Baby stroller

Abstract

The utility model discloses a baby stroller which comprises a stroller frame mechanism, and connecting parts are arranged on the left side and the right side of the rear end of the stroller frame mechanism respectively. The lower end of the push rod mechanism is rotationally connected with the two connecting parts respectively, so that a hinged part is formed; the connecting rod mechanism comprises two pairs of folding connecting rods which are arranged left and right side by side at intervals, the upper ends of the two pairs of folding connecting rods are rotationally connected with the left and right sides of the upper end of the push rod mechanism respectively, and the lower ends are rotationally connected with the left and right sides of the front end of the frame mechanism respectively; the folding connecting rod can be switched between folding and folding towards the hinged position and unfolding away from the hinged position, and the folding connecting rod, the push rod mechanism and the frame mechanism define a triangle in the unfolding state. The baby stroller is simple in structure, thinner in height after being folded, convenient to store, capable of forming a triangle after being unfolded, high in stability and reliability and capable of improving use safety.

Description

TECHNICAL FIELD

[0001] The utility model relates to baby supplies technical field especially, relate to a baby stroller. BACKGROUND

[0002] Baby stroller is a kind of tool that baby goes out, in addition to the basic requirement of pursuing baby stroller's stability, safety, more and more value baby stroller's small size, light, foldable and other characteristics.

[0003] The existing baby stroller generally has folding function, but the frame structure is relatively complex, the stability of frame is poor after unfolding, and there is a potential safety hazard.Especially, the seat of the existing baby stroller is usually fixedly installed on the frame, which is inconvenient to disassemble and assemble, resulting in a large volume after folding, which is not conducive to storage. SUMMARY

[0004] The utility model aims at at least one of the problems existing in the prior art to some extent, and therefore the utility model provides a baby stroller, the frame body structure is simple, the height is thinner after folding, is convenient for storage, and forms a triangle after unfolding, is stable and reliable, improves use safety.

[0005] According to the baby stroller provided in the above, the following technical scheme is implemented:

[0006] A baby stroller, comprising a frame body, the frame body comprising: a frame mechanism, a connecting portion is arranged on the left and right sides of the rear end of the frame mechanism; a push rod mechanism, the lower end of the push rod mechanism is rotatably connected to two connecting portions to form a hinge; a connecting rod mechanism, comprising two pairs of folding connecting rods arranged side by side and spaced apart, the upper ends of the two pairs of folding connecting rods are rotatably connected to the left and right sides of the upper end of the push rod mechanism, and the lower ends are rotatably connected to the left and right sides of the front end of the frame mechanism, the folding connecting rod can be switched between folding and unfolding away from the hinge, and the folding connecting rod is surrounded by the push rod mechanism and the frame mechanism to form a triangle in the unfolded state.

[0007] In some embodiments, the folding connecting rod comprises a lower rod assembly and an upper rod assembly, the lower end of the lower rod assembly is rotatably connected to the left / right side of the front end of the frame mechanism, and the lower and upper ends of the upper rod assembly are rotatably connected to the left / right side of the upper end of the lower rod assembly and the upper end of the push rod mechanism, respectively.

[0008] In some embodiments, the lower rod assembly and the upper rod assembly are both arc-shaped, the upper rod assembly and the lower rod assembly are arranged in an upper convex arc shape in the unfolded state, and the upper rod assembly and the lower rod assembly are arranged at an angle when folded.

[0009] In some embodiments, the connecting rod mechanism further comprises a U-shaped connecting rod, and the upper ends of the two folding connecting rods are connected by the U-shaped connecting rod.

[0010] In some embodiments, the push rod mechanism comprises two push rod assemblies, a handrail assembly and two upper joints, the lower ends of the two push rod assemblies are respectively rotatably connected to the two connecting portions, the left and right ends of the handrail assembly are respectively rotatably connected to the upper ends of the two push rod assemblies through the two upper joints, and the upper ends of the two pairs of folding connecting rods are respectively rotatably connected to the two upper joints.

[0011] In some embodiments, the folding connecting rods are locked or unlocked with the corresponding upper joints or the frame mechanism through a first locking assembly, and / or the push rod assemblies are locked or unlocked with the connecting portions through a second locking assembly, and a unlocking assembly is movably arranged on the push rod assembly, and the unlocking assembly is linked with the second locking assembly.

[0012] In some embodiments, a seat mechanism is further arranged on the top of the frame mechanism, at least one mounting portion extending downward is arranged on the bottom of the seat mechanism, a connecting seat corresponding to the mounting portion is arranged on the top of the frame mechanism, and the connecting seat is detachably connected with the mounting portion.

[0013] In some embodiments, the connecting seat is provided with a receiving cavity opening upward, and clamping holes are arranged on the opposite cavity side walls of the receiving cavity; the mounting portion is inserted into the receiving cavity from top to bottom, an upper locking assembly is arranged on the mounting portion, and the upper locking assembly is respectively clamped with the two clamping holes.

[0014] In some embodiments, two cross bars are arranged on the top of the frame mechanism, the lower end of the connecting seat is inserted between the two cross bars, fixing portions are respectively arranged on the front and rear sides of the lower end of the connecting seat, and the fixing portions are connected with the corresponding cross bars.

[0015] In some embodiments, the fixing portions are provided with openings through which the cross bars pass, the cross bars are transversely inserted into the openings and are detachably connected with the fixing portions, and / or a lower locking assembly is arranged on the lower end of the connecting seat, and the lower locking assembly is respectively locked or unlocked with the two cross bars.

[0016] Compared with the prior art, the utility model has at least the following beneficial effects:

[0017] The utility model discloses a baby stroller, the frame body includes frame mechanism, push rod mechanism and collapsible and unfolded connecting rod mechanism, and the push rod mechanism lower extreme is rotatably connected in the frame mechanism rear end, and the upper and lower both ends of connecting rod mechanism are rotatably connected push rod mechanism upper end and frame mechanism front end, simple structure, and the frame body is more thin in the height after folding, is convenient for accomodating storage, and connecting rod mechanism under the unfolded state and push rod mechanism, frame mechanism jointly constitute triangle, to make the frame body after unfolding high firm reliability, improve use safety. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the explosion map of the frame body in the utility model embodiment 1;

[0019] Figure 2 It is the structural schematic diagram of the frame body in the unfolded state in the utility model embodiment 1;

[0020] Figure 3 It is the sectional view of the frame body in the utility model embodiment 1 Figure 1 ;

[0021] Figure 4 It is the sectional view of the frame body in the utility model embodiment 1 Figure 2 ;

[0022] Figure 5 It is the structural schematic diagram of the frame mechanism in the utility model embodiment 1;

[0023] Figure 6 It is the explosion map of the push rod mechanism in the utility model embodiment 1;

[0024] Figure 7 It is the explosion map of the upper rod subassembly and U type connecting rod in the utility model embodiment 1;

[0025] Figure 8 It is the state of the frame body in the folding process in the utility model embodiment 1 Figure 1 ;

[0026] Figure 9 It is the state of the frame body in the folding process in the utility model embodiment 1 Figure 2 ;

[0027] Figure 10 It is the structural schematic diagram of the frame body in the folding and folding state in the utility model embodiment 1;

[0028] Figure 11 It is the structural schematic diagram of the baby stroller in the utility model embodiment 2;

[0029] Figure 12 It is the sectional view of the baby stroller in the utility model embodiment 2;

[0030] Figure 13 is the structural schematic view of the connecting seat in the embodiment 2 of the utility model, and

[0031] Figure 14 is the structural schematic view of the seat mechanism in the embodiment 2 of the utility model.

[0032] In the drawing: 1-frame mechanism, 11-side support rod, 111-connection part, 12-crossbar, 13-front wheel assembly, 14-rear wheel assembly, 15-connecting seat, 151-receiving cavity, 152-clamping hole, 153-fixing part, 154-opening;

[0033] 2-push rod mechanism, 21-push rod assembly, 22-handrail assembly, 23-upper joint, 231-first locking groove;

[0034] 3-link mechanism, 31-lower rod assembly, 32-upper rod assembly, 320-connection joint, 321-second locking groove, 322-unlocking groove, 33-U-shaped link;

[0035] 41-first locking assembly, 411-locking piece, 412-unlocking piece, 42-second locking assembly, 43-unlocking assembly, 44-upper locking assembly, 441-locking tongue, 45-lower locking assembly, 451-locking part, 452-unlocking part; 5-seat mechanism, 51-mounting part. DETAILED DESCRIPTION

[0036] The following embodiments are used to illustrate the utility model, but the utility model is not limited by these embodiments. The specific embodiment of the utility model is modified or some technical features are replaced equivalently without departing from the spirit of the utility model scheme, and they should be covered in the technical scheme range of the utility model claimed.

[0037] Embodiment 1

[0038] Reference Figures 1-10 , the embodiment provides a baby stroller, the baby stroller includes a frame body, the frame body includes a frame mechanism 1 and a push rod mechanism 2, and the left and right sides of the rear end of the frame mechanism 1 are respectively provided with a connection part 111. The push rod mechanism 2 is arranged above the rear end of the frame mechanism 1, and the lower end of the push rod mechanism 2 is respectively connected to the two connection parts 111 to form a hinged part. In the embodiment, the push rod mechanism 2 can rotate relative to the frame mechanism 1, so that the push rod mechanism 2 can be folded and folded towards the frame mechanism 1, or the push rod mechanism 2 can be unfolded by rotating away from the frame mechanism 1, so that the push rod mechanism 2 and the frame mechanism 1 can be folded and folded or unfolded away from each other. When the push rod mechanism 2 and the frame mechanism 1 are folded and folded towards each other, the height of the frame body is thinner, the volume is smaller, and storage is facilitated.

[0039] Further, the frame body comprises a foldable and deployable linkage mechanism 3, which is arranged above the frame mechanism 1 and comprises two pairs of foldable linkages (not shown in the figure) arranged side by side and spaced apart, the upper ends of the two pairs of foldable linkages are respectively rotatably connected to the left and right sides of the upper end of the push rod mechanism 2, and the lower ends are respectively rotatably connected to the left and right sides of the front end of the frame mechanism 1. In this embodiment, the foldable linkages can be switched between folding and closing towards the hinge and unfolding away from the hinge. In the unfolded state, the foldable linkages, the push rod mechanism 2 and the frame mechanism 1 form a triangle to strengthen the overall strength of the frame body, and the foldable linkages do not interfere with the folding and closing of the push rod mechanism 2 and the frame mechanism 1 when folded. In addition, the linkage mechanism 3 can be configured to connect and fix the canopy of the stroller, so as to cover the seat mechanism 5 (see Figure 11 ) placed on the frame body by the canopy to achieve sun-shading effect.

[0040] It can be seen that by adding the foldable and deployable linkage mechanism 3 between the frame mechanism 1 and the push rod mechanism 2, the structure is simple, and the frame body does not interfere when folding. After folding, it is thinner and easier to store. Because the foldable linkages, the push rod mechanism 2 and the frame mechanism 1 form a triangle in the unfolded state, the left and right sides of the frame body are reliably strengthened to ensure that the frame body is more stable and reliable after unfolding, improving the safety of use.

[0041] Reference Figures 1-5 , the frame mechanism 1 comprises a support assembly (not shown in the figure), a front wheel assembly 13 and a rear wheel assembly 14, the front and rear ends of the support assembly are respectively fixedly connected to the front wheel assembly 13 and the rear wheel assembly 14, and the left and right sides of the rear end of the support assembly are respectively provided with a connection part 111 extending upward and rearward. Specifically, the support assembly comprises two side support rods 11 and at least two cross bars 12. The two side support rods 11 are arranged side by side and spaced apart in the left-right direction, and the front and rear ends of the two side support rods 11 are respectively connected to the front wheel assembly 13 and the rear wheel assembly 14. The rear ends of the two side support rods 11 extend upward and rearward to form the connection part 111. The at least two cross bars 12 are arranged spaced apart in the front-rear direction and connected between the two side support rods 11 to strengthen the overall strength of the support assembly. In this embodiment, the number of cross bars 12 is three, of which the two front cross bars 12 are U-shaped cross bars, and the two U-shaped cross bars are symmetrically arranged in the front-rear direction and can be configured to connect and fix the storage bag of the stroller. The other cross bar 12 is a strip-shaped cross bar, which is arranged between the rear U-shaped cross bar and the rear wheel assembly 14 to strengthen the strength of the support assembly and also to connect and fix the connection seat 15.

[0042] Further, the frame mechanism 1 further comprises at least one connection seat 15, which is detachably mounted on the top of the support assembly and used for detachably connecting the seat mechanism 5 (see Figure 11)。In the embodiment, the number of the connecting seats 15 is two, and the two connecting seats 15 are arranged side by side and spaced apart, and each of the two connecting seats 15 is detachably connected with the two cross rods 12 arranged close to the rear wheel assembly 14.

[0043] With reference to Figures 1-6 , the push rod mechanism 2 comprises two push rod assemblies 21, a handrail assembly 22, and two upper joints 23. The lower ends of the two push rod assemblies 21 are rotationally connected to the two connecting portions 111 of the frame mechanism 1, thereby forming two side rod groups. The left and right ends of the handrail assembly 22 are rotationally connected to the upper ends of the two push rod assemblies 21 through the two upper joints 23, and the upper ends of the two pairs of folding connecting rods are rotationally connected to the two upper joints 23. In the embodiment, the push rod assemblies 21 cannot rotate relative to the upper joints 23, while the handrail assembly 22 can rotate relative to the upper joints 23, so that the handrail assembly 22 can rotate about the upper joints 23 to be folded or unfolded, thereby reducing the space occupied by the push rod mechanism 2 after the frame body is folded.

[0044] Further, the push rod mechanism 2 further comprises a third locking assembly. The upper joints 23 and the handrail assembly 22 are locked or unlocked by the third locking assembly (not shown in the figure), so that the upper joints 23 cannot rotate relative to the handrail assembly 22 in the locked state, while the upper joints 23 can rotate relative to the handrail assembly 22 in the unlocked state.

[0045] With reference to Figures 1-7 , the folding connecting rod comprises a lower rod assembly 31 and an upper rod assembly 32. The lower end of the lower rod assembly 31 is rotationally connected to the left / right side of the front end of the frame mechanism 1, and the lower and upper ends of the upper rod assembly 32 are rotationally connected to the upper end of the lower rod assembly 31 and the left / right side of the upper end of the push rod mechanism 2, respectively. In the embodiment, the lower end of the lower rod assembly 31 is rotationally connected to the inner side wall of the side support rod 11 of the frame mechanism 1, and the upper end of the upper rod assembly 32 is rotationally connected to the inner side wall of the upper joint 23 of the push rod mechanism 2, so as to arrange the folding connecting rod between the two side rod groups, which not only ensures that the folding connecting rod does not interfere with the folding of the push rod assembly 2 and the frame mechanism 1 close to each other, but also hides the folded folding connecting rod between the two side rod groups, thereby reducing the space occupied by the connecting rod mechanism 3 in the left-right direction. In other embodiments, the two folding connecting rods can be arranged on the left and right outer sides of the two side rod groups to reserve the space between the two side rod groups for conveniently placing a seat mechanism with a larger volume.

[0046] In the embodiment, the lower rod assembly 31 and the upper rod assembly 32 are both arc-shaped, and the upper rod assembly 32 and the lower rod assembly 31 are arranged in an upper convex arc shape in the unfolded state (see Figure 2), so as to not only improve the appearance, connection strength and stability and reliability of the folding link when unfolded, but also increase the space between the link mechanism 3 and the frame mechanism 1 and the push rod mechanism 2. The upper rod assembly 32 and the lower rod assembly 31 are arranged at an angle when folded (see Figures 8-10 ), so as to reduce the occupied space after the folding link is folded.

[0047] Further, the link mechanism 3 further comprises a U-shaped link 33, and the upper ends of the two folding links are connected by the U-shaped link 33, so as to improve the strength of the link mechanism 3 after unfolding, and facilitate the tarpaulin connected to the link mechanism 3 to be in a taut state when unfolded. In this embodiment, a connecting joint 320 is arranged at the upper end of the upper rod assembly 32, and the upper end of the connecting joint 320 is connected and fixed to the U-shaped link 33, and the connecting joint 320 is connected to the upper joint 23 of the push rod mechanism 2.

[0048] Referring to Figures 1-4 , further, the upper end of the folding link is locked or unlocked with the corresponding upper joint 23 by the first locking assembly 41, so that the link mechanism 3 cannot be folded when locked, and is stably and reliably maintained in an unfolded state, and vice versa, the link mechanism 3 can be folded or unfolded when unlocked, facilitating the folding and storage of the frame body; and / or the lower end of the push rod assembly 21 is locked or unlocked with the connecting portion 111 by the second locking assembly 42, so as to lock the push rod mechanism 2 on the frame mechanism 1 by the second locking assembly 42. In addition, the unlocking assembly 43 is movably arranged on the push rod assembly 21, and the unlocking assembly 43 is linked to the second locking assembly 42, so as to control the unlocking of the locking assembly 42 by the unlocking assembly 43, and further facilitate the control of the folding of the push rod mechanism 1 and the frame mechanism 1.

[0049] Referring to Figures 4-7The first locking assembly 41 includes a locking member 411 and an unlocking member 412. A locking cavity is formed at the connection between the upper joint 23 and the folding link. In this embodiment, a first locking groove 231 facing the opening of the folding link is provided on the inner sidewall of the upper joint 23, and a second locking groove 321 facing the opening of the first locking groove 231 is provided on the connecting joint 320 of the folding link. The second locking groove 321 and the first locking groove 231 cooperate to form the locking cavity. An unlocking groove 322 with one end open and the other end connected to the locking cavity is provided on the connecting joint 320 of the folding link. The locking member 411 is movably disposed in the locking cavity and respectively engages the upper joint 23 of the push rod assembly 21 and the connecting joint 320 of the folding link. The unlocking member 412 is movably disposed in the unlocking groove 322 and abuts or gap-fits with the locking member 411. It is used to push the locking member 411 away from the connecting joint of the folding assembly, so that the locking member 411 and the connecting joint of the folding link are released from engagement, thereby allowing the linkage mechanism 3 to be folded or unfolded. In addition, the first locking assembly 41 also includes an elastic element (not shown in the figure). The elastic element is disposed in the locking cavity and located between the push rod assembly 21 and the locking element 411. It is used to always push the locking element 411 toward the folding link so that the locking element 411 engages with the connecting joint 320 of the folding link, thereby making the link mechanism 3 stably and reliably locked on the push rod mechanism 2, preventing the link mechanism 3 from folding, and effectively ensuring the stability, reliability and safety of the frame body after unfolding.

[0050] The following is combined with Figure 2 and Figures 7-10 To explain the working principle of the folding or unfolding of the frame body:

[0051] The frame body is in the unfolded state (see Figure 2 When the frame body needs to be folded, first unlock the locking relationship between the linkage mechanism 3 and the push rod mechanism 2, then press the two folding links of the linkage mechanism 3 downwards and backwards to fold the middle of the two folding links downwards and backwards (see...). Figure 8 Then, first release the locking relationship between the push rod mechanism 2 and the frame mechanism 1, and then push the push rod mechanism 2 to fold towards the frame mechanism 1 (see...). Figure 9 When the push rod mechanism 2 folds, it can simultaneously drive the upper rod assembly 32 to fold further toward the lower rod assembly 31 and the frame mechanism 1, until the upper ends of the push rod mechanism 2 and the upper rod assembly 32 are close to the front end of the frame mechanism 1 (see...). Figure 10 ).

[0052] Conversely, when the frame body needs to be unfolded, the locking relationship between the push rod mechanism 2 and the frame mechanism 1 is first released, and then the push rod mechanism 2 is held and swung downward and forward with force to unfold the push rod mechanism 2 away from the frame mechanism 1 until it is completely unfolded and locked again. Then, the locking relationship between the connecting rod mechanism 3 and the push rod mechanism 2 is first released, and then the folding link of the connecting rod mechanism 3 is pulled to move in the unfolding direction until the connecting rod mechanism 3 is completely unfolded and locked again.

[0053] Embodiment 2

[0054] Reference Figures 11-14 The difference between this embodiment and embodiment 1 is that the stroller further comprises a seat mechanism 5, which is arranged on the top of the frame mechanism 1 and in front of the push rod mechanism 2. At least one mounting portion 51 extends downward at the bottom of the seat mechanism 5. A connecting seat 15 is arranged on the top of the frame mechanism 1 corresponding to the position of the mounting portion. The connecting seat 15 and the mounting portion 51 are detachably connected. Thus, by cooperating the mounting portion of the seat mechanism 5 with the connecting seat 15 of the frame mechanism 1, the seat mechanism 5 is detachably mounted on the frame mechanism 1, which facilitates quick disassembly and assembly. When the stroller needs to be folded and stored, the seat mechanism 5 is first detached from the frame mechanism 1, and then the frame body is folded to reduce the occupied space after folding, which is more convenient for storing the frame body and the seat mechanism 5 separately.

[0055] Specifically, the connecting seat 15 is provided with an accommodating cavity 151 opening upward, and a clamping hole 152 is formed in each of the opposite cavity side walls of the accommodating cavity 151. The mounting portion 51 is inserted into the accommodating cavity 151 from top to bottom, and an upper locking assembly 44 is arranged on the mounting portion 51. The upper locking assembly 44 is provided with a lock tongue 441 corresponding to the position of the clamping hole 152. The two lock tongues 441 of the upper locking assembly 44 are respectively clamped with the two clamping holes 152, so as to detachably and stably install the seat mechanism 5 on the connecting seat 15 through the upper locking assembly.

[0056] Specifically, two cross bars 12 are arranged on the top of the frame mechanism 1 in front and back, and the lower end of the connecting seat 15 is inserted between the two cross bars 12. Fixed portions 153 are respectively protruded on the front and rear sides of the lower end of the connecting seat 15, and the fixed portions 153 are connected with the corresponding cross bars 12, so as to detachably install the connecting seat 15 on the frame mechanism 1.

[0057] In the embodiment, the fixing part 153 is provided with an opening 154 for the cross rod 12 to pass through, the cross rod 12 is transversely arranged in the opening 154 and is detachably connected with the fixing part 153 through a connecting member (for example, a screw); and / or the lower end of the connecting seat 15 is provided with a lower locking assembly 45, the lower locking assembly 45 is respectively locked or unlocked with the two cross rods 12, so as to realize the quick and predetermined positioning and mounting of the connecting seat 15 on the frame mechanism 1. Specifically, the lower locking assembly 45 is provided with two locking parts 451 and two unlocking parts 452, the two locking parts 451 are respectively arranged below the corresponding cross rod 12 and are used for limiting the lower position of the cross rod, so as to prevent the connecting seat from being upwardly separated; the two unlocking parts 452 are arranged above the corresponding cross rod and are respectively connected with the two locking parts 451.

[0058] The above only describes some embodiments of the present application. For those skilled in the art, without departing from the inventive concept, a number of modifications and improvements can be made, which are all within the protection scope of the present application.

Claims

1. A stroller, characterized in that, The frame body comprises: The frame mechanism (1) is provided with a connecting part (111) on the left and right sides of the rear end of the frame mechanism (1); The push rod mechanism (2) is rotatably connected to the two connecting parts (111) at the lower end to form a hinge; The connecting rod mechanism (3) comprises two pairs of folding connecting rods arranged side by side and spaced apart, the upper ends of the two pairs of folding connecting rods are rotatably connected to the left and right sides of the upper end of the push rod mechanism (2), and the lower ends are rotatably connected to the left and right sides of the front end of the frame mechanism (1), the folding connecting rod can be switched between folding and unfolding away from the hinge, and the folding connecting rod is surrounded by the push rod mechanism (2) and the frame mechanism (1) to form a triangle in the unfolded state.

2. A stroller according to claim 1, wherein, The folding connecting rod comprises a lower rod assembly (31) and an upper rod assembly (32), the lower end of the lower rod assembly (31) is rotatably connected to the left / right side of the front end of the frame mechanism (1), and the lower and upper ends of the upper rod assembly (32) are rotatably connected to the upper end of the lower rod assembly (31) and the left / right side of the upper end of the push rod mechanism (2), respectively.

3. A stroller according to claim 2, wherein, The lower rod assembly (31) and the upper rod assembly (32) are both arc-shaped, the upper rod assembly (32) and the lower rod assembly (31) are arranged in an upward convex arc shape in the unfolded state, and the upper rod assembly (32) and the lower rod assembly (31) are arranged at an angle when folded.

4. A stroller according to claim 1, wherein, The connecting rod mechanism (3) further comprises a U-shaped connecting rod (33), and the upper ends of the two folding connecting rods are connected through the U-shaped connecting rod (33).

5. A stroller according to any one of claims 1-4, characterized in that The push rod mechanism (2) comprises two push rod assemblies (21), a handrail assembly (22), and two upper joints (23), the lower ends of the two push rod assemblies (21) are rotatably connected to the two connecting parts (111), the left and right ends of the handrail assembly (22) are rotatably connected to the upper ends of the two push rod assemblies (21) through the two upper joints (23), and the upper ends of the two pairs of folding connecting rods are rotatably connected to the two upper joints (23).

6. A stroller according to claim 5, wherein, The folding connecting rod and the corresponding upper joint (23) or frame mechanism (1) are locked or unlocked through the first locking assembly (41); and / or the push rod assembly (21) and the connecting part (111) are locked or unlocked through the second locking assembly (42), and the unlocking assembly (43) is movably arranged on the push rod assembly (21), and the unlocking assembly (43) is linked with the second locking assembly (42).

7. A stroller according to claim 1, wherein, It also comprises a seat mechanism (5) arranged on the top of the frame mechanism (1), at least one mounting part (51) extending downward is arranged at the bottom of the seat mechanism (5), a connecting seat (15) is arranged at the position corresponding to the mounting part on the top of the frame mechanism (1), and the connecting seat (15) and the mounting part (51) are detachably connected.

8. A stroller according to claim 7, wherein, The connecting seat (15) is provided with an upwardly open accommodating cavity (151), and clamping holes (152) are formed in opposite cavity side walls of the accommodating cavity (151); the mounting part (51) is inserted into the accommodating cavity (151) from top to bottom, and an upper locking assembly (44) is arranged on the mounting part (51), and the upper locking assembly (44) is clamped with the two clamping holes (152) respectively.

9. A stroller according to claim 7, wherein, Two cross bars (12) are arranged at the top of the frame mechanism (1) and are spaced apart front and back, the lower end of the connecting seat (15) is inserted between the two cross bars (12), and a fixing part (153) is protruded on the front and back sides of the lower end of the connecting seat (15) respectively, and the fixing part (153) is connected with the corresponding cross bar (12).

10. A stroller according to claim 9, wherein, The fixing part (153) is provided with an opening (154) for the cross bar (12) to pass through, the cross bar (12) is transversely inserted into the opening (154) and is detachably connected with the fixing part (153); and / or a lower locking assembly (45) is arranged at the lower end of the connecting seat, and the lower locking assembly (45) is locked or unlocked with the two cross bars (12) respectively.

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