A child's pushchair

Abstract

The invention discloses a kind of children's stroller, it can be moved from unfolded state to folding state after unlocking locking device, including front leg assembly and rear leg assembly, the top of front leg assembly and rear leg assembly is equipped with the support seat capable of installing children's seat, the support seat is equipped with the extension rod capable of rotating relative to it around first axis and extending downward, the extension rod is equipped with the sliding piece connected with front leg assembly and rear leg assembly and can drive front leg assembly and rear leg assembly to fold when sliding relative to extension rod, the support seat is connected with the push rod assembly capable of rotating relative to it.The purpose of the present invention is to overcome the shortcomings of the prior art, provide a kind of children's stroller with simple folding structure and folding convenience.

Description

Technical Field

[0001] This invention relates to a children's stroller. Background Technology

[0002] With societal development, strollers have become an essential tool for infants and toddlers when traveling. Beyond the basic requirements of safety and sturdiness, parents are increasingly emphasizing features such as easy folding, compact size, and convenient storage. Therefore, current strollers generally feature a foldable design, unfolding when in use and folding when not in use for easy portability and to reduce space occupation. This invention also provides a new implementation scheme. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a children's stroller with a simple folding structure that is easy to fold.

[0004] This invention is achieved through the following technical solution:

[0005] A stroller for children, which can be moved from an unfolded state to a folded state after the locking device is unlocked, includes a front leg assembly 11 and a rear leg assembly 12. A support base 3 for mounting a child seat 2 is provided between the tops of the front leg assembly 11 and the rear leg assembly 12. An extension rod 41 is provided in the support base 3, which can rotate relative to it about a first axis A and extend downward. A sliding member 42 is provided on the extension rod 41, which is connected to the front leg assembly 11 and the rear leg assembly 12 and can drive the front leg assembly 11 and the rear leg assembly 12 to fold together when sliding relative to the extension rod 41. A push rod assembly 5 that can rotate relative to the support base 3 is connected to it.

[0006] The front leg assembly 11 includes a first front leg frame 111 rotatably connected to the front end of the support base 3 about a second axis B. A second front leg frame 112 is provided between the first front leg frame 111 and the sliding member 42. The lower end of the second front leg frame 112 is rotatably connected to the first front leg frame 111 about a third axis C. The upper end of the second front leg frame 112 is rotatably connected to the sliding member 42 about a fourth axis D. The lower end of the front leg assembly 11 is also provided with a front wheel 113. The rear leg assembly 12 includes a first rear leg frame 121 rotatably connected to the rear end of the support base 3 about a fifth axis E. A second rear leg frame 122 is provided between the first rear leg frame 121 and the sliding member 42. The lower end of the second rear leg frame 122 is rotatably connected to the first rear leg frame 121 about a sixth axis F. The upper end of the second rear leg frame 122 is rotatably connected to the sliding member 42 about a seventh axis G. The lower end of the rear leg assembly 12 is also provided with a rear wheel 123.

[0007] The locking device includes a first locking component 6 disposed between the sliding member 42, the extension rod 41, the front leg assembly 11, and the rear leg assembly 12. The first locking component 6 includes a locking position 61 disposed on the sliding member 42. The extension rod 41 is provided with a locking block 62 that can slide laterally relative to it and engage or disengage from the locking position 61. The extension rod 41 is also provided with a driving block 63 that can slide vertically relative to it and drive the locking block 62 to slide laterally. The support base 3 is provided with an operating handle 64 that can rotate relative to it. A first cable 65 is provided between the operating handle 64 and the driving block 63. A first elastic element 66 that can reset the locking block 62 is provided between the locking block 62 and the extension rod 41. A reset element 67 that can drive the operating handle 64 to reset is provided between the operating handle 64 and the support base 3. A second elastic element 68 that can reset the driving block 63 is provided between the driving block 63 and the extension rod 41.

[0008] The support base 3 includes a lower seat 31, to which an upper seat 32, which is rotatable relative to the lower seat 31 in the horizontal direction, is connected. A support frame 33, for mounting a child seat 2, is connected to the upper seat 32 and rotates with the upper seat 32 when it rotates relative to the lower seat 31. A push rod assembly 5 is rotatably connected to both sides of the support frame 33 and can drive the upper seat 32 and the support frame 33 to rotate in the horizontal direction. The possible positions of the push rod assembly 5 include... The trolley has a push position for pushing the trolley and a vertical position for rotating the upper seat 32 and the support frame 33 in the horizontal direction. A second locking component 7 is provided between the push rod assembly 5 and the support frame 33 to keep the push rod assembly 5 in the push position when locked. A locking component 81 is also provided between the push rod assembly 5, the lower seat 31, the upper seat 32 and the support frame 33 to lock the lower seat 31 and the upper seat 32 and to unlock the lower seat 31 and the upper seat 32 when the push rod assembly 5 rotates to the vertical position.

[0009] The lower seat 31, upper seat 32 and support frame 33 are also provided with a stop structure 82 that can prevent the push rod assembly 5 from continuing to rotate forward in the vertical position.

[0010] The positions where the upper seat 32 and support frame 33 stop include the forward position and the reverse position after rotating 180 degrees in the horizontal direction. The support frame 33 has a left connecting seat 331 and a right connecting seat 332 on its left and right sides. The push rod assembly 5 includes a left push rod 51 and a right push rod 52 rotatably connected to the left connecting seat 331 and the right connecting seat 332. The left push rod 51 has a left locking part 511, and the right push rod 52 has a right locking part 521. The stop structure 82 includes a left stop assembly 821 located between the left connecting seat 331 and the left push rod 51, and a right stop assembly 822 located between the right connecting seat 332 and the right push rod 52. The left stop assembly 821 includes a first left limiting block 8211 and a second left limiting block 8212 located on the left connecting seat 331 and capable of sliding outward or retracting relative to the left connecting seat 331, respectively. The right stop assembly... Component 822 includes a first right limiting block 8221 and a second right limiting block 8222 disposed on the right connecting seat 332 and capable of sliding outward or retracting inward relative to it. When the first left limiting block 8211 and the first right limiting block 8221 slide outward and the second left limiting block 8212 and the second right limiting block 8222 slide retract, the first left limiting block 8211 abuts against the left locking part 511 and the first right limiting block 8221 abuts against... The right locking part 521 blocks the left push rod 51 and the right push rod 52, thus preventing them from continuing to rotate forward. When the second left limiting block 8212 and the second right limiting block 8222 slide out and the first left limiting block 8211 and the first right limiting block 8221 slide back, the second left limiting block 8212 blocks the left locking part 511 and the second right limiting block 8222 blocks the right locking part 521, thus preventing the left push rod 51 and the right push rod 52 from continuing to rotate forward.

[0011] A first return spring 8213 is provided between the first left limiting block 8211 and the left connecting seat 331, and a second return spring 8214 is provided between the second left limiting block 8212 and the left connecting seat 331.

[0012] A third return spring 8223 is provided between the first right limiting block 8221 and the right connecting seat 332, and a fourth return spring 8224 is provided between the second right limiting block 8222 and the right connecting seat 332.

[0013] The stop structure 82 further includes a conversion component 823 disposed between the lower seat 31, the upper seat 32, the right stop assembly 822, and the left stop assembly 821. When the upper seat 32 and the support frame 33 are in the forward position, the conversion component 823 causes the first left limiting block 8211 and the first right limiting block 8221 to slide out and the second left limiting block 8212 and the second right limiting block 8222 to slide back. When the upper seat 32 and the support frame 33 are in the reverse position, the conversion component 823... Component 823 causes the second left limiting block 8212 and the second right limiting block 8222 to slide out and causes the first left limiting block 8211 and the first right limiting block 8221 to slide back. During the movement of the upper seat 32 and the support frame 33 from the forward position to the reverse position or from the reverse position to the forward position, the conversion component 823 causes the first left limiting block 8211, the first right limiting block 8221, the second left limiting block 8212 and the second right limiting block 8222 to slide out simultaneously.

[0014] The conversion assembly 823 includes a first right slider 8231 slidably disposed on the front side of the upper seat 32, a first left slider 8232 slidably disposed on the first right slider 8231, a second cable 8233 between the first left slider 8232 and the first left limiting block 8211, a third cable 8234 between the first right slider 8231 and the first right limiting block 8221, a fifth return spring 8235 and a sixth return spring 8236 between the first right slider 8231 and the first left slider 8232, which can push the two together and make them slide away from each other, and the lower seat 31 is provided with a mechanism to push the first left slider 823. 2. The first pressing block 8237, which causes the first right slider 8231 and the first left slider 8232 to slide closer to each other, and the second cable 8233 and the third cable 8234 are in a relaxed state when the first right slider 8231 and the first left slider 8232 slide away from each other, causing the first left limiting block 8211 and the first right limiting block 8221 to slide out and thus prevent the left push rod 51 and the right push rod 52 from continuing to rotate forward. When the first right slider 8231 and the first left slider 8232 slide closer to each other and the second cable 8233 and the third cable 8234 are in a taut state, the first left limiting block 8211 and the first right limiting block 8221 slide back and thus make way for the left push rod 51 and the right push rod 52.

[0015] The upper seat 32 is provided with a second right slider 8238 that can slide relative to it on its rear side. A second left slider 8239 that can slide relative to it is provided on the second right slider 8238. A fourth cable 823a is provided between the second left slider 8239 and the second left limiting block 8212. A fifth cable 823b is provided between the second right slider 8238 and the second right limiting block 8222. A seventh return spring 823c and an eighth return spring 823d are provided between the second right slider 8238 and the second left slider 8239 to push them together and cause them to slide away from each other. The lower seat 31 is provided with a mechanism to push the second left slider 823. 9. The second top block 823e slides closer to the second right slider 8238. When the second right slider 8238 slides further away from the second left slider 8239, the fourth cable 823a and the fifth cable 823b are in a relaxed state, causing the second left limit block 8212 and the second right limit block 8222 to slide out and prevent the left push rod 51 and the right push rod 52 from continuing to rotate forward. When the second right slider 8238 slides closer to the second left slider 8239, the second cable 8233 and the third cable 8234 are in a taut state, causing the second left limit block 8212 and the second right limit block 8222 to slide back and make way for the left push rod 51 and the right push rod 52.

[0016] The lower seat 31 is provided with a protrusion 823f on its rear side, which can push the first pressing block 8237 or the second pressing block 823e upward when the upper seat 32 rotates relative to the lower seat 31 on the horizontal plane.

[0017] The second locking assembly 7 includes a left locking assembly 71 located between the left connecting seat 331 and the left push rod 51 and a right locking assembly 72 located between the right connecting seat 332 and the right push rod 52. The left locking assembly 71 includes a first left locking position 711 and a second left locking position 712 located on the left connecting seat 331. The left locking part 511 is a left locking block located inside the left push rod 51 and capable of sliding relative to it. The left locking block is provided with a left locking protrusion 5111 that can be locked into the first left locking position 711 or the second left locking position 712. A left elastic element 713 is provided between the left locking part 511 and the left push rod 51. The left push rod 51 is also provided with a left operating member 714 that slides the left locking part 511 during operation. A left pull cable 715 is provided between the left operating member 714 and the left locking part 511.

[0018] The right locking assembly 72 includes a first right locking position 721 and a second right locking position 722 disposed on the right connecting seat 332. The right locking part 521 is a right locking block disposed in the right push rod 52 and capable of sliding relative to it. The right locking block is provided with a right locking protrusion 5211 that can be locked into the first right locking position 721 or the second right locking position 722. A right elastic element 723 is provided between the right locking block and the right push rod 52. The right push rod 52 is also provided with a right operating member 724 that drives the right locking part 521 to slide during operation. A right pull cable 725 is provided between the right operating member 724 and the right locking part 521.

[0019] When the upper seat 32 and support frame 33 are in the forward position, the left locking part 511 is engaged in the first left locking position 711 and the right locking part 521 is engaged in the first right locking position 721. When the upper seat 32 and support frame 33 are in the reverse position, the left locking part 511 is engaged in the second left locking position 712 and the right locking part 521 is engaged in the second right locking position 722.

[0020] The locking assembly 81 includes a left locking assembly 811 disposed between the left push rod 51, the lower seat 31, the upper seat 32, and the support frame 33, and a right locking assembly 812 disposed between the right push rod 52, the lower seat 31, the upper seat 32, and the support frame 33. The left locking assembly 811 includes a locking position 8111 on the lower seat 31. The support frame 33 is provided with a locking block 8112 that can slide relative to it and engage or disengage from the locking position 8111. The support frame 33 is also provided with a sliding block 8113 that can slide up and down relative to it. A sixth cable 8114 is provided between the sliding block 8113 and the locking block 8112, which drives the locking block 8112 to slide and disengage from the locking position 8111 when the sliding block 8113 slides. The support frame 33 is provided with a driving slider 8115 that can slide laterally relative to it and drive the sliding block 8113 to slide. The driving slider 8115 is provided with a first inclined sliding surface 81151 and a second inclined sliding surface 81152 in opposite directions. The push rod assembly 5 is provided with a third inclined sliding surface 8116 and a fourth inclined sliding surface 8117 that can press against the first inclined sliding surface 81151 and the second inclined sliding surface 81152 respectively to make the driving slider 8115 slide. A ninth return spring 8118 is provided between the driving slider 8115 and the support frame 33. A tenth return spring 8119 is provided between the locking block 8112 and the support frame 33. An eleventh return spring 811a is provided between the sliding block 8113 and the support frame 33.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. When you need to fold this stroller, first unlock the locking device, then push the push rod assembly to rotate backward relative to the support seat and move towards the rear leg assembly. Lift the support seat upward, and the front and rear leg assemblies will rotate relative to the support seat due to their gravity. The slider will slide upward along the extension rod until the front and rear leg assemblies come together and the folding is complete. The folding process is smooth and the folding operation is simple.

[0023] 2. When the support base is lifted, the weight of the first front leg causes it to rotate relative to the front end of the support base around the second axis B and move towards the rear leg assembly. During the rotation of the first front leg, the lower end of the second front leg rotates relative to the first front leg around the third axis C, and the upper end of the second front leg rotates relative to the slider around the fourth axis D and pushes the slider upward along the extension rod. At this time, the second and first front leg frames move towards the rear leg assembly. Simultaneously, the weight of the first rear leg causes it to rotate relative to the rear end of the support base around the fifth axis E and move towards the front leg. During the rotation of the first rear leg, the lower end of the second rear leg rotates relative to the first rear leg around the sixth axis F, and the upper end of the second rear leg rotates relative to the slider around the seventh axis G and pushes the slider upward along the extension rod. At this time, the second and first rear leg frames move towards the front leg assembly, and the rear and front leg assemblies rotate and move closer to each other. Attached Figure Description

[0024] Figure 1 This is one of the perspective views of the stroller of the present invention;

[0025] Figure 2 This is a diagram showing the state of the stroller of the present invention when the upper seat and support frame are in the forward position and the push rod assembly is in the push position.

[0026] Figure 3 This is a diagram showing the state of the stroller of the present invention with the upper seat and support frame in the forward position and the push rod assembly in the vertical position.

[0027] Figure 4 This is a diagram showing the state of the stroller of the present invention when the upper seat and support frame are in the reverse position and the push rod assembly is in the vertical position.

[0028] Figure 5 This is a diagram showing the state of the stroller of the present invention when the upper seat and support frame are in the reverse position and the push rod assembly is in the push position.

[0029] Figure 6 This is the second perspective view of the stroller of the present invention;

[0030] Figure 7 This is a cross-sectional view of the extension rod and sliding component in the stroller of the present invention;

[0031] Figure 8This is a cross-sectional view of the first locking component in the stroller of the present invention;

[0032] Figure 9 This is an exploded view of the first locking component in the stroller of the present invention;

[0033] Figure 10 This is an exploded view of the support seat in the stroller of the present invention;

[0034] Figure 11 This is one of the exploded views of the left locking component and the right locking component in the stroller of the present invention;

[0035] Figure 12 This is the second exploded view of the left locking component and the right locking component in the stroller of the present invention;

[0036] Figure 13 This is one of the state diagrams of the left locking block, right locking block, left stop assembly, right stop assembly and conversion assembly when the upper seat and support frame of the stroller of the present invention are in the forward position and the push rod assembly is in the vertical position;

[0037] Figure 14 This is the second state diagram of the left locking block, right locking block, left stop assembly, right stop assembly and conversion assembly when the upper seat and support frame of the stroller of the present invention are in the forward position and the push rod assembly is in the vertical position;

[0038] Figure 15 This is one of the state diagrams of the left locking block, right locking block, left stop assembly, right stop assembly and conversion assembly when the push rod assembly of the stroller of the present invention is in the vertical position and the upper seat and support frame move from the forward position to the reverse position;

[0039] Figure 16 This is the second state diagram of the left locking block, right locking block, left stop assembly, right stop assembly and conversion assembly when the push rod assembly of the stroller of the present invention is in the vertical position and the upper seat and support frame move from the forward position to the reverse position.

[0040] Figure 17 This is one of the state diagrams of the left locking block, right locking block, left stop assembly, right stop assembly and conversion assembly when the upper seat and support frame of the stroller of the present invention are in the reverse position and the push rod assembly is in the vertical position;

[0041] Figure 18 This is the second state diagram of the left locking block, right locking block, left stop assembly, right stop assembly and conversion assembly when the upper seat and support frame of the stroller of the present invention are in the reverse position and the push rod assembly is in the vertical position;

[0042] Figure 19 This is an exploded view of the conversion component of the stroller of the present invention;

[0043] Figure 20This is a cross-sectional view of the left stop assembly and the right stop assembly of the stroller of the present invention;

[0044] Figure 21 This is a perspective view of the lower seat of the stroller of the present invention;

[0045] Figure 22 This is an exploded view of the locking assembly of the stroller of the present invention;

[0046] Figure 23 This is a cross-sectional view of the locking assembly of the stroller of the present invention;

[0047] Figure 24 This is a perspective view of the push rod assembly of the stroller of the present invention;

[0048] Figure 25 This is a perspective view of the positioning component of the stroller of the present invention;

[0049] Figure 26 This is a diagram showing the state of the stroller when it is folded.

[0050] Figure 27 This is an exploded view of the support seat in the stroller of the present invention; Detailed Implementation

[0051] The present invention will now be further described with reference to the accompanying drawings:

[0052] like Figures 1 to 27 As shown, the present invention provides a child stroller that can move from an unfolded state to a folded state after the locking device is unlocked. It includes a front leg assembly 11 and a rear leg assembly 12. A support base 3 for mounting a child seat 2 is provided between the tops of the front leg assembly 11 and the rear leg assembly 12. An extension rod 41 that can rotate relative to the support base 3 and extend downward is provided. A sliding member 42 that is connected to the front leg assembly 11 and the rear leg assembly 12 and can drive the front leg assembly 11 and the rear leg assembly 12 to fold together when sliding relative to the extension rod 41 is provided. A push rod assembly 5 that can rotate relative to the support base 3 is connected to the support base 3.

[0053] When you need to fold this stroller, first unlock the locking device, then push the push rod assembly 5 to rotate backward relative to the support seat 3 and move towards the rear leg assembly 12. Lift the support seat 3 upward, and the front leg assembly 11 and the rear leg assembly 12 will rotate relative to the support seat 3 due to their gravity. The slider 42 will slide upward along the extension rod 41 until the front leg assembly 11 and the rear leg assembly 12 come together and the folding is completed. The folding process is smooth and the folding operation is simple.

[0054] like Figure 2 , Figure 7 and Figure 26As shown, the front leg assembly 11 includes a first front leg frame 111 rotatably connected to the front end of the support base 3 about a second axis B. A second front leg frame 112 is provided between the first front leg frame 111 and the sliding member 42. The lower end of the second front leg frame 112 is rotatably connected to the first front leg frame 111 about a third axis C. The upper end of the second front leg frame 112 is rotatably connected to the sliding member 42 about a fourth axis D. The lower end of the front leg assembly 11 is also provided with a front wheel 113. The rear leg assembly 12 includes a first rear leg frame 121 rotatably connected to the rear end of the support base 3 about a fifth axis E. A second rear leg frame 122 is provided between the first rear leg frame 121 and the sliding member 42. The lower end of the second rear leg frame 121 is rotatably connected to the first rear leg frame 121 about a sixth axis F. The upper end of the second rear leg frame 122 is rotatably connected to the sliding member 42 about a seventh axis G. The lower end of the rear leg assembly 12 is also provided with a rear wheel 123.

[0055] When the support base 3 is lifted, the weight of the first front leg frame 111 causes it to rotate relative to the front end of the support base 3 around the second axis B and move towards the rear leg assembly 12. During the rotation of the first front leg frame 111, the lower end of the second front leg frame 112 rotates relative to the first front leg frame 111 around the third axis C, and the upper end of the second front leg frame 112 rotates relative to the sliding member 42 around the fourth axis D and pushes the sliding member 42 to slide upward along the extension rod 41. At this time, the second front leg frame 112 and the first front leg frame 111 move towards the rear leg assembly 12, while the first rear leg frame... The weight of the first rear leg 121 causes it to rotate relative to the rear end of the support base 3 around the fifth axis E and move towards the front leg 11. During the rotation of the first rear leg 121, the lower end of the second rear leg 122 rotates relative to the first rear leg 121 around the sixth axis F, and the upper end of the second rear leg 122 rotates relative to the slider 42 around the seventh axis G, pushing the slider 42 upwards along the extension rod 41. At this time, the second rear leg 122 and the first rear leg 121 move towards the front leg assembly 11, and the rear leg assembly 12 and the front leg assembly 11 rotate and move closer together. The second rear leg 122 and the second front leg 112 are used to support the entire stroller when it is unfolded, making the stroller more stable and the child safer.

[0056] The seventh axis G is coaxial with the fourth axis D. This allows the rear leg assembly 12 and the front leg assembly 11 to rotate and come together synchronously, making the folding operation smoother.

[0057] like Figure 2 and Figure 6 As shown, the locking device includes a first locking component 6 disposed between the slider 42, the extension rod 41, the front leg assembly 11, and the rear leg assembly 12. The first locking component 6 is used to lock the slider 42, the extension rod 41, the front leg assembly 11, and the rear leg assembly 12 in the deployed state.

[0058] like Figures 8 to 9 As shown, the first locking assembly 6 includes a locking position 61 on the sliding member 42. The extension rod 41 has a locking block 62 that can slide laterally relative to it and engage or disengage from the locking position 61. The extension rod 41 also has a driving block 63 that can slide vertically relative to it and drive the locking block 62 to slide laterally. The support base 3 has an operating handle 64 that can rotate relative to it. A first cable 65 is provided between the operating handle 64 and the driving block 63. A first elastic element 66 that can reset the locking block 62 is provided between the locking block 62 and the extension rod 41. A reset element 67 that can drive the operating handle 64 to reset is provided between the operating handle 64 and the support base 3. A second elastic element 68 that can reset the driving block 63 is provided between the driving block 63 and the extension rod 41. The reset element 67 is a torsion spring. When the torsion spring is in its original state, the operating handle 64 is positioned downwards. When the operating handle 64 is rotated upwards to unlock, the torsion spring is compressed by force. Therefore, when the operating handle 64 is turned upward, a certain force needs to be applied to overcome the elastic force of the torsion spring, which can prevent accidental contact with the operating handle 64 and unlocking of the first locking component 6, making it safer. When it is necessary to unlock the first locking component 6, the operating handle 64 is turned upward. When the operating handle 64 is turned upward, it pulls the first cable 65. When the first cable 65 is pulled, it drives the drive block 63 to slide. The inclined surface on the drive block 63 pushes against the inclined surface on the locking block 62, so that when the drive block 63 slides vertically, the locking block 62 slides horizontally and disengages from the locking position 61. At this time, the first locking component 6 is unlocked, and the sliding member 42 can slide upward relative to the extension rod 41, causing the front leg component 11 and the rear leg component 12 to move closer and fold. After the first locking component 6 is unlocked, the operating handle 64 is pulled up again to make the rear leg component 12 and the front leg component 11 rotate relative to each other and move closer and fold.

[0059] like Figures 2 to 5As shown, the support base 3 includes a lower seat 31, on which an upper seat 32, which can rotate relative to the lower seat 31 in the horizontal direction, is connected. A support frame 33, used for mounting a child seat 2, is connected to the upper seat 32 and rotates with the upper seat 32 when it rotates relative to the lower seat 31. A push rod assembly 5 is rotatably connected to both sides of the support frame 33 and can drive the upper seat 32 and the support frame 33 to rotate in the horizontal direction to achieve forward and backward reversal of the upper seat 32 and the support frame 33. The positions that the push rod assembly 5 can stop include a pushing position for pushing the trolley and a vertical position for rotating the upper seat 32 and support frame 33 in the horizontal direction. A second locking component 7 is provided between the push rod assembly 5 and the support frame 33 to keep the push rod assembly 5 in the pushing position when locked. A locking component 81 is also provided between the push rod assembly 5, lower seat 31, upper seat 32, and support frame 33 to lock the lower seat 31 and upper seat 32 and to unlock the lower seat 31 and upper seat 32 when the push rod assembly 5 rotates to the vertical position. After unlocking the second locking component 7, the push rod assembly 5 can switch between the pushing position and the vertical position. The push rod assembly 5 on the stroller of this invention has two positions: a push position and a vertical position. When the push rod assembly 5 is in the push position, an adult can push the stroller frame forward using the push rod assembly 5. When the push rod assembly 5 rotates forward from the push position to the vertical position, the locking assembly 81 unlocks when the push rod assembly 5 moves from the push position to the vertical position. At this time, the upper seat 32 can rotate relative to the lower seat 31. The adult can hold the push rod assembly 5 in the vertical position and rotate the upper seat 32 and the support frame 33 in the horizontal direction. When the upper seat 32 and the support frame 33 rotate 180 degrees, the child seat 2 completes the front-to-back reversal, and the child seat 2 faces the adult. Therefore, when the adult operates the child seat 2 to reverse direction, they only need to rotate the push rod assembly 5 forward in the vertical direction to move the push rod assembly 5 from the push position to the vertical position, and then rotate the push rod assembly 5 in the horizontal direction. The operation is very convenient and quick.

[0060] like Figures 13 to 19 As shown, a stop structure 82 is provided between the lower seat 31, the upper seat 32, and the support frame 33 to prevent the push rod assembly 5 from continuing to rotate forward in the vertical position. The stop structure 82 prevents the push rod assembly 5 from continuing to rotate forward when it is in the vertical position, avoiding accidental forward rotation of the push rod assembly 5 due to unbalanced force when applying horizontal torque to the push rod assembly 5 in the vertical position, thus ensuring safety. Moreover, after the child seat 2 has been reversed, the stop structure 82 also ensures that the push rod assembly 5 can only rotate backward to return to the push position, ensuring the reliability of the stroller.

[0061] like Figures 13 to 19As shown, the positions where the upper seat 32 and support frame 33 stop include the forward position and the reverse position after rotating 180 degrees in the horizontal direction. The support frame 33 is provided with a left connecting seat 331 and a right connecting seat 332 on its left and right sides. The push rod assembly 5 includes a left push rod 51 and a right push rod 52 rotatably connected to the left connecting seat 331 and the right connecting seat 332. The stop structure 82 includes a left stop assembly 821 located between the left connecting seat 331 and the left push rod 51 and a stop assembly 821 located on the right connecting seat 332. The right stop assembly 822 between the left connecting seat 332 and the right push rod 52 includes a left locking part 511 on the left push rod 51 and a right locking part 521 on the right push rod 52. The stop structure 82 includes a left stop assembly 821 between the left connecting seat 331 and the left push rod 51 and a right stop assembly 822 between the right connecting seat 332 and the right push rod 52. The left stop assembly 821 includes components that are mounted on the left connecting seat 331 and can slide outward relative to the left connecting seat 331. The first left limiting block 8211 and the second left limiting block 8212 extend or retract. The right stop assembly 822 includes a first right limiting block 8221 and a second right limiting block 8222 disposed on the right connecting seat 332 and slidably extend outward or retract inward relative to it. When the first left limiting block 8211 and the first right limiting block 8221 extend and the second left limiting block 8212 and the second right limiting block 8222 retract, the first left limiting block 8211 abuts against the left stop. The locking part 511 and the first right limiting block 8221 abut against the right locking part 521, thereby preventing the left push rod 51 and the right push rod 52 from continuing to rotate forward. When the second left limiting block 8212 and the second right limiting block 8222 slide out and the first left limiting block 8211 and the first right limiting block 8221 slide back, the second left limiting block 8212 abuts against the left locking part 511 and the second right limiting block 8222 abuts against the right locking part 521, thereby preventing the left push rod 51 and the right push rod 52 from continuing to rotate forward.

[0062] A first return spring 8213 is provided between the first left limiting block 8211 and the left connecting seat 331, and a second return spring 8214 is provided between the second left limiting block 8212 and the left connecting seat 331.

[0063] A third return spring 8223 is provided between the first right limiting block 8221 and the right connecting seat 332, and a fourth return spring 8224 is provided between the second right limiting block 8222 and the right connecting seat 332. The push rod assembly 5 also includes a hand push rod 53 located between the left push rod 51 and the right push rod 52, which is convenient for adults to push.

[0064] To prevent the left push rod 51 and right push rod 52 from rotating further forward relative to the support frame 33 to a vertical position, a stop structure 82 is provided. When the upper body 32 and support frame 33 are in the forward position and the left push rod 51 and right push rod 52 move from the push position to the vertical position, the first left limit block 8211 and the first right limit block 8221 slide out, and the second left limit block 8212 and the second right limit block 8222 slide back. At this time, the first left limit block 8211 abuts against the left locking part 511, and the first right limit block 8221 abuts against the right locking part 521, thus preventing the left push rod 51 and right push rod 52 from continuing to rotate forward from the vertical position. When the upper seat 32 and the support frame 33 rotate to the reverse position, the second left limit block 8212 and the second right limit block 8222 slide out and the first left limit block 8211 and the first right limit block 8221 slide back. Due to the reversal, the second left limit block 8212 and the second right limit block 8222 are located in front, and the first left limit block 8211 and the second right limit block 8222 are located in the rear. At this time, the second left limit block 8212 abuts against the left locking part 511 and the second left limit block 8212 abuts against the right locking part 521, so that the left push rod 51 and the right push rod 52 cannot continue to rotate forward from the vertical position, but can only move from the vertical position to the push position.

[0065] The stop structure 82 further includes a conversion component 823 disposed between the lower seat 31, the upper seat 32, the right stop assembly 822, and the left stop assembly 821. When the upper seat 32 and the support frame 33 are in the forward position, the conversion component 823 causes the first left limiting block 8211 and the first right limiting block 8221 to slide out and the second left limiting block 8212 and the second right limiting block 8222 to slide back. When the upper seat 32 and the support frame 33 are in the reverse position, the conversion component 823... Component 823 causes the second left limiting block 8212 and the second right limiting block 8222 to slide out and the first left limiting block 8211 and the first right limiting block 8221 to slide back. During the movement of the upper seat 32 and the support frame 33 from the forward position to the reverse position or from the reverse position to the forward position, the conversion component 823 causes the first left limiting block 8211, the first right limiting block 8221, the second left limiting block 8212, and the second right limiting block 8222 to slide out simultaneously. The conversion component 823 ensures that the left push rod 51 and the right push rod 52 can only rotate backward from the vertical position back to the push position, ensuring the reliability of the trolley's use. As the upper seat 32 and support frame 33 move from the forward position to the reverse position, the conversion component 823 causes the first left limiting block 8211, the first right limiting block 8221, the second left limiting block 8212, and the second right limiting block 8222 to slide out simultaneously. At this time, the left locking part 511 is clamped between the first left limiting block 8211 and the second left limiting block 8212, and the right locking part 521 is clamped between the first right limiting block 8221 and the second right limiting block 8222. This also ensures that the left push rod 51 and the right push rod 52 will not rotate back and forth when the upper seat 32 and support frame 33 rotate, making it safer.

[0066] like Figures 13 to 19As shown, the conversion assembly 823 includes a first right slider 8231 slidably disposed on the front side of the upper seat 32, a first left slider 8232 slidably disposed on the first right slider 8231, a second cable 8233 between the first left slider 8232 and the first left limiting block 8211, a third cable 8234 between the first right slider 8231 and the first right limiting block 8221, a fifth return spring 8235 and a sixth return spring 8236 between the first right slider 8231 and the first left slider 8232, which can push the two together and make them slide away from each other. The lower seat 31 is provided with a mechanism to push the first left slider 8232. The first pressing block 8237, which causes the first right slider 8231 and the first left slider 8232 to slide closer to each other, and the second cable 8233 and the third cable 8234, which are in a relaxed state when the first right slider 8231 and the first left slider 8232 slide away from each other, causes the first left limiting block 8211 and the first right limiting block 8221 to slide out, thereby preventing the left push rod 51 and the right push rod 52 from continuing to rotate forward. When the first right slider 8231 and the first left slider 8232 are relatively close and the second cable 8233 and the third cable 8234 are in a taut state, the first left limiting block 8211 and the first right limiting block 8221 slide back, thereby making way for the left push rod 51 and the right push rod 52.

[0067] The upper seat 32 is provided with a second right slider 8238 that can slide relative to it on its rear side. A second left slider 8239 that can slide relative to it is provided on the second right slider 8238. A fourth cable 823a is provided between the second left slider 8239 and the second left limiting block 8212. A fifth cable 823b is provided between the second right slider 8238 and the second right limiting block 8222. A seventh return spring 823c and an eighth return spring 823d are provided between the second right slider 8238 and the second left slider 8239 to push them together and cause them to slide away from each other. The lower seat 31 is provided with a mechanism to push the second left slider 823. 9. The second top block 823e slides closer to the second right slider 8238. When the second right slider 8238 slides further away from the second left slider 8239, the fourth cable 823a and the fifth cable 823b are in a relaxed state, causing the second left limit block 8212 and the second right limit block 8222 to slide out and prevent the left push rod 51 and the right push rod 52 from continuing to rotate forward. When the second right slider 8238 slides closer to the second left slider 8239, the second cable 8233 and the third cable 8234 are in a taut state, causing the second left limit block 8212 and the second right limit block 8222 to slide back and make way for the left push rod 51 and the right push rod 52.

[0068] The lower seat 31 is provided with a protrusion 823f on its rear side, which can push the first pressing block 8237 or the second pressing block 823e upward when the upper seat 32 rotates relative to the lower seat 31 on the horizontal plane.

[0069] When the upper seat 32 and support frame 33 are in the forward position, the protrusion 823f is located below the second pressing block 823e and continuously pushes against the second pressing block 823e. The inclined sliding surface on the second pressing block 823e presses against the inclined surfaces on the second right slider 8238 and the second left slider 8239, causing the second left slider 8239 and the second right slider 8238 to move closer together. At this time, the fourth cable 823a and the fifth cable 823b are always in a taut state, and the second left slider 8239 and the second right slider... 8238 slides back into the left connecting seat 331 and the right connecting seat 332, thus making way for the left locking part 511 and the right locking part 521. The first pressing block 8237 is not pushed by the protrusion 823f. The first right slider 8231 and the first left slider 8232 slide away from each other due to the pushing of the fifth return spring 8235 and the sixth return spring 8236. At this time, the second cable 8233 and the third cable 8234 remain in a relaxed state. The first return spring 813 and the third return spring... 823 respectively slides the first left limiting block 8211 and the first right limiting block 821 outward from the left connecting seat 331 and the right connecting seat 332. The left push rod 51 and the right push rod 52 can only move from the push position to the vertical position. And when the left push rod 51 and the right push rod 52 are in the vertical position and the upper seat 32 and the support frame 33 are rotated from the forward position to the rearward position for adjustment, the second pressing block 823e gradually separates from the protrusion 823f, and the seventh return spring 823c and the eighth return spring 823b are then... As the compressed state moves back to its original state, it pushes the second right slider 8238 and the second left slider 8239 away from each other. At this time, the second right slider 8238 and the second left slider 8239 are pressed by the seventh return spring 823c and the eighth return spring 823b respectively, and slide outward. At this time, the left locking part 511 is clamped between the first left limiting block 8211 and the second left limiting block 8211, and the right locking part 521 is clamped between the first right limiting block 8221 and the second right limiting block 8222.

[0070] When the upper seat 32 and support frame 33 move and stop in the reverse position, the protrusion 823f is located below the first pressing block 8237 and presses against the first pressing block 8237. The inclined sliding surface on the first pressing block 8237 presses against the inclined surfaces on the first right slider 8231 and the first left slider 8232, causing the first right slider 8231 and the first left slider 8232 to move closer to each other. At this time, the second cable 8233 and the third cable 8234 move from a slack state to a taut state. The first left limiting block 8211 and the first right limiting block 821 are subjected to the first cable 8233. The pull of the second cable 8233 and the third cable 8234 causes them to retract into the left connecting seat 331 and the right connecting seat 332 respectively, thus making way for the left locking part 511 and the right locking part 521. The second pressing block 823e is not pressed, so the second left slider 8239 and the second right limiting block 824 are in a sliding extended state and continue to abut against the left locking part 511 and the right locking part 521, thereby preventing the left push rod 51 and the right push rod 52 from continuing to rotate forward. The left push rod 51 and the right push rod 52 can then rotate back from the vertical position to the push position.

[0071] like Figures 11 to 12 As shown, the second locking assembly 7 includes a left locking assembly 71 located between the left connecting seat 331 and the left push rod 51, and a right locking assembly 72 located between the right connecting seat 332 and the right push rod 52. The left locking assembly 71 includes a first left locking position 711 and a second left locking position 712 located on the left connecting seat 331. The left locking part 511 is a left locking block located inside the left push rod 51 and capable of sliding relative to it. The left locking block is provided with a left locking protrusion 5111 that can be locked into the first left locking position 711 or the second left locking position 712. A left elastic element 713 is provided between the left locking part 511 and the left push rod 51. The left push rod 51 is also provided with a left operating member 714 that slides the left locking part 511 during operation. A left pull cable 715 is provided between the left operating member 714 and the left locking part 511.

[0072] The right locking assembly 72 includes a first right locking position 721 and a second right locking position 722 disposed on the right connecting seat 332. The right locking part 521 is a right locking block disposed in the right push rod 52 and capable of sliding relative to it. The right locking block is provided with a right locking protrusion 5211 that can be locked into the first right locking position 721 or the second right locking position 722. A right elastic element 723 is provided between the right locking block and the right push rod 52. The right push rod 52 is also provided with a right operating member 724 that drives the right locking part 521 to slide during operation. A right pull cable 725 is provided between the right operating member 724 and the right locking part 521.

[0073] When the upper seat 32 and support frame 33 are in the forward position, the left locking part 511 is engaged in the first left locking position 711 and the right locking part 521 is engaged in the first right locking position 721. When the upper seat 32 and support frame 33 are in the reverse position, the left locking part 511 is engaged in the second left locking position 712 and the right locking part 521 is engaged in the second right locking position 722.

[0074] When it is necessary to unlock the left locking component 71 and the right locking component 72, the left operating member 714 and the right operating member 724 are operated. When the left operating member 714 and the right operating member 724 are operated, they respectively drive the left pull cable 715 and the right pull cable 725 to move. When the left pull cable 715 and the right pull cable 725 move, they respectively drive the left locking part 511 and the right locking part 521 to slide, thereby causing the left locking part 511 and the right locking part 521 to disengage from the first left locking position 711 and the first right locking position 721, respectively. At this time, the left push rod 51 and the right push rod 52 can rotate relative to the left connecting seat 331 and the right connecting seat 332, respectively, and move from the push position to the vertical position. When the upper seat 32 When the support frame 33 rotates to the reverse position, due to the obstruction of the first left limit block 8211 and the first right limit block 821, the left locking part 511 and the right locking part 521 cannot be locked into the first left locking position 711 and the first right locking position 721. When the left push rod 51 and the right push rod 52 move from the vertical position to the push position, the left locking part 511 and the right locking part 521 correspond to the second left locking position 712 and the second right locking position 722 and are locked into the second left locking position 712 and the second right locking position 722 respectively, completing the locking. At this time, the left push rod 51 and the right push rod 52 cannot rotate relative to the left connecting seat 331 and the right connecting seat 332 and are locked in the push position.

[0075] like Figures 22 to 24As shown, the locking assembly 81 includes a left locking assembly 811 disposed between the left push rod 51, the lower seat 31, the upper seat 32, and the support frame 33, and a right locking assembly 812 disposed between the right push rod 52, the lower seat 31, the upper seat 32, and the support frame 33. The left locking assembly 811 includes a locking position 8111 disposed on the lower seat 31. The support frame 33 is provided with a locking block 8112 that can slide relative to it and engage or disengage from the locking position 8111. The support frame 33 is also provided with a sliding block 8113 that can slide up and down relative to it. A sixth cable 811 is provided between the sliding block 8113 and the locking block 8112, which drives the locking block 8112 to slide and disengage from the locking position 8111 when the sliding block 8113 slides. 4. The support frame 33 is provided with a driving slider 8115 that can slide laterally relative to it and drive the sliding block 8113 to slide. The driving slider 8115 is provided with a first inclined sliding surface 81151 and a second inclined sliding surface 81152 in opposite directions. The push rod assembly 5 is provided with a third inclined sliding surface 8116 and a fourth inclined sliding surface 8117 that can respectively press against the first inclined sliding surface 81151 and the second inclined sliding surface 81152 to make the driving slider 8115 slide. A ninth return spring 8118 is provided between the driving slider 8115 and the support frame 33. A tenth return spring 8119 is provided between the locking block 8112 and the support frame 33. An eleventh return spring 811a is provided between the sliding block 8113 and the support frame 33. The right locking assembly 812 has the same structure as the left locking assembly 811.

[0076] When the push rod assembly 5 moves from the push position to the vertical position, the third inclined sliding surface 8116 or the fourth inclined sliding surface 8117 on the left push rod 51 presses against the first inclined sliding surface 81151 or the second inclined sliding surface 81152 on the drive slider 8115. At this time, the drive slider 8115 slides laterally relative to the support frame 33. When the drive slider 8115 slides laterally, its inclined surface pushes against the sliding block 8113, and the sliding block 8113 moves upward relative to the support frame 33. At this time, the sixth cable 8114 drives the locking block 8112 to disengage from the locking position 8111, and the left locking assembly 811 is unlocked. The upper seat 32 and the support frame 33 can then rotate relative to the lower seat 31. The unlocking of the left locking assembly 811 and the right locking assembly 812 is performed simultaneously.

[0077] like Figure 19 and Figure 25 As shown, a positioning component 9 is also provided between the upper seat 32 and the lower seat 31, which can be positioned in a forward or reverse position. The positioning component 9 is used to orient the upper seat 32 and the support frame 33.

[0078] like Figure 19 and Figure 25As shown, the positioning component 9 includes a forward positioning hole 91 and a reverse positioning hole 92 opposite to the forward positioning hole 91 on the upper body 32. The lower body 31 is provided with a positioning member 93 that can slide relative to it. The positioning member 93 is provided with a first abutting surface 931 and a second abutting surface 932 that can disengage the positioning member 93 from the forward positioning hole 91 or the reverse positioning hole 92 when it abuts against the hole wall of the forward positioning hole 91 or the reverse positioning hole 92. A second elastic member 94 is provided between the positioning member 93 and the lower body 31. When the upper body 32 and the support frame 33 are in the forward position, the positioning member 93 is engaged in the forward positioning hole 91. When the upper body 32 and the support frame 33 move from the forward position to the reverse position, the first top surface 931 on the positioning member 93 is pressed down by the wall of the forward positioning hole 91 and slides down to disengage. Until the upper body 32 and the support frame 33 rotate to the reverse position, the reverse positioning hole 92 on the upper body 32 is aligned with the positioning member 93. At this time, the positioning member 93 is pushed by the second elastic member 94 and engaged in the reverse positioning hole 92.

Claims

1. A stroller that can be moved from an unfolded state to a folded state after the locking device is unlocked, characterized in that: The device includes a front leg assembly (11) and a rear leg assembly (12). A support base (3) for mounting a child seat (2) is provided between the tops of the front leg assembly (11) and the rear leg assembly (12). An extension rod (41) is provided inside the support base (3) and can rotate relative to it about a first axis (A) and extend downward. A sliding member (42) is provided on the extension rod (41) and connected to the front leg assembly (11) and the rear leg assembly (12), which can drive the front leg assembly (11) and the rear leg assembly (12) to fold together when sliding relative to the extension rod (41). A push rod assembly (5) is connected to the support base (3) and can rotate relative to it. The front leg assembly (11) includes a first front leg frame (111) rotatably connected to the front end of the support base (3) about a second axis (B). A second front leg is provided between the first front leg frame (111) and the sliding member (42). The frame (112) has a second front leg frame (112) whose lower end is rotatably connected to the first front leg frame (111) about the third axis (C), and the upper end of the second front leg frame (112) is rotatably connected to the sliding member (42) about the fourth axis (D). The lower end of the front leg assembly (11) is also provided with a front wheel (113). The rear leg assembly (12) includes a first rear leg frame (121) rotatably connected to the rear end of the support base (3) about the fifth axis (E). A second rear leg frame (122) is provided between the first rear leg frame (121) and the sliding member (42). The lower end of the second rear leg frame (122) is rotatably connected to the first rear leg frame (121) about the sixth axis (F), and the upper end of the second rear leg frame (122) is rotatably connected to the sliding member (42) about the seventh axis (G). The lower end of the rear leg assembly (12) is also provided with a rear wheel (123).

2. The stroller according to claim 1, characterized in that: The locking device includes a first locking component (6) disposed between the sliding member (42), the extension rod (41), the front leg assembly (11), and the rear leg assembly (12). The first locking component (6) includes a locking position (61) disposed on the sliding member (42). The extension rod (41) is provided with a locking block (62) that can slide laterally relative to it and engage or disengage from the locking position (61). The extension rod (41) is also provided with a driving block (63) that can slide vertically relative to it and drive the locking block (62) to slide laterally. The support base (3) The upper part is provided with an operating handle (64) that can rotate relative to it. A first cable (65) is provided between the operating handle (64) and the drive block (63). A first elastic element (66) that can reset the locking block (62) is provided between the locking block (62) and the extension rod (41). A reset element (67) that can drive the operating handle (64) to reset is provided between the operating handle (64) and the support base (3). A second elastic element (68) that can reset the drive block (63) is provided between the drive block (63) and the extension rod (41).

3. The stroller according to claim 1 or 2, characterized in that: The support base (3) includes a lower seat (31), on which an upper seat (32) is connected, which is rotatable relative to the lower seat (31) in the horizontal direction. A support frame (33) is connected to the upper seat (32) for mounting a child seat (2) and which rotates with the upper seat (32) when the upper seat (32) rotates relative to the lower seat (31). The push rod assembly (5) is rotatably connected to both sides of the support frame (33) and can drive the upper seat (32) and the support frame (33) to rotate in the horizontal direction. The positions where the push rod assembly (5) can stop include those where... The pusher assembly (5) has a push position for pushing the trolley and a vertical position for rotating the upper seat (32) and support frame (33) in the horizontal direction. A second locking assembly (7) is provided between the pusher assembly (5) and the support frame (33) to keep the pusher assembly (5) in the push position when locked. A locking assembly (81) is also provided between the pusher assembly (5), the lower seat (31), the upper seat (32) and the support frame (33) to lock the lower seat (31) and the upper seat (32) and to unlock the lower seat (31) and the upper seat (32) when the pusher assembly (5) rotates to the vertical position.

4. The stroller according to claim 3, characterized in that: The lower seat (31), upper seat (32) and support frame (33) are provided with a stop structure (82) that can prevent the push rod assembly (5) from continuing to rotate forward in the vertical position.

5. The stroller according to claim 4, characterized in that: The positions where the upper seat (32) and support frame (33) stop include the forward position and the reverse position after rotating 180 degrees in the horizontal direction. The support frame (33) is provided with a left connecting seat (331) and a right connecting seat (332) on the left and right sides. The push rod assembly (5) includes a left push rod (51) and a right push rod (52) rotatably connected to the left connecting seat (331) and the right connecting seat (332). The left push rod (51) is provided with a left locking part (511), and the right push rod (52) is provided with a left locking part (511). The device has a right locking part (521). The stop structure (82) includes a left stop assembly (821) located between the left connecting seat (331) and the left push rod (51) and a right stop assembly (822) located between the right connecting seat (332) and the right push rod (52). The left stop assembly (821) includes a first left limiting block (8211) and a second left limiting block (8212) located on the left connecting seat (331) and capable of sliding outward or retracting relative to the left connecting seat (331). The right stop... The blocking assembly (822) includes a first right limiting block (8221) and a second right limiting block (8222) disposed on the right connecting seat (332) and capable of sliding outward or retracting inward relative to it. When the first left limiting block (8211) and the first right limiting block (8221) slide outward and the second left limiting block (8212) and the second right limiting block (8222) slide retract, the first left limiting block (8211) abuts against the left locking part (511) and the first right limiting block (8221) abuts against... The right locking part (521) further prevents the left push rod (51) and the right push rod (52) from continuing to rotate forward. When the second left limiting block (8212) and the second right limiting block (8222) slide out and the first left limiting block (8211) and the first right limiting block (8221) slide back, the second left limiting block (8212) abuts against the left locking part (511) and the second right limiting block (8222) abuts against the right locking part (521), thereby preventing the left push rod (51) and the right push rod (52) from continuing to rotate forward. A first return spring (8213) is provided between the first left limiting block (8211) and the left connecting seat (331), and a second return spring (8214) is provided between the second left limiting block (8212) and the left connecting seat (331). A third return spring (8223) is provided between the first right limiting block (8221) and the right connecting seat (332), and a fourth return spring (8224) is provided between the second right limiting block (8222) and the right connecting seat (332).

6. The stroller according to claim 5, characterized in that: The stop structure (82) further includes a conversion component (823) disposed between the lower seat (31), the upper seat (32), the right stop assembly (822), and the left stop assembly (821). When the upper seat (32) and the support frame (33) are in the forward position, the conversion component (823) causes the first left limiting block (8211) and the first right limiting block (8221) to slide out and causes the second left limiting block (8212) and the second right limiting block (8222) to slide back. When the upper seat (32) and the support frame (33) are in the reverse position... The timing conversion component (823) causes the second left limiting block (8212) and the second right limiting block (8222) to slide out and the first left limiting block (8211) and the first right limiting block (8221) to slide back. During the movement of the upper body (32) and the support frame (33) from the forward position to the reverse position or from the reverse position to the forward position, the timing conversion component (823) causes the first left limiting block (8211), the first right limiting block (8221), the second left limiting block (8212) and the second right limiting block (8222) to slide out simultaneously.

7. The stroller according to claim 6, characterized in that: The conversion assembly (823) includes a first right slider (8231) slidably disposed on the front side of the upper seat (32), a first left slider (8232) slidably disposed on the first right slider (8231), a second cable (8233) between the first left slider (8232) and the first left limiting block (8211), a third cable (8234) between the first right slider (8231) and the first right limiting block (8221), a fifth return spring (8235) and a sixth return spring (8236) between the first right slider (8231) and the first left slider (8232) capable of pushing the two together and causing them to slide away from each other, and the lower seat (31) being provided with a mechanism to push the first left slider (8232). The first pressing block (8237) slides closer to the first right slider (8231) and the first left slider (8232) when the first right slider (8231) slides further away from the first left slider (8232) when the second cable (8233) and the third cable (8234) are in a relaxed state, causing the first left limiting block (8211) and the first right limiting block (8221) to slide out and prevent the left push rod (51) and the right push rod (52) from continuing to rotate forward. When the first right slider (8231) and the first left slider (8232) slide closer to each other and the second cable (8233) and the third cable (8234) are in a taut state, the first left limiting block (8211) and the first right limiting block (8221) slide back and make way for the left push rod (51) and the right push rod (52). The upper seat (32) is provided with a second right slider (8238) that can slide relative to it on its rear side. A second left slider (8239) that can slide relative to it is provided on the second right slider (8238). A fourth cable (823a) is provided between the second left slider (8239) and the second left limiting block (8212). A fifth cable (823b) is provided between the second right slider (8238) and the second right limiting block (8222). A seventh return spring (823c) and an eighth return spring (823d) are provided between the second right slider (8238) and the second left slider (8239) to push them apart and cause them to slide away from each other. The lower seat (31) is provided with a cable that can push the second left slider (8239) and... When the second right slider (8238) slides closer to the second top block (823e), and the second right slider (8238) slides further away from the second left slider (8239), the fourth cable (823a) and the fifth cable (823b) are in a relaxed state, causing the second left limit block (8212) and the second right limit block (8222) to slide out, thereby preventing the left push rod (51) and the right push rod (52) from continuing to rotate forward. When the second right slider (8238) slides closer to the second left slider (8239), the second cable (8233) and the third cable (8234) are in a taut state, causing the second left limit block (8212) and the second right limit block (8222) to slide back, thereby making way for the left push rod (51) and the right push rod (52). The lower seat (31) is provided with a protrusion (823f) on the rear side, which can push the first pressing block (8237) or the second pressing block (823e) to slide upward when the upper seat (32) rotates relative to the lower seat (31) on the horizontal plane.

8. The stroller according to claim 5, characterized in that: The second locking assembly (7) includes a left locking assembly (71) located between the left connecting seat (331) and the left push rod (51) and a right locking assembly (72) located between the right connecting seat (332) and the right push rod (52). The left locking assembly (71) includes a first left locking position (711) and a second left locking position (712) located on the left connecting seat (331). The left locking part (511) is a left locking part located inside the left push rod (51) and capable of sliding relative to it. The left locking block is provided with a left locking protrusion (5111) that can be locked into the first left locking position (711) or the second left locking position (712). A left elastic element (713) is provided between the left locking part (511) and the left push rod (51). The left push rod (51) is also provided with a left operating member (714) that slides with the left locking part (511) during operation. A left pull cable (715) is provided between the left operating member (714) and the left locking part (511). The right locking assembly (72) includes a first right locking position (721) and a second right locking position (722) provided on the right connecting seat (332). The right locking part (521) is a right locking block provided in the right push rod (52) and capable of sliding relative to it. The right locking block is provided with a right locking protrusion (5211) that can be locked into the first right locking position (721) or the second right locking position (722). A right elastic element (723) is provided between the right locking block and the right push rod (52). The right push rod (52) is also provided with a right operating member (724) that drives the right locking part (521) to slide during operation. A right pull cable (725) is provided between the right operating member (724) and the right locking part (521). When the upper body (32) and support frame (33) are in the forward position, the left locking part (511) is locked into the first left locking position (711) and the right locking part (521) is locked into the first right locking position (721). When the upper body (32) and support frame (33) are in the reverse position, the left locking part (511) is locked into the second left locking position (712) and the right locking part (521) is locked into the second right locking position (722).

9. The stroller according to claim 3, characterized in that: The locking assembly (81) includes a left locking assembly (811) located between the left push rod (51), the lower seat (31), the upper seat (32), and the support frame (33), and a right locking assembly (812) located between the right push rod (52), the lower seat (31), the upper seat (32), and the support frame (33). The left locking assembly (811) includes a locking position (8111) on the lower seat (31). The support frame (33) is provided with a locking block (8112) that can slide relative to it and engage or disengage from the locking position (8111). The support frame (33) is also provided with a sliding block (8113) that can slide up and down relative to it. A sixth cable (81) is provided between the sliding block (8113) and the locking block (8112) so that when the sliding block (8113) slides, it drives the locking block (8112) to slide and disengage from the locking position (8111). 14), the support frame (33) is provided with a driving slider (8115) that can slide relative to it laterally and drive the sliding block (8113) to slide. The driving slider (8115) is provided with a first inclined sliding surface (81151) and a second inclined sliding surface (81152) in opposite directions. The push rod assembly (5) is provided with a third inclined sliding surface (8116) and a fourth inclined sliding surface (8117) that can press against the first inclined sliding surface (81151) and the second inclined sliding surface (81152) respectively to make the driving slider (8115) slide. A ninth return spring (8118) is provided between the driving slider (8115) and the support frame (33). A tenth return spring (8119) is provided between the locking block (8112) and the support frame (33). An eleventh return spring (811a) is provided between the sliding block (8113) and the support frame (33).

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