] 1. When folding the child stroller of the utility model, the first locking mechanism is unlocked first, and then the push rod is slid downward. The push rod unlocks the second locking mechanism during the sliding process, and the support rod can slide relative to the front support rod. When the support rod and the push rod continue to slide downward together, the support rod drives the third locking mechanism to unlock. At this time, it is only necessary to lift the fixed seat upward. Under the gravity of the seat support and the rear support rod, the sliding member slides downward along the front support rod, the front connecting rod pulls the seat support to move closer to the front support rod, and the rear connecting rod pulls the rear support rod to move closer to the front support rod, thereby realizing the folding of the child stroller. The entire child stroller has few rods and a relatively simple structure. It only needs to slide the push rod and the support rod downward and lift them upward to realize folding. The folding operation is very convenient and quick, and can be operated with one hand, which is suitable for promotion and application.

[0019] 2. The utility model provides a first locking mechanism between the push rod and the support rod, a second locking mechanism between the support rod and the front support rod, a third locking mechanism between the sliding member and the front support rod, and a fourth locking mechanism between the seat support member and the fixed seat. Therefore, the child stroller is firmly locked in the unfolded state without the components shaking, thereby ensuring safety and reliability. Moreover, the unlocking of the second locking mechanism, the third locking mechanism and the fourth locking mechanism is linked, and no separate operation is required, so that the child stroller is very convenient and quick to fold, and can be folded with one hand.

Brief Description of the Drawings

[0020] Figure 1 It is a three-dimensional diagram of the utility model;

[0021] Figure 2 It is a side view of the utility model in the unfolded state;

[0022] Figure 3 It is a side view of the utility model during the folding process;

[0023] Figure 4 It is a side view of the utility model in a folded state;

[0024] Figure 5 It is one of the cross-sectional views of the utility model;

[0025] Figure 6 yes Figure 5 Magnified view at A in the middle;

[0026] Figure 7 This is the second cross-sectional view of the utility model;

[0027] Figure 8 yes Figure 7 Magnified view at B in the middle;

[0028] Fig. 9 yes Figure 7 Enlarged view at center C;

[0029] Fig.10 yes Figure 7 Magnified view at D in the middle;

[0030] Fig.11 It is an exploded view of the components of the utility model. [Specific implementation method]

[0031] The utility model is further described below in conjunction with the accompanying drawings:

[0032] like Figures 1 to 7As shown, a stroller for children comprises a front support rod 1, a front wheel assembly 2 is connected to the lower end of the front support rod 1, the front wheel assembly 2 comprises a cross bracket 21 arranged at the lower end of the front support rod 1, front wheels 22 are arranged on both sides of the cross bracket 21, a fixed seat 11 is arranged at the upper end of the front support rod 1, two rear support rods 3 are rotatably connected to the lower part of the fixed seat 11, a rear wheel assembly 4 is connected to the lower end of the rear support rod 3, a seat support 5 is rotatably connected to the upper part of the fixed seat 11, a transmission mechanism is arranged between the seat support 5, the front support rod 1 and the rear support rod 3 to enable the seat support 5 and the rear support rod 3 to rotate relative to the fixed seat 11 and move closer to the front support rod 1, the transmission mechanism comprises a transmission mechanism arranged on the front support rod 1 and capable of rotating along the fixed seat 11. A sliding sliding member 61, a front connecting rod 62 hinged to the sliding member 61 and the seat support member 5 is provided between the sliding member 61 and the seat support member 5, a rear connecting rod 63 hinged to the sliding member 61 and the rear support rod 3 is provided between the sliding member 61 and the rear support rod 3, a support rod 7 that can slide relative to the front support rod 1 is provided inside the front support rod 1, a hand push rod 8 that can slide relative to the support rod 7 is provided inside the support rod 7, a first locking mechanism 91 is provided between the hand push rod 8 and the support rod 7, a second locking mechanism 92 is provided between the support rod 7 and the front support rod 1, which locks the two and can be triggered and unlocked by the hand push rod 8 when the hand push rod 8 slides downward, and a third locking mechanism 93 is provided between the sliding member 61 and the front support rod 1, which locks the two and can be triggered and unlocked by the support rod 7 when the support rod 7 slides downward. When the child stroller is folded, the first locking mechanism 91 is first unlocked, and then the push rod 8 is slid downward to retract into the support rod 7. The push rod 8 unlocks the second locking mechanism 92 during the sliding process. At this time, the support rod 7 and the push rod 8 can slide together relative to the front support rod 1. When the support rod 7 and the push rod 8 continue to slide downward together, the support rod 7 drives the third locking mechanism 93 to unlock. At this time, it is only necessary to lift the fixed seat 11 upward. Under the gravity of the seat support 5 and the rear support rod 3, the sliding member 61 can slide downward along the front support rod 1, and the front connecting rod 62 pulls the seat support 5 to move closer to the front support rod 1, and the rear connecting rod 63 pulls the rear support rod 3 to move closer to the front support rod 1, thereby realizing the folding of the child stroller. The entire child stroller has few rods and a relatively simple structure. It only needs to slide the push rod 8 and the support rod 7 downward and lift them upward to realize folding. The folding operation is very convenient and fast, and can be operated with one hand. In order to ensure safety, the front end of the seat support 5 is rotatably connected to the front armrest 100, and a foldable and flexible seat cover 200 is provided between the push rod 8 and the seat support 5. When folding, the front armrest 100 is first rotated close to the seat support 5, and the seat cover 200 is flexible and foldable, so when the child stroller is folded, the seat cover 200 will be stacked together, and the seat cover 200 can be made of woven fabric.

[0033] like Figure 7As shown, a fourth locking mechanism 94 is provided between the seat support 5 and the fixed seat 11, which locks the two and can be triggered to unlock by the support rod 7 when the support rod 7 slides downward. Therefore, the child stroller is provided with a first locking mechanism 91 between the hand push rod 8 and the support rod 7, a second locking mechanism 92 between the support rod 7 and the front support rod 1, a third locking mechanism 93 between the sliding member 61 and the front support rod 1, and a fourth locking mechanism 94 between the seat support 5 and the fixed seat 11. Therefore, the child stroller is firmly locked in the unfolded state, and there will be no shaking of the parts, ensuring safety and reliability. Moreover, the unlocking of the second locking mechanism 92, the third locking mechanism 93 and the fourth locking mechanism 94 is linked, and no separate operation is required, so that the child stroller is very convenient and quick to fold, and can be folded with one hand.

[0034] like Fig. 9 and Fig.10 As shown, the first locking mechanism 91 comprises a first locking seat 911 disposed at the lower end of the hand push rod 8, a first locking pin 912 capable of moving laterally therein is disposed in the first locking seat 911, a first locking hole 913 capable of engaging with or disengaging from the first locking pin 912 is disposed on the support rod 7, a movable member 914 is disposed on the upper part of the hand push rod 8, a first pull cord 915 capable of pulling the first locking pin 912 out of the first locking hole 913 is disposed between the movable member 914 and the first locking pin 912, and a first reset spring 916 capable of pushing the first locking pin 912 to reset is also disposed between the first locking seat 911 and the first locking pin 912. When the movable member 914 moves, the first pull cord 915 is pulled, thereby pulling the first locking pin 912 out of the first locking hole 913, and at this time, the first locking mechanism 91 is unlocked, and the hand push rod 8 can slide relative to the support rod 7 and retract into the support rod 7.

[0035] like Figure 5 and Fig.10As shown, the movable member 914 includes a first sliding block 9141 that can slide relative to the hand push rod 8, the first pull rope 915 is arranged between the first sliding block 9141 and the first locking pin 912, the hand push rod 8 is provided with an exposed operating button 9142 that can push the first sliding block 9141 to slide, and the operating button 9142 is provided with a second lock slider 9143 that can slide relative to it, and the position where the second lock slider 9143 stays includes a locking position and an unlocking position. When the second lock slider 9143 stays in the locking position, it is fixed in the second lock slider. The blocking rod 9144 on the lock slider 9143 abuts against the blocking portion 9145 on the first slide block 9141 to prevent the operation button 9142 from being pressed. When the second lock slider 9143 slides to the unlocking position relative to the operation button 9142, the blocking rod 9144 is disengaged from the blocking portion 9145 so that the operation button 9142 can be pressed to drive the first slide block 9141 to slide. An elastic element 9146 is provided between the second lock slider 9143 and the operation button 9142 to push the second lock slider 9143 to reset from the unlocking position to the locking position. The second lock slider 9143 can prevent the first locking mechanism 91 from being mislocked due to the misoperation of the operation button 9142 to ensure safety. When the second lock slider 9143 stays in the locking position, the blocking rod 9144 abuts against the blocking portion 9145, and the operation button 9142 cannot be pressed at this time, so the operation button 9142 cannot push the first sliding block 9141 to slide, and thus the first pull rope 915 cannot be pulled, and the first locking mechanism 91 is not unlocked. When the second lock slider 9143 is slid to the unlocking position, the blocking rod 9144 is disengaged from the blocking portion 9145, and there is no obstruction when the operation button 9142 is pressed. When the operation button 9142 is pressed, the first sliding block 9141 slides relative to the hand push rod 8, and the first pull rope 915 pulls the first locking pin 912 out of the first locking hole 913. In this embodiment, the operation button 9142 and the first sliding block 9141 can achieve the action of both through the cooperation of the inclined walls.

[0036] like Figure 6 and Figure 8As shown, the second locking mechanism 92 includes a second locking hole 921 provided on the front support rod 1, a second locking seat 922 is provided at the lower end of the support rod 7, a second locking pin 923 is provided in the second locking seat 922 which can slide therein and engage or disengage with the second locking hole 921, a second sliding block 924 is also provided in the second locking seat 922 which can be pushed by the lower end of the hand push rod 8 to slide relative to the second locking seat 922 and push the second locking pin 923 to disengage from the second locking hole 921 during the sliding process, and a second reset spring 925 which can push the second locking pin 923 to reset is also provided between the second locking pin 923 and the second locking seat 922. When the hand push rod 8 slides downward, the lower end of the hand push rod 8 pushes the second sliding block 924, and the second sliding block 924 drives the second locking pin 923 to disengage from the second locking hole 921, thereby unlocking the second locking mechanism 92. Once unlocked, the support rod 7 can slide relative to the front support rod 1 and retract into the front support rod 1. In this embodiment, the second sliding block 924 and the second locking pin 923 may also interact with each other through the cooperation of the inclined walls, so that the movement of the second sliding block 924 is transmitted to the movement of the second locking pin 923 .

[0037] like Figure 6 and Figure 8 As shown, the sliding member 61 is a sliding sleeve mounted on the front support rod 1, and the third locking mechanism 93 includes a third locking seat 931 arranged on the sliding sleeve, and the third locking seat 931 is provided with a third locking pin 932 that can slide therein, and the front support rod 1 is provided with a third locking hole 933 that can engage with or disengage from the third locking pin 932, and the third locking pin 932 is provided with a third inclined surface 934 that can touch the lower end of the support rod 7 when the support rod 7 slides downward, so that the third locking pin 932 is disengaged from the third locking hole 933, and a third reset spring 935 that can push the third locking pin 932 to reset is also provided between the third locking seat 931 and the third locking pin 932. After the second locking mechanism 92 is unlocked, the support rod 7 slides downward, and the lower end of the support rod 7 pushes the third inclined surface 934, thereby pushing the third locking pin 932 out of the third locking hole 933 on the front support rod 1. At this time, the third locking mechanism 93 is unlocked, and the sliding sleeve can slide relative to the front support rod 1. When the fixing seat 11 is lifted upward, the sliding sleeve can slide downward along the front support rod 1, and the front connecting rod 62 and the rear connecting rod 63 can pull the seat support member 5 and the rear support rod 3 to rotate and move closer to the front support rod 1. In order to make the sliding sleeve unlocking the front support rod 1 more smoothly, an inclined wall 936 opposite to the third inclined surface 934 is also provided on the third locking pin 932. When the third inclined surface 934 is pushed by the support rod 7 and the third locking pin 932 withdraws from the third locking hole 933, the inclined wall 936 touches the lower edge of the third locking hole 933, which can make it easier for the sliding sleeve and the front support rod 1 to unlock and slide relative to each other.

[0038] like Figure 6 , Figure 8 and Fig.11 As shown, the fourth locking mechanism 94 includes a first connecting shell 941 provided on the fixing seat 11 and a second connecting shell 942 provided on the seat support 5, the first connecting shell 941 and the second connecting shell 942 are provided with a plurality of tooth grooves 943 along the circumferential direction, a spline 944 which can slide therein and can simultaneously engage with the tooth grooves 943 on the first connecting shell 941 and the second connecting shell 942 is provided in the space surrounded by the first connecting shell 941 and the second connecting shell 942, a pushing block 945 which can push the spline 944 to disengage from the tooth grooves 943 on the first connecting shell 941 is provided between the first connecting shell 941 and the spline 944, and a pushing block 945 which can slide relative to the spline 944 and can push the spline 944 to disengage from the tooth grooves 943 on the first connecting shell 941 is provided in the pushing block 945 The driving block 946 moves the push block 945 horizontally, the pushing block 945 is provided with a sixth inclined surface 94b, the driving block 946 is provided with a seventh inclined surface 94c abutting against the sixth inclined surface 94b, the support rod 7 is provided with a socket 947, the lower end of the driving block 946 is provided with a matching portion 948 inserted into the socket 947, the matching portion 948 is provided with a fourth inclined surface 949 which can be pushed by the edge of the socket 947 when the support rod 7 slides downward, a fourth reset spring 940 which can push the driving block 946 to reset is provided between the driving block 946 and the pushing block 945, and a fifth reset spring 94a which can push the spline 944 to reset is also provided between the second connecting shell 942 and the spline 944. When the support rod 7 slides downward, the upper edge of the socket 937 pushes the fourth inclined surface 949, so that the driving block 946 slides relative to the pushing block 945. During the sliding process, the seventh inclined surface 94c pushes the sixth inclined surface 94b, so that the pushing block 945 moves laterally and pushes the spline 944, thereby pushing the spline 944 out of the tooth groove 943 on the first connecting shell 941. At this time, the fourth locking mechanism 94 is unlocked. Therefore, the entire child stroller is locked by the first locking mechanism 91, the second locking mechanism 92, the third locking mechanism 93 and the fourth locking mechanism 94, ensuring that the child stroller is firmly locked in the unfolded state and is not prone to loosening and shaking, thereby ensuring safety. In addition, the unlocking of the second locking mechanism 92, the third locking mechanism 93 and the fourth locking mechanism 94 are all completed by the sliding and pushing action of the hand push rod 8 and the support rod 7, realizing linkage, making the unlocking operation of the child stroller easy. When the child stroller is folded, it is only necessary to operate the first locking mechanism 91 to unlock it, then slide the hand push rod 8 and the support rod 7, and then lift the child stroller to achieve folding. The folding operation can be performed with one hand, which is very convenient and quick.

[0039] The embodiment is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiment, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the present purpose.

Claims

1. A baby stroller, characterized in that: The invention comprises a front support rod (1), the lower end of the front support rod (1) is connected to a front wheel assembly (2), the upper end of the front support rod (1) is provided with a fixed seat (11), the lower part of the fixed seat (11) is rotatably connected to two rear support rods (3), the lower end of the rear support rod (3) is connected to a rear wheel assembly (4), the upper part of the fixed seat (11) is rotatably connected to a seat support member (5), a transmission mechanism is provided between the seat support member (5), the front support rod (1) and the rear support rod (3), which can make the seat support member (5) and the rear support rod (3) rotate relative to the fixed seat (11) and move closer to the front support rod (1), the transmission mechanism comprises a sliding member (61) provided on the front support rod (1) and capable of sliding along the front support rod (1), the sliding member (61) and the seat support member (5) are connected to each other. A front connecting rod (62) is provided between the sliding member (61) and the rear supporting rod (3) and is hinged to the two. A rear connecting rod (63) is provided between the sliding member (61) and the rear supporting rod (3) and is hinged to the two. A support rod (7) is provided in the front supporting rod (1) and is capable of sliding relative to the front supporting rod. A hand push rod (8) is provided in the support rod (7) and is capable of sliding relative to the front supporting rod. A first locking mechanism (91) is provided between the hand push rod (8) and the supporting rod (7). A second locking mechanism (92) is provided between the support rod (7) and the front supporting rod (1) and is capable of locking the two and is triggered to be unlocked by the hand push rod (8) when the hand push rod (8) slides downward. A third locking mechanism (93) is provided between the sliding member (61) and the front supporting rod (1) and is capable of locking the two and is triggered to be unlocked by the support rod (7) when the support rod (7) slides downward.

2. The baby stroller according to claim 1, characterized in that: A fourth locking mechanism (94) is provided between the seat support (5) and the fixing seat (11) for locking the two and can be triggered to be unlocked by the support rod (7) when the support rod (7) slides downward.

3. The stroller according to claim 2, characterized in that: The fourth locking mechanism (94) comprises a first connecting shell (941) provided on the fixing seat (11) and a second connecting shell (942) provided on the seat support member (5); the first connecting shell (941) and the second connecting shell (942) are provided with a plurality of tooth grooves (943) along the circumferential direction; a spline (944) capable of sliding therein and simultaneously engaging with the tooth grooves (943) on the first connecting shell (941) and the second connecting shell (942) is provided in the space enclosed by the first connecting shell (941) and the second connecting shell (942); a pushing block (945) capable of pushing the spline (944) to disengage from the tooth grooves (943) on the first connecting shell (941) is provided between the first connecting shell (941) and the spline (944); The pushing block (945) is provided with a driving block (946) which can slide relative to the pushing block (945) and can push the pushing block (945) to move horizontally when sliding; the support rod (7) is provided with a socket (947); the lower end of the driving block (946) is provided with a matching portion (948) inserted into the socket (947); the matching portion (948) is provided with a fourth inclined surface (949) which can be pushed by the edge of the socket (947) when the support rod (7) slides downward; a fourth reset spring (940) which can push the driving block (946) to reset is provided between the driving block (946) and the pushing block (945); and a fifth reset spring (94a) which can push the spline (944) to reset is provided between the second connecting shell (942) and the spline (944).

4. The stroller according to claim 3, characterized in that: The pushing block (945) is provided with a sixth inclined surface (94b), and the driving block (946) is provided with a seventh inclined surface (94c) abutting against the sixth inclined surface (94b).

5. The baby stroller according to claim 1 or 2, characterized in that: The sliding member (61) is a sliding sleeve sleeved on the front support rod (1); the third locking mechanism (93) comprises a third locking seat (931) arranged on the sliding sleeve; a third locking pin (932) capable of sliding therein is provided in the third locking seat (931); a third locking hole (933) capable of engaging with or disengaging from the third locking pin (932) is provided on the front support rod (1); a third inclined surface (934) is provided on the third locking pin (932) capable of contacting with the lower end of the support rod (7) when the support rod (7) slides downward, so that the third locking pin (932) is disengaged from the third locking hole (933); and a third reset spring (935) capable of pushing the third locking pin (932) to reset is also provided between the third locking seat (931) and the third locking pin (932).

6. The baby stroller according to claim 1 or 2, characterized in that: The first locking mechanism (91) comprises a first locking seat (911) arranged at the lower end of the hand push rod (8), a first locking pin (912) capable of moving laterally therein is arranged in the first locking seat (911), a first locking hole (913) capable of engaging with or disengaging from the first locking pin (912) is arranged on the support rod (7), a movable part (914) is arranged on the upper part of the hand push rod (8), a first pull rope (915) capable of pulling the first locking pin (912) to disengage from the first locking hole (913) is arranged between the movable part (914) and the first locking pin (912), and a first reset spring (916) capable of pushing the first locking pin (912) to reset is also arranged between the first locking seat (911) and the first locking pin (912).

7. The stroller according to claim 6, characterized in that: The movable part (914) includes a first sliding block (9141) that can slide relative to the hand push rod (8), the first pull rope (915) is arranged between the first sliding block (9141) and the first locking pin (912), the hand push rod (8) is provided with an exposed operating button (9142) that can push the first sliding block (9141) to slide, and the operating button (9142) is provided with a second lock slider (9143) that can slide relative to it, the position where the second lock slider (9143) stays includes a locking position and an unlocking position, when the second lock slider (9143) stays in the locking position, the second lock slider (9143) is fixed to the second lock slider ( The blocking rod (9144) on the second lock slider (9143) abuts against the blocking portion (9145) on the first sliding block (9141) to prevent the operating button (9142) from being pressed. When the second lock slider (9143) slides to the unlocking position relative to the operating button (9142), the blocking rod (9144) and the blocking portion (9145) are disengaged so that the operating button (9142) can be pressed to drive the first sliding block (9141) to slide. In addition, an elastic element (9146) is provided between the second lock slider (9143) and the operating button (9142) to push the second lock slider (9143) to reset from the unlocking position to the locking position.

8. The baby stroller according to claim 1 or 2, characterized in that: The second locking mechanism (92) comprises a second locking hole (921) provided on the front support rod (1); a second locking seat (922) is provided at the lower end of the support rod (7); a second locking pin (923) is provided in the second locking seat (922) and can slide therein and engage with or disengage from the second locking hole (921); a second sliding block (924) is also provided in the second locking seat (922) and can be pushed by the lower end of the hand push rod (8) to slide relative to the second locking seat (922) and push the second locking pin (923) to disengage from the second locking hole (921) during the sliding process; and a second reset spring (925) is also provided between the second locking pin (923) and the second locking seat (922) and can push the second locking pin (923) to reset.

9. The baby stroller according to claim 1, characterized in that: The front end of the seat support (5) is rotatably connected to a front armrest (100), and a foldable and flexible seat cover (200) is provided between the push rod (8) and the seat support (5).

10. The baby stroller according to claim 1, characterized in that: The front wheel assembly (2) comprises a transverse support (21) arranged at the lower end of the front support rod (1), and front wheels (22) are arranged on both sides of the transverse support (21).

Images