Baby stroller joint structure and baby stroller

Abstract

A second joint assembly, a third joint assembly and a rotating frame are rotationally connected to a first joint assembly, a linkage piece is arranged between the rotating frame and the second joint assembly, and when the third joint assembly and the second joint assembly are in an unfolded state, the linkage piece is arranged between the rotating frame and the second joint assembly. The stop position of the third joint assembly comprises a first direction position and a second direction position, a locking mechanism is arranged between the third joint assembly and the first joint assembly, and a clutch assembly capable of enabling the third joint assembly and the rotating frame to be in a separated or connected state when the locking mechanism is unlocked is arranged between the third joint assembly and the rotating frame. When the third joint assembly and the rotating frame are in a separated state, the third joint assembly is switched between the first direction position and the second direction position, and when the third joint assembly and the rotating frame are in a connected state, the third joint assembly and the second joint assembly are switched between the unfolded state and the folded state. The folding chair is easy and convenient to unfold or fold and smooth to fold.

Description

Technical Field

[0001] This utility model relates to a joint structure for a children's stroller. This utility model also relates to a children's stroller. Background Technology

[0002] Strollers are common products used during a child's growth. Their joint structure includes a first joint assembly and second and third joint assemblies that can rotate relative to the first joint assembly. The first joint assembly connects to a first leg with wheels, the second joint assembly connects to a second leg with wheels, and the third joint assembly connects to a push rod assembly. The stroller's seat assembly is connected to the first joint assembly. The stroller can be folded or unfolded by rotating the second and third joint assemblies relative to the first joint assembly. Furthermore, when the stroller is unfolded, the push rod assembly can generally rotate to change direction, stopping at either a forward or reverse position. When the push rod assembly is in the forward position, both the adult and the child in the seat assembly face forward, meaning they are facing the same direction. After rotating a certain angle, the push rod assembly reaches the reverse position, where the adult and child in the seat assembly face each other, facilitating interaction between them. However, for strollers with this type of push rod assembly that can remain in either the forward or reverse position, the push rod assembly and the second leg need to be operated separately during the unfolding or folding process, making the unfolding or folding action of the stroller rather cumbersome.

[0003] Therefore, this utility model was created based on the above-mentioned shortcomings. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a simple joint structure for children's strollers. Strollers using this joint structure are easy to operate when unfolding or folding, and the unfolding or folding action is smooth.

[0005] This utility model also provides a children's stroller that is easy to unfold or fold.

[0006] This utility model is achieved through the following technical solution:

[0007] A stroller joint structure includes a first joint assembly, a second joint assembly rotatable relative to the first joint assembly, and a third joint assembly and a rotating frame rotatable relative to the first joint assembly. A linkage is provided between the rotating frame and the second joint assembly to drive them to rotate in tandem. The third and second joint assemblies can maintain states including an unfolded state relative to the first joint assembly and a folded state relative to the first joint assembly. When the third and second joint assemblies are in the unfolded state, the third joint assembly can remain in a first directional position and after rotating a set angle relative to the first joint assembly. In the second orientation position, a locking mechanism is provided between the third joint assembly and the first joint assembly to lock the third joint assembly in the first orientation position or the second orientation position. A clutch assembly is provided between the third joint assembly and the rotating frame to allow the two to be in a separated or engaged state when the locking mechanism is unlocked. When the third joint assembly and the rotating frame are in a separated state, the third joint assembly can rotate relative to the rotating frame to switch between the first orientation position and the second orientation position. When the third joint assembly and the rotating frame are in an engaged state, the third joint assembly and the rotating frame can rotate together relative to the first joint assembly to allow the third joint assembly and the second joint assembly to switch between an unfolded state and a folded state.

[0008] The locking mechanism includes a first locking position and a second locking position spaced apart along the circumferential direction on the first joint assembly. The third joint assembly is slidably provided with a locking block that can engage or disengage with the first locking position or the second locking position. When the locking block engages with the first locking position or the second locking position, the third joint assembly stays in the first direction position or the second direction position. The third joint assembly is also provided with a first return spring that can push the locking block to slide and reset.

[0009] The clutch assembly includes an engagement position on the rotating frame, and the third joint assembly has an engagement block that can engage or disengage with the engagement position. The rotating frame also has an arc-shaped clearance groove that communicates with the engagement position and can make way for the engagement block when the third joint assembly switches between the first direction position and the second direction position.

[0010] The rotating frame is also provided with a receiving groove that communicates with the arc-shaped clearance groove. When the third joint assembly is in the first direction position, the connecting block engages with the connecting position. When the third joint assembly is in the second direction position, the connecting block is received in the receiving groove.

[0011] The third joint assembly is provided with a sliding rod that can slide, and the engaging block is disposed on the sliding rod. The rotating frame is also provided with a first engaging position and a second engaging position at intervals along the circumferential direction. The sliding rod is also provided with an engaging block that can engage or disengage with the first engaging position or the second engaging position. The third joint assembly is also provided with a second return spring that can push the sliding rod to slide back to its original position.

[0012] The locking block is disposed within the third joint assembly and can slide relative to the sliding rod. When the sliding rod slides to disengage the locking block from the first or second locking position, the locking block pushes the locking block to disengage it from the first or second locking position. The first reset spring is disposed between the sliding rod and the locking block.

[0013] The linkage component includes a linkage plate, the upper end of which is pivotally connected to the rotating frame and offset from the rotation axis of the rotating frame and the first joint assembly, and the lower end of which is pivotally connected to the second joint assembly and offset from the rotation axis of the second joint assembly and the first joint assembly.

[0014] The first joint assembly includes a first support rod and a first joint seat fixedly connected to the first support rod; the second joint assembly includes a second support rod and a second joint seat fixedly connected to the second support rod and rotatably connected to the first joint seat about a first axis; the third joint assembly includes a third support rod and a third joint seat fixedly connected to the third support rod and rotatably connected to the first joint seat about a second axis.

[0015] The first joint seat is also connected to a seat plate that can be rotated and unfolded or folded relative to it. The first joint assembly is connected to an exposed movable cap that can be pushed into the first joint assembly by the seat plate when rotated and unfolded. The second joint seat is provided with a locking hole. A locking pin is provided between the movable cap and the second joint seat, which can slide relative to the movable cap and can engage or disengage with the locking hole. A first elastic element is provided between the movable cap and the locking pin, which can push the locking pin to engage with the locking hole when the movable cap is pushed by the seat plate. The first joint assembly is also provided with a second elastic element that can push the movable cap to move outward of the first joint assembly when the seat plate and the movable cap are disengaged. Furthermore, the movable cap is provided with a strip-shaped hole, and the locking pin is provided with a protruding pin that passes through the strip-shaped hole. When the movable cap is pushed outward by the second elastic element, the movable cap moves outward together with the locking pin, causing the locking pin to disengage from the locking hole.

[0016] A stroller includes the stroller joint structure described above. A first leg is connected to a first joint assembly, a second leg is connected to a second joint assembly, and a foldable push rod is connected to a third joint assembly. A first wheel assembly is located at the lower end of the first leg, and a second wheel assembly is located at the lower end of the second leg. A first wheel orientation mechanism is provided between the first leg and the first wheel assembly, and a second wheel orientation mechanism is provided between the second leg and the second wheel assembly. A pushing part is provided on the third joint assembly. When the third joint assembly rotates from a first position to a second position, the pushing part unlocks the first wheel orientation mechanism and locks the second wheel orientation mechanism. When the third joint assembly rotates from a second position to a first position, the pushing part unlocks the second wheel orientation mechanism and locks the first wheel orientation mechanism. A foldable seat assembly is also connected to the first joint assembly.

[0017] Compared with the prior art, this utility model has the following advantages: When the third joint assembly and the second joint assembly of the stroller joint structure of this utility model are in the unfolded state, the locking mechanism can lock the third joint assembly in the first or second direction position, so that the push rod assembly of the stroller stays in the forward or reverse position. When it is necessary to adjust the position of the third joint assembly, the locking mechanism is unlocked. Once the locking mechanism is unlocked, the clutch assembly between the third joint assembly and the rotating frame can separate or engage the third joint assembly and the rotating frame. When the two are in the separated state, the third joint assembly can rotate relative to each other. The frame rotates, switching between a first and a second directional position to adjust the position of the stroller's push rod assembly, allowing the stroller to be pushed forward or backward. When the stroller needs to be folded, the locking mechanism is unlocked, and the clutch assembly engages the third joint assembly with the rotating frame. When engaged, the third joint assembly and the rotating frame can rotate together relative to the first joint assembly. During rotation, the rotating frame drives the second joint assembly to rotate in tandem via a linkage, meaning the third and second joint assemblies move closer to or unfold relative to the first joint assembly. Therefore, the stroller joint structure of this invention achieves linkage between the third and second joint assemblies when unfolding or folding, and the third joint assembly can also switch between the first and second directional positions when unfolded. The stroller with the joint structure of this utility model realizes the linkage between the second leg and the push rod assembly when unfolding or folding. In addition, when the stroller is unfolded, the push rod assembly can switch between forward and reverse positions, so as to achieve the purpose of the push rod assembly being able to change direction and making the unfolding or folding operation of the stroller simple, which is suitable for widespread application. Attached Figure Description

[0018] Figure 1This is a perspective view of the children's stroller of this utility model with the joint structure in the unfolded state and the third joint component locked in the first direction position.

[0019] Figure 2 This is a three-dimensional view of the joint structure of the children's stroller of this utility model during the folding process;

[0020] Figure 3 This is an exploded view of the joint structure of the children's stroller of this utility model;

[0021] Figure 4 This is one of the side views of the children's stroller of this utility model when the joint structure is in the unfolded state and the third joint component is locked in the first direction position;

[0022] Figure 5 This is the second side view of the children's stroller of this utility model with the joint structure in the unfolded state and the third joint component locked in the first direction position;

[0023] Figure 6 This is one of the side views of the children's stroller of this utility model with the joint structure in the unfolded state and the third joint component locked in the second direction position;

[0024] Figure 7 This is the second side view of the children's stroller of this utility model with the joint structure in the unfolded state and the third joint component locked in the second direction position.

[0025] Figure 8 This is one of the side views of the children's stroller of this utility model when the joint structure is in the unfolded state and the third joint component is in the unlocked state in the first direction position;

[0026] Figure 9 This is the second side view of the children's stroller of this utility model with the joint structure in the unfolded state and the third joint component in the unlocked state in the second direction position.

[0027] Figure 10 This is one of the side views of the joint structure of the children's stroller of this utility model during the folding process;

[0028] Figure 11 This is the second side view of the joint structure of the children's stroller of this utility model in the process of folding;

[0029] Figure 12 This is one of the side views of the joint structure of the children's stroller of this utility model when it is in a folded state;

[0030] Figure 13 This is the second side view of the joint structure of the children's stroller of this utility model when it is in a folded state;

[0031] Figure 14This is the third side view of the children's stroller of this utility model with the joint structure in the unfolded state and the third joint component locked in the first direction position;

[0032] Figure 15 This is the fourth side view of the children's stroller of this utility model with the joint structure in the unfolded state and the third joint component locked in the first direction position.

[0033] Figure 16 This is the third side view of the children's stroller of this utility model with the joint structure in the unfolded state and the third joint component locked in the second direction position.

[0034] Figure 17 This is a perspective view of the third joint component of the joint structure of the children's stroller of this utility model;

[0035] Figure 18 This is a side view of the stroller of this utility model in the unfolded state with the third joint component in the first direction position;

[0036] Figure 19 This is a side view of the stroller of this utility model in the unfolded state with the third joint assembly in the second direction position.

[0037] Figure 20 This is a perspective view of the joint structure of the children's stroller of this utility model when connecting the seat assembly;

[0038] Figure 21 This is a cross-sectional view of the joint structure of the children's stroller of this utility model;

[0039] Figure 22 yes Figure 21 A magnified view at point Z;

[0040] Figure 23 This is a perspective view of the components of the joint structure of the children's stroller of this utility model. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings:

[0042] like Figures 1 to 13As shown, a stroller joint structure includes a first joint assembly 1, to which a second joint assembly 2 and a third joint assembly 3, which are rotatable relative to the first joint assembly 1, are connected. The third joint assembly 3 and the second joint assembly 2 can maintain states including an unfolded state relative to the first joint assembly 1 and a folded state relative to the first joint assembly 1. When the third joint assembly 3 and the second joint assembly 2 are in the unfolded state, the third joint assembly 3 can remain in a first directional position and a second directional position after rotating a set angle relative to the first joint assembly 1. When the third joint assembly 3 is in the first directional position, the stroller's push rod assembly 93 is in the forward position, and when an adult pushes the stroller, they face the same direction as the child (e.g., when pushing the stroller). Figure 18 (As shown); when the third joint assembly 3 is in the second direction position, the push rod assembly 93 of the stroller is in the reverse position, and the adult pushes the stroller facing the child (as shown). Figure 19 (As shown). A locking mechanism 7 is provided between the third joint assembly 3 and the first joint assembly 1, which can lock the third joint assembly 3 in a first direction position or a second direction position.

[0043] like Figures 1 to 13As shown, a rotating frame 4 is rotatably connected to the first joint assembly 1. A linkage 5 is provided between the rotating frame 4 and the second joint assembly 2, which can drive the two to rotate together. A clutch assembly 6 is provided between the third joint assembly 3 and the rotating frame 4, which can separate or engage the two when the locking mechanism 7 is unlocked. When the third joint assembly 3 and the rotating frame 4 are in a separated state, the third joint assembly 3 can rotate relative to the rotating frame 4 and switch between a first direction position and a second direction position. When the third joint assembly 3 and the rotating frame 4 are in an engaged state, the third joint assembly 3 and the rotating frame 4 can rotate together relative to the first joint assembly 1, so that the third joint assembly 3 and the second joint assembly 2 can switch between an unfolded state and a folded state. When the locking mechanism 7 is unlocked, the third joint assembly 3 and the first joint assembly 1 are in the unlocked state and can rotate relative to each other. In the unlocked state of the unlocking mechanism 7, the clutch assembly 6 between the third joint assembly 3 and the rotating frame 4 can separate or engage them. When the third joint assembly 3 and the rotating frame 4 are in the separated state, the third joint assembly 3 can rotate relative to the rotating frame 4, so that the third joint assembly 3 can move from the first direction position to the second direction position or from the second direction position to the first direction position. When the third joint assembly 3 and the rotating frame 4 are in the engaged state, the third joint assembly 3 and the rotating frame 4 can rotate together relative to the first joint assembly 3. During the rotation, the rotating frame 4 drives the second joint assembly 2 to rotate in linkage through the linkage 5, so that the third joint assembly 3 and the second joint assembly 2 rotate towards or unfold towards the first joint assembly 1 in sync, realizing the linkage unfolding or retracting of the third joint assembly 3 and the second joint assembly 2. When the stroller is folded or unfolded, the push rod assembly 93 only needs to rotate towards the first leg 91 to move or unfold, which will also cause the second leg 92 to rotate towards the first leg 91 to move or unfold, making the folding or unfolding operation of the stroller very convenient and quick.

[0044] like Figures 1 to 4 , Figure 6 , Figure 8 , Figure 10 and Figure 12As shown, the locking mechanism includes a first locking position 71 and a second locking position 72 spaced apart along the circumferential direction on the first joint assembly 1. A locking block 73 is slidably disposed within the third joint assembly 3, capable of engaging or disengaging with the first locking position 71 or the second locking position 72. When the locking block 73 engages with the first locking position 71 or the second locking position 72, the third joint assembly 3 remains in the first or second directional position. The third joint assembly 3 also includes a first return spring 74 that can push the locking block 73 to slide back to its original position. When the locking block 73 slides and disengages from the first locking position 71, the third joint assembly 3 can rotate relative to the first joint assembly 1, thereby moving from the first directional position to the second directional position. When the locking block 73 aligns with the second locking position 72, the force applied to the locking block 73 is released, and the first return spring 74 pushes the locking block 73 back to its original position, causing the locking block 73 to engage with the second locking position 72, thus keeping the third joint assembly 3 in the second directional position. Thus, by alternately engaging the locking block 73 with the first locking position 71 or the second locking position 72, the push rod assembly 93 of the stroller can be locked in the forward or reverse position.

[0045] like Figure 3 , Figure 5 , Figure 7 , Figure 9 , Figure 11 and Figure 13 As shown, the clutch assembly 6 includes an engagement position 61 provided on the rotating frame 4, and an engagement block 62 that can engage or disengage from the engagement position 61 is slidably provided in the third joint assembly 3. The rotating frame 4 is also provided with an arc-shaped clearance groove 63 that communicates with the engagement position 61 and can make way for the engagement block 62 when the third joint assembly 3 switches between the first direction position and the second direction position. When the locking mechanism 7 is unlocked, the locking block 73 disengages from either the first locking position 71 or the second locking position 72. At this time, the third joint assembly 3 can rotate relative to the first joint assembly 1. If it is necessary to switch the third joint assembly 3 between the first and second directional positions, the third joint assembly 3 is rotated to move the engaging block 62 within the arc-shaped clearance groove 63, thus allowing the third joint assembly 3 to switch between the first and second directional positions. If it is necessary to switch the third joint assembly 3 between the unfolded and folded states, the third joint assembly is rotated to push the side wall of the engaging block 62 against the corresponding position of the engaging position 61 on the rotating frame 4. This allows the third joint assembly 3 to rotate relative to the first joint assembly 1 while simultaneously pushing the rotating frame 4 to rotate relative to the first joint assembly 1. During this process, the rotating frame 4, through the linkage 5, drives the second joint assembly 2 to rotate relative to the first joint assembly 1, thereby achieving synchronous unfolding or folding of the third joint assembly 3 and the second joint assembly 2 relative to the first joint assembly 1. In this embodiment, the engaging position 61 is a hole provided on the rotating frame 4. When the third joint assembly 3 is unfolded or folded, the side wall of the engaging block 62 pushes against the hole wall of the engaging position 61.

[0046] like Figure 3 , Figure 5 , Figure 7 , Figure 9 , Figure 11 and Figure 13 As shown, the rotating frame 4 is also provided with a receiving groove 41 communicating with the arc-shaped clearance groove 63. When the third joint assembly 3 is in the first direction position, the engaging block 62 engages with the engaging position 61. When the third joint assembly 3 is in the second direction position, the engaging block 62 is received in the receiving groove 41. When the third joint assembly 3 switches from the second direction position to the first direction position, the engaging block 62 is first removed from the receiving groove 41 and the locking block 73 is removed from the second locking position 72. Then, the third joint assembly 3 is rotated, and the engaging block 62 moves in the arc-shaped groove 63. When the engaging block 62 moves to the engaging position 61, the third joint assembly 3 reaches the first direction position. If the third joint assembly 3 needs to stay in the first direction position at this time, the force on the locking block 72 and the engaging block 62 is released. The locking block 72 engages with the first locking position 71, and the engaging block 72 cooperates with the engaging position 61. If the third joint assembly 3 needs to continue moving to the folding position when it reaches the first direction position from the second direction position, the force on the locking block 72 and the engaging block 62 is released. In the first direction position, the locking block 73 is disengaged from the first locking position 71, and the third joint assembly 3 continues to rotate. At this time, the engaging block 62 inside the third joint assembly 3 pushes against the wall of the engaging position 61 hole, causing the rotating frame 4 to rotate with the third joint assembly 3, thereby linking the second joint assembly 2 to move to the folded state. During the specific folding operation, once the locking block 73 is misaligned with the first locking position 71, the force on the locking block 73 and the engaging block 62 can be released, and the third joint assembly 3 can continue to rotate. At this time, the locking block 73 abuts against the circumferential surface of the first joint assembly 1 and slides along the circumferential surface until the third joint assembly 3 and the second joint assembly 2 move to the folded state. When the third joint assembly 3 and the second joint assembly 2 need to move from the folded state to the unfolded state, the third joint assembly 3 can be moved. The engaging block 62 pushes the rotating frame 4 to rotate at the engaging position 61. The rotating frame 4 drives the second joint assembly 2 to rotate through the linkage 5, thereby making the third joint assembly 3 and the second joint assembly 2 unfold synchronously.

[0047] like Figures 1 to 13As shown, the third joint assembly 3 is provided with a sliding rod 65, and the engaging block 62 is disposed on the sliding rod 65. The rotating frame 4 is also provided with a first engaging position 81 and a second engaging position 82 at intervals along the circumferential direction. The sliding rod 65 is also provided with an engaging block 83 that can engage or disengage with the first engaging position 81 or the second engaging position 82. The third joint assembly 3 is also provided with a second return spring 66 that can push the sliding rod 65 to slide back to its original position. The locking block 73 is disposed in the third joint assembly 3 and can slide relative to the sliding rod 65. When the sliding rod 65 slides to disengage the locking block 83 from the first engaging position 81 or the second engaging position 82, the locking block 83 pushes the locking block 73 to disengage the locking block 73 from the first engaging position 71 or the second engaging position 72. The first return spring 74 is disposed between the sliding rod 65 and the locking block 73. The engagement of the locking block 83 with the first locking position 81 or the second locking position 82 makes the third joint assembly 3 more stable when it is in the first or second directional position, thus ensuring less wobbling when the push rod assembly 93 of the stroller is in the forward or reverse position, making it more comfortable for the user. Furthermore, the disengagement of the locking block 73 from the first locking position 81 or the second locking position 82 is achieved by pushing the locking block 83 away. Simultaneously with the disengagement of the locking block 83 from the first or second locking position 81, the locking mechanism 7 is unlocked, a clever design that makes the structure more compact. At the same time as the locking block 83 disengages from the first or second locking position 81, the engaging block 62 also moves within the engaging position 61 or disengages from the receiving groove 41. During the switching between the unfolded and folded states of the third joint assembly 3, the first return spring 74 pushes the locking block 73, causing the locking block 73 to slide along the circumference of the first joint assembly 3. Meanwhile, the second return spring 66 pushes the sliding rod 65 to slide back to its original position, causing the locking block 83 to engage with the first locking position 81 and the engaging block 62 to engage with the engaging position 61. This ensures that the third joint assembly 3 can smoothly drive the rotating frame 4 to rotate during the rotation unfolding or folding process, so as to drive the second joint assembly 2 to unfold or fold through the linkage 5.

[0048] like Figures 1 to 4 As shown, the linkage 5 includes a linkage plate. The upper end of the linkage plate is pivotally connected to the rotating frame 4 and is offset from the rotation axis of the rotating frame 4 and the first joint assembly 1. The lower end of the linkage plate is pivotally connected to the second joint assembly 2 and is offset from the rotation axis of the second joint assembly 2 and the first joint assembly 1.

[0049] like Figures 1 to 11As shown, the first joint assembly 1 includes a first support rod 11 and a first joint seat 12 fixedly connected to the first support rod 11. The second joint assembly 2 includes a second support rod 21 and a second joint seat 22 fixed to the second support rod 21 and rotatably connected to the first joint seat 12 about a first axis A. The third joint assembly 3 includes a third support rod 32 and a third joint seat 33 fixed to the third support rod 32 and rotatably connected to the first joint seat 12 about a second axis B. The push rod assembly 3 of the stroller is connected to the third support rod 32, the first support leg 91 is connected to the first support rod 11, and the second support leg 92 is connected to the second support rod 21 (e.g., Figure 18 and Figure 19 ).

[0050] like Figures 20 to 23As shown, the first joint seat 12 is also connected to a seat plate 20 that can be rotated, unfolded, or folded relative to it. The first joint assembly 1 is connected to an exposed movable cap 301 that can be pushed into the first joint assembly 1 by the seat plate 20 when rotated and unfolded. The second joint seat 22 is provided with a locking hole 302. A locking pin 303 is provided between the movable cap 301 and the second joint seat 22, which can slide relative to the movable cap 301 and can engage or disengage with the locking hole 302. A locking pin 303 is provided between the movable cap 301 and the locking pin 303, which can push the locking pin when the movable cap 301 is pushed by the seat plate 20. The first elastic element 304 engages with the locking hole 302. The first joint assembly 1 is also provided with a second elastic element 305 that can push the movable cap 301 to move outward when the seat plate 20 and the movable cap 301 are disengaged. The movable cap 301 is provided with a strip hole 306. The locking pin 303 is provided with a protruding pin 307 that passes through the strip hole 306. When the movable cap 301 is pushed outward by the second elastic element 305, the movable cap 301 moves outward together with the locking pin 303, thereby disengaging the locking pin 303 from the locking hole 302. When the seat plate 20 rotates and unfolds relative to the first joint assembly 1, the seat plate 20 pushes the movable cap 301 to move inward toward the first joint assembly 1. When the movable cap 301 moves, it presses against the second elastic element 305 and pushes the locking pin 303 to move through the first elastic element 304. The locking pin 303 then engages with the locking hole 302 on the second joint seat 22. At this time, the locking pin 303 locks the first joint assembly 1 and the second joint assembly 2. Therefore, when the seat plate 20 rotates and unfolds, it can further keep the first joint assembly 1 and the second joint assembly 2 locked. Even if the third joint assembly 3 switches between the first direction position and the second direction position at this time, the first joint assembly 1 and the second joint assembly 2 cannot rotate relative to each other and fold, which can ensure safety. When folding is required, the seat plate 20 is first rotated and folded relative to the first joint assembly 1. Once the seat plate 20 stops pushing the movable cap 301, the second elastic element 305 pushes the movable cap 301 outward. The end of the strip hole 306 then drives the protruding pin 307, causing the locking pin 303 to also move outward and disengage from the locking hole 302. Once disengaged, the first joint assembly 1 is unlocked from the second joint assembly 2, at which point the entire joint structure can be folded. Therefore, the first joint assembly 1 and the second joint assembly 2 can only be folded after the seat plate 20 is folded relative to the first joint assembly 1, thus ensuring the safety and reliability of the joint structure when applied to a stroller. Furthermore, the first elastic element 304 and the second elastic element 305 ensure that the seat plate 20 can unfold smoothly even when the locking pin 303 and the locking hole 302 are not yet aligned when the movable cap 301 is pushed inward, thus preventing the entire structure from jamming.

[0051] like Figures 1 to 23As shown, a stroller includes the stroller joint structure described above. A first support leg 91 is connected to a first joint assembly 1, a second support leg 92 is connected to a second joint assembly 2, and a foldable push rod 93 is connected to a third joint assembly 3. A first wheel assembly 94 is located at the lower end of the first support leg 91, and a second wheel assembly 95 is located at the lower end of the second support leg 92. A first wheel directional mechanism 96 is provided between the first support leg 91 and the first wheel assembly 94, and a second wheel directional mechanism 97 is provided between the second support leg 92 and the second wheel assembly 95. A pushing part 34 is provided on the third joint assembly 3. When the stroller rotates from one direction to the second direction, the pusher 34 unlocks the first wheel orientation mechanism 96 and locks the second wheel orientation mechanism 97. When the third joint assembly 3 rotates from the second direction to the first direction, the pusher 34 unlocks the second wheel orientation mechanism 97 and locks the first wheel orientation mechanism 96. A foldable seat assembly 98 is also connected to the first joint assembly 1. The pusher 34 is a pusher wall provided on the third joint assembly 3. When the third joint assembly 3 rotates, the distance between the rotation axis of the third joint assembly 3 and the pusher wall changes, causing the pusher wall to drive the second wheel orientation mechanism 97 and the first wheel orientation mechanism 96 to move. When the third joint assembly 3 is in the first direction, the pusher assembly 93 is in the forward position. At this time, the second wheel orientation mechanism 97 is in the unlocked state and the first wheel orientation mechanism 96 is in the locked state. The second wheel assembly 95 can rotate 360 ​​degrees on the horizontal plane to control the forward direction of the stroller, while the first wheel assembly 94 cannot rotate on the horizontal plane. When the push rod assembly 93 is in the reverse position, the second wheel orientation mechanism 97 is locked while the first wheel orientation mechanism 96 is unlocked. The second wheel assembly 95 cannot rotate on the horizontal plane, while the first wheel assembly 94 can rotate 360 ​​degrees in the horizontal direction to control the forward direction of the stroller. The switching between the unlocked and locked states of the second wheel orientation mechanism 97 and the first wheel orientation mechanism 96 is controlled by the push wall on the third joint assembly 3 during the unfolding or folding process, making the switching operation between the unlocked and locked states of the second wheel orientation mechanism 97 and the first wheel orientation mechanism 96 more convenient and faster. The second wheel orientation mechanism 97 and the first wheel orientation mechanism 96 can adopt a traditional orientation structure, which will not be described in detail here.

[0052] The present invention has been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the invention.

Claims

1. A child's pushchair articulation structure characterised in that: The system includes a first joint assembly (1), on which a second joint assembly (2) is connected and can rotate relative to it. The first joint assembly (1) is also connected to a third joint assembly (3) and a rotating frame (4) that can rotate relative to it. A linkage (5) is provided between the rotating frame (4) and the second joint assembly (2) to drive them to rotate in a coordinated manner. The states that the third joint assembly (3) and the second joint assembly (2) can maintain include an unfolded state relative to the first joint assembly (1) and a folded state relative to the first joint assembly (1). When the third joint assembly (3) and the second joint assembly (2) are in the unfolded state, the positions that the third joint assembly (3) can remain in include a first directional position and a second directional position after rotating a set angle relative to the first joint assembly (1). A locking mechanism (7) is provided between the third joint assembly (3) and the first joint assembly (1) to lock the third joint assembly (3) in a first direction position or a second direction position. A clutch assembly (6) is provided between the third joint assembly (3) and the rotating frame (4) to allow the two to be in a separated or engaged state when the locking mechanism (7) is unlocked. When the third joint assembly (3) and the rotating frame (4) are in a separated state, the third joint assembly (3) can rotate relative to the rotating frame (4) and switch between the first direction position and the second direction position. When the third joint assembly (3) and the rotating frame (4) are in an engaged state, the third joint assembly (3) and the rotating frame (4) can rotate together relative to the first joint assembly (1) so that the third joint assembly (3) and the second joint assembly (2) can switch between an unfolded state and a folded state.

2. A child's pushchair articulation structure according to claim 1, wherein: The locking mechanism includes (7) a first locking position (71) and a second locking position (72) spaced apart along the circumferential direction on the first joint assembly (1). The third joint assembly (3) is slidably provided with a locking block (73) that can engage or disengage with the first locking position (71) or the second locking position (72). When the locking block (73) engages with the first locking position (71) or the second locking position (72), the third joint assembly (3) stays in the first direction position or the second direction position. The third joint assembly (3) is also provided with a first return spring (74) that can push the locking block (73) to slide and reset.

3. The child's pushchair articulation structure of claim 2, wherein: The clutch assembly (6) includes an engagement position (61) provided on the rotating frame (4), and the third joint assembly (3) is provided with an engagement block (62) that can engage or disengage with the engagement position (61). The rotating frame (4) is also provided with an arc-shaped clearance groove (63) that communicates with the engagement position (61) and can make way for the engagement block (62) when the third joint assembly (3) switches between the first direction position and the second direction position.

4. The child's pushchair articulation structure of claim 3, wherein: The rotating frame (4) is also provided with a receiving groove (41) that communicates with the arc-shaped relief groove (63). When the third joint assembly (3) is in the first direction position, the connecting block (62) engages with the connecting position (61). When the third joint assembly (3) is in the second direction position, the connecting block (62) is received in the receiving groove (41).

5. A child's pushchair articulation structure according to claim 4, wherein: The third joint assembly (3) is provided with a sliding rod (65) that can slide. The connecting block (62) is provided on the sliding rod (65). The rotating frame (4) is also provided with a first engaging position (81) and a second engaging position (82) at intervals along the circumferential direction. The sliding rod (65) is also provided with a engaging block (83) that can engage or disengage with the first engaging position (81) or the second engaging position (82). The third joint assembly (3) is also provided with a second return spring (66) that can push the sliding rod (65) to slide and reset.

6. A child's pushchair articulation structure according to claim 5, wherein: The locking block (73) is disposed within the third joint assembly (3) and can slide relative to the sliding rod (65). When the sliding rod (65) slides to disengage the locking block (83) from the first locking position (81) or the second locking position (82), the locking block (83) pushes the locking block (73) to disengage the locking block (73) from the first locking position (71) or the second locking position (72). The first reset spring (74) is disposed between the sliding rod (65) and the locking block (73).

7. The child's vehicle articulation structure according to claim 1, wherein: The linkage component (5) includes a linkage plate. The upper end of the linkage plate is pivotally connected to the rotating frame (4) and offset from the rotation axis of the rotating frame (4) and the first joint assembly (1). The lower end of the linkage plate is pivotally connected to the second joint assembly (2) and offset from the rotation axis of the second joint assembly (2) and the first joint assembly (1).

8. A child's pushchair articulation structure according to any one of claims 1 to 7, wherein: The first joint assembly (1) includes a first support rod (11) and a first joint seat (12) fixedly connected to the first support rod (11). The second joint assembly (2) includes a second support rod (21) and a second joint seat (22) fixedly connected to the second support rod (21) and rotatably connected to the first joint seat (12) about a first axis (A). The third joint assembly (3) includes a third support rod (32) and a third joint seat (33) fixedly connected to the third support rod (32) and rotatably connected to the first joint seat (12) about a second axis (B).

9. The child's vehicle articulation structure according to claim 8, characterized in that: The first joint seat (12) is also connected to a seat plate (20) that can be rotated and unfolded or folded relative to it. The first joint assembly (1) is connected to an exposed movable cap (301) that can be pushed into the first joint assembly (1) by the seat plate (20) when rotated and unfolded. The second joint seat (22) is provided with a locking hole (302). A locking pin (303) is provided between the movable cap (301) and the second joint seat (22) that can slide relative to the movable cap (301) and can engage or disengage with the locking hole (302). A locking pin (303) is provided between the movable cap (301) and the locking pin (303) that can push the locking pin (303) when the movable cap (301) is pushed by the seat plate (20). The first elastic element (304) engages with the locking hole (302). The first joint assembly (1) is also provided with a second elastic element (305) that can push the movable cap (301) to move outward when the seat plate (20) and the movable cap (301) are disengaged. The movable cap (301) is provided with a strip hole (306). The locking pin (303) is provided with a protruding pin (307) that passes through the strip hole (306). When the movable cap (301) is pushed outward by the second elastic element (305), the movable cap (301) moves outward together with the locking pin (303) so that the locking pin (303) disengages from the locking hole (302).

10. A stroller characterized by: The stroller includes the joint structure of any one of claims 1 to 9, wherein a first leg (91) is connected to the first joint assembly (1), a second leg (92) is connected to the second joint assembly (2), a foldable push rod (93) is connected to the third joint assembly (3), a first wheel assembly (94) is provided at the lower end of the first leg (91), a second wheel assembly (95) is provided at the lower end of the second leg (92), a first wheel orientation mechanism (96) is provided between the first leg (91) and the first wheel assembly (94), and the second leg (92) and the second wheel assembly... A second wheel orientation mechanism (97) is provided between (95), and a pusher (34) is provided on the third joint assembly (3). When the third joint assembly (3) rotates from the first direction position to the second direction position, the pusher (34) unlocks the first wheel orientation mechanism (96) and locks the second wheel orientation mechanism (97). When the third joint assembly (3) rotates from the second direction position to the first direction position, the pusher (34) unlocks the second wheel orientation mechanism (97) and locks the first wheel orientation mechanism (96). A foldable seat assembly (98) is also connected to the first joint assembly (1).

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