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 device is easy and convenient to unfold or fold and smooth to fold.

Description

Technical Field

[0001] The present invention relates to a joint structure of a baby stroller. The present invention also relates to a baby stroller.

Background Art

[0002] A baby stroller is a common product in the process of a child's growth. Its joint structure includes a first joint component, a second joint component and a third joint component that can rotate relative to the first joint component. A first leg with a wheel is connected to the first joint component, a second leg with a wheel is connected to the second joint component, and a push rod component is connected to the third joint component. The seat component of the baby stroller is connected to the first joint component. By rotating the second joint component and the third joint component relative to the first joint component, the baby stroller can be folded or unfolded. In addition, when the baby stroller is in the unfolded state, the push rod component can generally rotate and reverse its direction. The positions where it stays include the forward position or the reverse position. When the push rod component stays in the forward position, both the adult and the child in the seat component face forward, that is, the adult and the child face the same direction. When the push rod component rotates a certain angle, it can reach the reverse position. At this position, the adult can face the child in the seat component face to face, which is convenient for the adult and the child to interact. However, for such baby strollers where the push rod component can stay in the forward position or the reverse position, both the push rod component and the second leg need to be operated separately during the unfolding or folding process, making the unfolding or folding operation of the baby stroller rather troublesome.

[0003] Therefore, the present invention is precisely produced based on the above deficiencies.

Summary of the Invention

[0004] The object of the present invention is to overcome the deficiencies of the prior art and provide a joint structure of a baby stroller with a simple structure. The baby stroller adopting this joint structure of the baby stroller is easy to operate during unfolding or folding, and the unfolding or folding action is smooth.

[0005] The present invention also provides a baby stroller with easy unfolding or folding operation.

[0006] The present invention is achieved by the following technical solutions:

[0007] A joint structure of a child stroller comprises a first joint assembly, the first joint assembly is connected to a second joint assembly that can rotate relative to the first joint assembly, the first joint assembly is also connected to a third joint assembly that can rotate relative to the first joint assembly and a rotating frame, a linkage member that can drive the two to rotate in linkage with each other is provided between the rotating frame and the second joint assembly, the states that the third joint assembly and the second joint assembly can maintain include an expanded state that is expanded relative to the first joint assembly and a folded state that is closed relative to the first joint assembly, when the third joint assembly and the second joint assembly are in the expanded state, the position that the third joint assembly can stay in includes a first direction position and a position after rotating a set angle relative to the first joint assembly The folding mechanism is configured to enable the rotatable frame to be in a state of separation or engagement when the third joint assembly is in a state of separation. The rotatable frame is configured to enable the rotatable frame to be in a state of separation or engagement when the third joint assembly is in a state of separation. The rotatable frame is configured to enable the rotatable frame to be in a state of separation or engagement when the third joint assembly is in a state of engagement. The rotatable frame is configured to enable the rotatable frame to be in a state of separation or engagement when the third joint assembly is in a state of separation. The rotatable frame is configured to enable the rotatable frame to be in a state of separation or engagement when the third joint assembly is in a state of engagement. The rotatable frame is configured to be configured to enable the rotatable frame to be in a state of separation or engagement when the third joint assembly is in a state of engagement.

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

[0009] The clutch assembly includes an engagement position arranged on a rotating frame, and an engagement block that can engage with or disengage from the engagement position is slidably provided in the third joint assembly. The rotating frame is also provided with an arc-shaped making way groove that is connected to 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 connected to the arc-shaped giving way groove. When the third joint assembly stays in the first direction, the engaging block is engaged with the engaging position. When the third joint assembly stays in the second direction, the engaging block is accommodated in the receiving groove.

[0011] A slidable sliding rod is provided inside the third joint assembly. The engaging block is arranged on the sliding rod. A first engaging position and a second engaging position are also spaced along the circumferential direction on the rotating frame. A engaging block that can engage with or disengage from the first engaging position or the second engaging position is also provided on the sliding rod. A second return spring that can push the sliding rod to slide back to its original position is further provided inside the third joint assembly.

[0012] The engaging block is arranged inside the third joint assembly and can slide relative to the sliding rod. When the sliding rod slides to disengage the engaging block from the first engaging position or the second engaging position, the engaging block pushes against the engaging block to disengage the engaging block from the first engaging position or the second engaging position. The first return spring is arranged between the sliding rod and the engaging block.

[0013] The linkage member includes a linkage piece. The upper end of the linkage piece is pivotally connected to the rotating frame and deviates from the rotation axis position of the rotating frame and the first joint assembly. The lower end of the linkage piece is pivotally connected to the second joint assembly and deviates from the rotation axis position of the second joint assembly and the first joint assembly.

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

[0015] A seat assembly that can be rotated and unfolded or folded relative to it is also connected to the first joint seat. An exposed moving cap that can be pushed by the seat assembly when it is rotated and unfolded and move inward into the first joint assembly is connected to the first joint assembly. A locking hole is provided on the second joint seat. A locking pin that can slide relative to the moving cap and can engage with or disengage from the locking hole is provided between the moving cap and the second joint seat. A first elastic element that can push the locking pin to engage with the locking hole when the moving cap is pushed by the seat assembly is provided between the moving cap and the locking pin. A second elastic element that can push the moving cap to move outward of the first joint assembly when the seat assembly is disengaged from the moving cap is further provided inside the first joint assembly. And, a strip-shaped hole is provided on the moving cap, and a protruding pin that penetrates into the strip-shaped hole is provided on the locking pin. When the moving cap is pushed by the second elastic element and moves outward, the moving cap drives the locking pin to move outward together, so that the locking pin is disengaged from the locking hole.

[0016] A child stroller comprises a child stroller joint structure as described above, wherein the first joint assembly is connected to a first leg, the second joint assembly is connected to a second leg, and a foldable push rod is connected to the third joint assembly, a first wheel assembly is provided at the lower end of the first leg, a second wheel assembly is provided at the lower end of the second leg, a first wheel orientation mechanism is provided between the first leg and the first wheel assembly, a second wheel orientation mechanism is provided between the second leg and the second wheel assembly, a pushing portion is provided on the third joint assembly, when the third joint assembly rotates from a first direction position to a second direction position, the pushing portion unlocks the first wheel orientation mechanism and locks the second wheel orientation mechanism, when the third joint assembly rotates from the second direction position to the first direction position, the pushing portion unlocks the second wheel orientation mechanism and locks the first wheel orientation mechanism, and a foldable seat assembly is also connected to the first joint assembly.

[0017] Compared with the prior art, the present invention has the following advantages: when the third joint assembly and the second joint assembly of the joint structure of the child stroller of the present invention are in the unfolded state, the locking mechanism can lock the third joint assembly in the first direction position or the second direction position, so that the push rod assembly of the child stroller stays in the forward position or the reverse position. When the position of the third joint assembly needs to be adjusted, the locking mechanism is unlocked. Once the locking mechanism is unlocked, the clutch assembly between the third joint assembly and the rotating frame can make the third joint assembly and the rotating frame in a separated or engaged state. When the two are in the separated state, the third joint assembly can rotate relative to the rotating frame and switch between the first direction position and the second direction position, thereby adjusting the position of the push rod assembly of the child stroller, and the child stroller can be pushed forward or reversely. When the child stroller needs to be folded, the locking mechanism is in the unlocked state and the clutch assembly makes the third joint assembly and the rotating frame in an engaged state. When the two are in the engaged state, the third joint assembly and the rotating frame can rotate relative to the first joint assembly together. During the rotation process, the rotating frame drives the second joint assembly to rotate in conjunction with each other through the linkage member, that is, the third joint assembly and the second joint assembly are relatively close to or unfolded relative to the first joint assembly. Therefore, the third joint assembly and the second joint assembly are linked when the joint structure of the stroller of the present invention is unfolded or folded, and the third joint assembly can also switch between the first direction position and the second direction position when in the unfolded state. The stroller using the joint structure of the stroller of the present invention also realizes the linkage between the second leg and the push rod assembly when unfolded or folded, and the push rod assembly can also switch between the forward position and the reverse position when the stroller is unfolded, achieving the purpose of the push rod assembly being able to change direction and making the unfolding or folding operation of the stroller simple, and is suitable for popularization and application.

Brief Description of the Drawings

[0018] Figure 1Is a perspective view of the joint structure of the stroller of the present invention in the unfolded state and with the third joint assembly locked in the first direction position;

[0019] Figure 2 Is a perspective view of the joint structure of the stroller of the present invention during the folding process;

[0020] Figure 3 Is an exploded view of the joint structure of the stroller of the present invention;

[0021] Figure 4 Is one of the side views of the joint structure of the stroller of the present invention in the unfolded state and with the third joint assembly locked in the first direction position;

[0022] Figure 5 Is the second side view of the joint structure of the stroller of the present invention in the unfolded state and with the third joint assembly locked in the first direction position;

[0023] Figure 6 Is one of the side views of the joint structure of the stroller of the present invention in the unfolded state and with the third joint assembly locked in the second direction position;

[0024] Figure 7 Is the second side view of the joint structure of the stroller of the present invention in the unfolded state and with the third joint assembly locked in the second direction position;

[0025] Figure 8 Is one of the side views of the joint structure of the stroller of the present invention in the unfolded state and with the third joint assembly unlocked in the first direction position;

[0026] Figure 9 Is the second side view of the joint structure of the stroller of the present invention in the unfolded state and with the third joint assembly unlocked in the second direction position;

[0027] Figure 10 Is one of the side views of the joint structure of the stroller of the present invention during the folding process;

[0028] Figure 11 Is the second side view of the joint structure of the stroller of the present invention during the folding process;

[0029] Figure 12 Is one of the side views of the joint structure of the stroller of the present invention in the folded state;

[0030] Figure 13 Is the second side view of the joint structure of the stroller of the present invention in the folded state;

[0031] Figure 14 Is the third side view of the joint structure of the stroller of the present invention in the unfolded state and with the third joint assembly locked in the first direction position;

[0032] Figure 15 This is a fourth side view of the child stroller joint structure of the present invention when it is in an unfolded state and the third joint assembly is locked in the first direction position;

[0033] Figure 16 This is the third side view of the child stroller when the joint structure of the present invention is in an unfolded state and the third joint assembly is locked in the second direction position.

[0034] Figure 17 is a three-dimensional diagram of the third joint assembly of the joint structure of the child stroller of the present invention;

[0035] Figure 18 is a side view of the child stroller of the present invention when it is in an unfolded state and the third joint assembly is in a first direction position;

[0036] Figure 19 It is a side view of the child stroller of the present invention when it is in an unfolded state and the third joint assembly is in a second direction position.

[0037] Figure 20 is a three-dimensional diagram of the joint structure of the child stroller of the present invention connected to the seat assembly;

[0038] Figure 21 is a cross-sectional view of the joint structure of the child stroller of the present invention;

[0039] Figure 22 yes Figure 21 Magnified view at center Z;

[0040] Figure 23 It is a stereoscopic view of the parts of the joint structure of the child stroller of the present invention. [Specific implementation method]

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

[0042] like Figures 1 to 13 As shown, a joint structure of a child stroller includes a first joint component 1, and the first joint component 1 is connected to a second joint component 2 and a third joint component 3 that can rotate relative to the first joint component 1. The states that the third joint component 3 and the second joint component 2 can maintain include an unfolded state relative to the first joint component 1 and a folded state relative to the first joint component 1. When the third joint component 3 and the second joint component 2 are in the unfolded state, the position that the third joint component 3 can stay in includes a first direction position and a second direction position after rotating a set angle relative to the first joint component 1. When the third joint component 3 stays in the first direction position, the push rod assembly 93 of the child stroller is in the forward position, and the adult faces the same direction as the child when pushing the child stroller (such as Figure 18When the third joint assembly 3 stays in the second direction, the push rod assembly 93 of the stroller is in the reverse position, and the adult pushes the stroller face to face with the child (as shown); Figure 19 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 the first direction or the second direction.

[0043] like Figures 1 to 13 As shown, the first joint component 1 is also rotatably connected to a rotating frame 4, and a linkage part 5 is provided between the rotating frame 4 and the second joint component 2, which can drive the two to rotate in linkage, and a clutch component 6 is provided between the third joint component 3 and the rotating frame 4, which can make the two be in a separated or engaged state when the locking mechanism 7 is unlocked. When the third joint component 3 and the rotating frame 4 are in a separated state, the third joint component 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 component 3 and the rotating frame 4 are in an engaged state, the third joint component 3 and the rotating frame 4 can rotate together relative to the first joint component 1 so that the third joint component 3 and the second joint component 2 can switch between an expanded 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 an unlocked state, and the two can rotate relative to each other, and when the unlocking mechanism 7 is unlocked, the clutch assembly 6 between the third joint assembly 3 and the rotating frame 4 can make the two be in a state of separation or engagement with each other. When the third joint assembly 3 and the rotating frame 4 are in a mutually 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, and when the third joint assembly 3 and the rotating frame 4 are in a state of engagement with each other, the third joint assembly 3 and the rotating frame 4 can rotate together relative to the first joint assembly 3. During the rotation process, the rotating frame 4 drives the second joint assembly 2 to rotate in conjunction with the linkage member 5, so that the third joint assembly 3 and the second joint assembly 2 are synchronously rotated, approached or unfolded toward the first joint assembly 1, thereby realizing the linkage expansion or retraction of the third joint assembly 3 and the second joint assembly 2. That is, when the stroller is folded or unfolded, the push rod assembly 93 only needs to rotate toward or unfold the first leg 91 to achieve the second leg 92 also rotating toward or unfolding the first leg 91, 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 first locking positions 71 and second locking positions 72 that are circumferentially spaced apart on the first joint assembly 1. A locking block 73 that can engage with or disengage from the first locking position 71 or the second locking position 72 is slidably disposed within the third joint assembly 3. 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. A first return spring 74 that can push the locking block 73 to slide back to its original position is also disposed within the third joint assembly 3. When driving the locking block 73 to slide and disengage 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 direction position to the second direction position. When the locking block 73 aligns with the second locking position 72, releasing the force applied to the locking block 73, the first return spring 74 then pushes the locking block 73 back to its original position so that the locking block 73 engages with the second locking position 72, causing the third joint assembly 3 to stay in the second direction 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 position or the reverse position.

[0045] As Figure 3 , Figure 5 , Figure 7 , Figure 9 , Figure 11 and Figure 13 As shown, the clutch assembly 6 includes an engaging position 61 provided on the rotating frame 4. An engaging block 62 that can engage with or disengage from the engaging position 61 is slidably disposed within the third joint assembly 3. An arc-shaped relief groove 63 that communicates with the engaging position 61 and can provide a space for the engaging block 62 when the third joint assembly 3 switches between the first direction position and the second direction position is also provided on the rotating frame 4. After the locking mechanism 7 is unlocked and the locking block 73 disengages from both the first locking position 71 and the second locking position 72, the third joint assembly 3 can rotate relative to the first joint assembly 1. At this time, if it is necessary to switch the third joint assembly 3 between the first direction position and the second direction position, rotate the third joint assembly 3 so that the engaging block 62 moves within the arc-shaped relief groove 63, and the third joint assembly 3 can be switched between the first direction position and the second direction position. At this time, if it is necessary to switch the third joint assembly 3 between the unfolded state and the folded state, rotate the third joint assembly so that the side wall of the engaging block 62 pushes against the corresponding position of the engaging position 61 on the rotating frame 4, causing the third joint assembly 3 to rotate relative to the first joint assembly 1 while being able to push the rotating frame 4 to rotate relative to the first joint assembly 1. During this process, the rotating frame 4 drives the second joint assembly 2 to rotate relative to the first joint assembly 1 through the linkage 5, thereby realizing the 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 unfolds or folds, 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 connected with the arc-shaped giving way groove 63. When the third joint assembly 3 stays in the first direction position, the engaging block 62 engages with the engaging position 61. When the third joint assembly 3 stays in the second direction position, the engaging block 62 is accommodated 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 withdrawn from the receiving groove 41 and the clamping block 73 is withdrawn from the second clamping position 72. Then, the third joint assembly 3 is rotated, and the engaging block 62 moves in the arc-shaped position groove 63. When the engaging block 62 moves to the engaging position 61, the third joint assembly 3 reaches the first direction position. At this time, if the third joint assembly 3 needs to stay in the first direction position, the force on the clamping block 72 and the engaging block 62 is released, and the clamping block 72 is engaged with the first clamping position 71, and the engaging block 72 cooperates with the engaging position 61. If the third joint assembly 3 needs to continue to move to the folding position when it reaches the first direction position from the second direction position State, then in the first direction position, the retaining block 73 is disengaged from the first retaining position 71 and the third joint assembly 3 continues to rotate. At this time, the engaging block 62 in the third joint assembly 3 pushes the hole wall of the engaging position 61 to make the rotating frame 4 rotate with the third joint assembly 3, thereby linking the second joint assembly 2 to move to the folded state. In the specific folding operation process, once the block 73 is misaligned with the first retaining position 71, the force on the block 73 and the engaging block 62 can be released, and the third joint assembly 3 can be continued to rotate. At this time, the block 73 abuts against the peripheral surface of the first joint assembly 1 and slides along the peripheral 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 pulled, and the engaging block 62 pushes the rotating frame 4 to rotate at the engaging position 61, and the rotating frame 4 drives the second joint assembly 2 to rotate through the linkage 5, so that the third joint assembly 3 and the second joint assembly 2 are synchronously unfolded.

[0047] like Figures 1 to 13As shown, a slidable sliding rod 65 is provided inside the third joint assembly 3, and the engaging block 62 is arranged 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 further provided with an engaging block 83 that can engage with or disengage from the first engaging position 81 or the second engaging position 82. A second return spring 66 capable of pushing the sliding rod 65 to slide back to its original position is also provided inside the third joint assembly 3. The locking block 73 is arranged inside the third joint assembly 3 and can slide relative to the sliding rod 65. When the sliding rod 65 slides to disengage the engaging block 83 from the first engaging position 81 or the second engaging position 82, the engaging 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 return spring 74 is arranged between the sliding rod 65 and the locking block 73. The engagement of the engaging block 83 with the first engaging position 81 or the second engaging position 82 can make the third joint assembly 3 stay more stably in the first direction position or the second direction position, thereby ensuring that the push rod assembly 93 of the baby stroller shakes less when staying in the forward position or the reverse position, and the user feels more comfortable. Moreover, the disengagement of the locking block 73 from the first engaging position 81 or the second engaging position 82 is pushed by the engaging block 83. When the engaging block 83 disengages from the first engaging position 81 or the second engaging position 82, the locking mechanism 7 is driven to unlock at the same time. The design is ingenious and makes the structure more compact. When the engaging block 83 disengages from the first engaging position 81 or the second engaging position 82, the engaging block 62 also moves or disengages from the receiving groove 41 within the engaging position 61. During the switching process of the third joint assembly 3 between the unfolded state and the folded state, the first return spring 74 pushes the locking block 73 to make the locking block 73 slide along the circumferential surface of the first joint assembly 3, and the second return spring 66 can push the sliding rod 65 to slide back to its original position to make the engaging block 83 engage with the first engaging position 81 and the engaging block 62 engage with the engaging position 61, thereby ensuring that the third joint assembly 3 can smoothly drive the rotating frame 4 to rotate during the rotation and unfolding or folding process, so as to drive the second joint assembly 2 to unfold or fold through the linkage member 5.

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

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

[0050] As Figures 20 to 23As shown, a seat assembly 20 capable of rotating and unfolding or folding relative thereto is further connected to the first joint seat 12. An exposed moving cap 301 that can be pushed by the seat assembly 20 during rotation and unfolding and move inward into the first joint assembly 1 is connected to the first joint assembly 1. A locking hole 302 is provided on the second joint seat 22. A locking pin 303 that can slide relative to the moving cap 301 and engage or disengage with the locking hole 302 is provided between the moving cap 301 and the second joint seat 22. A first elastic element 304 that can push the locking pin 303 to engage with the locking hole 302 when the moving cap 301 is pushed by the seat assembly 20 is provided between the moving cap 301 and the locking pin 303. A second elastic element 305 that can push the moving cap 301 to move outward of the first joint assembly 1 when the seat assembly 20 is disengaged from the moving cap 301 is further provided inside the first joint assembly 1. Moreover, a strip-shaped hole 306 is provided on the moving cap 301, and a protruding pin 307 penetrating into the strip-shaped hole 306 is provided on the locking pin 303. When the moving cap 301 is pushed by the second elastic element 305 and moves outward, the moving cap 301 drives the locking pin 303 to move outward together, so that the locking pin 303 is disengaged from the locking hole 302. When the seat assembly 20 rotates and unfolds relative to the first joint assembly 1, the seat assembly 20 pushes the moving cap 301 to move inward into the first joint assembly 1. When the moving cap 301 moves, it presses the second elastic element 305 and pushes the locking pin 303 to move through the first elastic element 304. The locking pin 303 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 assembly 20 rotates and unfolds, the first joint assembly 1 and the second joint assembly 2 can be further 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 and fold relative to each other, ensuring safety. When folding is required, first rotate and fold the seat assembly 20 relative to the first joint assembly 1. Once the seat assembly 20 no longer pushes the moving cap 301, the second elastic element 305 pushes the moving cap 301 to move outward. The end of the strip-shaped hole 306 drives the protruding pin 307, so that the locking pin 303 also moves outward and disengages from the locking hole 302. Once disengaged, the first joint assembly 1 is unlocked from the second joint assembly 2, and at this time, the entire joint structure can be folded. Therefore, only after the seat assembly 20 is folded relative to the first joint assembly 1 can the first joint assembly 1 be folded with the second joint assembly 2, ensuring safety and reliability when the joint structure is applied to a baby stroller. Moreover, the first elastic element 304 and the second elastic element 305 are provided to ensure that when the seat assembly 20 pushes the moving cap 301 to move inward, even if the locking pin 303 and the locking hole 302 are not aligned yet, the seat assembly 3 can be smoothly unfolded, and the entire structure is also prevented from being stuck.

[0051] As shown Figures 1 to 23 in the figure, a baby stroller includes the baby stroller joint structure as described above. A first leg 91 is connected to the first joint assembly 1, a second leg 92 is connected to the second joint assembly 2, and 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, and 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 a second wheel orientation mechanism 97 is provided between the second leg 92 and the second wheel assembly 95. A pushing portion 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 pushing portion 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 pushing portion 34 unlocks the second wheel orientation mechanism 97 and locks the first wheel orientation mechanism 96. A foldable seat assembly 98 is further connected to the first joint assembly 1. The pushing portion 34 is a pushing 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 pushing wall changes, causing the pushing 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 position, the push rod 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 baby stroller, while the first wheel assembly 94 cannot rotate in the horizontal plane direction. When the push rod assembly 93 is in the reverse position, the second wheel orientation mechanism 97 is in the locked state and the first wheel orientation mechanism 96 is in the unlocked state. The second wheel assembly 95 cannot rotate on the horizontal plane, while the first wheel assembly 94 can rotate 360 degrees in the horizontal plane direction to control the forward direction of the baby stroller. The unlocking or locking state switching of the second wheel orientation mechanism 97 and the first wheel orientation mechanism 96 is controlled by the pushing wall on the third joint assembly 3 during the unfolding or folding process, making the unlocking or locking state switching operation of the second wheel orientation mechanism 97 and the first wheel orientation mechanism 96 more convenient and fast. The second wheel orientation mechanism 97 and the first wheel orientation mechanism 96 can adopt traditional orientation structures, which will not be elaborated here.

[0052] The above has described this embodiment in detail with reference to the drawings. However, the present invention is not limited to the above embodiment. Within the knowledge scope of those of ordinary skill in the art in the said technical field, various changes can be made without departing from the gist of the present invention.

Claims

1. A joint structure of a baby stroller, characterized in that: The invention comprises a first joint component (1), wherein the first joint component (1) is connected to a second joint component (2) which can rotate relative to the first joint component, and the first joint component (1) is also connected to a third joint component (3) and a rotating frame (4) which can rotate relative to the first joint component, and a linkage member (5) which can drive the two to rotate in linkage with each other is provided between the rotating frame (4) and the second joint component (2), and the states which the third joint component (3) and the second joint component (2) can maintain include an unfolded state in which the third joint component (3) and the second joint component (2) are unfolded relative to the first joint component (1) and a folded state in which the third joint component (3) is closed relative to the first joint component (1), and when the third joint component (3) and the second joint component (2) are in the unfolded state, the position in which the third joint component (3) can stay includes a first direction position and a second direction position after rotating a set angle relative to the first joint component (1), and the third joint component (3) can stay in the first direction position. A locking mechanism (7) capable of locking the third joint assembly (3) in a first direction position or a second direction position is provided between the third joint assembly (3) and the first joint assembly (1); a clutch assembly (6) capable of placing the third joint assembly (3) and the rotating frame (4) in a separated or engaged state when the locking mechanism (7) is unlocked is provided between the third joint assembly (3) and the rotating frame (4); 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) switch between an unfolded state and a folded state.

2. The joint structure of the baby stroller according to claim 1, wherein: The locking mechanism comprises (7) a first latching position (71) and a second latching position (72) arranged on the first joint component (1) at intervals along the circumferential direction; a latching block (73) which can be engaged with or disengaged from the first latching position (71) or the second latching position (72) is slidably arranged in the third joint component (3); when the latching block (73) is engaged with the first latching position (71) or the second latching position (72), the third joint component (3) stays in the first direction position or the second direction position; and a first return spring (74) which can push the latching block (73) to slide and return is also arranged in the third joint component (3).

3. The joint structure of the baby stroller according to claim 2, characterized in that: The clutch assembly (6) comprises an engagement position (61) arranged on the rotating frame (4); an engagement block (62) is slidably arranged in the third joint assembly (3) and can engage with or disengage from the engagement position (61); the rotating frame (4) is also provided with an arc-shaped clearance groove (63) which is connected to 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 joint structure of the baby stroller according to claim 3, wherein: The rotating frame (4) is also provided with a receiving groove (41) connected to the arc-shaped giving way groove (63); when the third joint assembly (3) stays in the first direction position, the engaging block (62) engages with the engaging position (61); when the third joint assembly (3) stays in the second direction position, the engaging block (62) is accommodated in the receiving groove (41).

5. The joint structure of the stroller according to claim 4, wherein: The third joint assembly (3) is provided with a sliding rod (65) capable of sliding, the engaging block (62) is arranged on the sliding rod (65), the rotating frame (4) is also provided with a first engaging position (81) and a second engaging position (82) spaced apart in the circumferential direction, the sliding rod (65) is also provided with an engaging block (83) capable of engaging with or disengaging from the first engaging position (81) or the second engaging position (82), and the third joint assembly (3) is also provided with a second return spring (66) capable of pushing the sliding rod (65) to slide and return.

6. The joint structure of the baby stroller according to claim 5, characterized in that: The clamping block (73) is arranged in the third joint assembly (3) and can slide relative to the sliding rod (65). When the sliding rod (65) slides to disengage the clamping block (83) from the first clamping position (81) or the second clamping position (82), the clamping block (83) pushes the clamping block (73) to disengage the clamping block (73) from the first clamping position (71) or the second clamping position (72). The first return spring (74) is arranged between the sliding rod (65) and the clamping block (73).

7. The joint structure of the stroller according to claim 1, wherein: The linkage member (5) comprises a linkage plate, the upper end of which is pivotally connected to the rotating frame (4) and deviates from the rotation axis position of the rotating frame (4) and the first joint component (1), and the lower end of which is pivotally connected to the second joint component (2) and deviates from the rotation axis position of the second joint component (2) and the first joint component (1).

8. The joint structure of a baby stroller according to any one of claims 1 to 7, characterized in that: The first joint assembly (1) comprises a first support rod (11) and a first joint seat (12) fixedly connected to the first support rod (11); the second joint assembly (2) comprises 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) around a first axis (A); the third joint assembly (3) comprises 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) around a second axis (B).

9. The joint structure of the stroller according to claim 8, wherein: A seat assembly (20) capable of rotating and unfolding or folding relative thereto is further connected to the first joint seat (12). A moving cap (301) which is exposed and can be pushed by the seat assembly (20) during rotation and unfolding to move into the first joint assembly (1) is connected to the first joint assembly (1). A locking hole (302) is provided on the second joint seat (22). A locking pin (303) which can slide relative to the moving cap (301) and can engage with or disengage from the locking hole (302) is provided between the moving cap (301) and the second joint seat (22). A first elastic element (304) which can push the locking pin (303) to engage with the locking hole (302) when the moving cap (301) is pushed by the seat assembly (20) is provided between the moving cap (301) and the locking pin (303). A second elastic element (305) which can push the moving cap (301) to move outward of the first joint assembly (1) when the seat assembly (20) is disengaged from the moving cap (301) is further provided inside the first joint assembly (1). Moreover, a strip-shaped hole (306) is provided on the moving cap (301), and a protruding pin (307) penetrating into the strip-shaped hole (306) is provided on the locking pin (303). When the moving cap (301) is pushed by the second elastic element (305) to move outward, the moving cap (301) drives the locking pin (303) to move outward together, so that the locking pin (303) is disengaged from the locking hole (302).

10. A baby stroller, characterized in that: Comprising a stroller joint structure according to any one of claims 1 to 9, 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 handle (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), a second wheel orientation mechanism (97) is provided between the second leg (92) and the second wheel assembly (95), a pushing part (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 pushing part (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 pushing part (34) unlocks the second wheel orientation mechanism (97) and locks the first wheel orientation mechanism (96). A foldable seat assembly (98) is further connected to the first joint assembly (1).

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